TMAG5273A2QDBVR

TMAG5273 SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 TMAG5273 Low-Power Linear 3D Hall-Effect Sensor With I2C Interface 1 Features 3 Description • The TMAG5273 is a low-power linear 3D Hall-effect sensor designed for a wide range of industrial and personal electronics applications. This device integrates three independent Hall-effect sensors in the X, Y, and Z axes. A precision analog signalchain along with an integrated 12-bit ADC digitizes the measured analog magnetic field values. The I2C interface, while supporting multiple operating VCC ranges, ensures seamless data communication with low-voltage microcontrollers. The device has an integrated temperature sensor available for multiple system functions, such as thermal budget check or temperature compensation calculation for a given magnetic field. • • • • • • • • • • • • Configurable power modes including: – 2.3-mA active mode current – 1-µA wake-up and sleep mode current – 5-nA sleep mode current Selectable linear magnetic range at X, Y, or Z axis: – TMAG5273x1: ±40 mT, ±80 mT – TMAG5273x2: ±133 mT, ±266 mT Interrupt signal from user-defined magnetic and temperature threshold cross 5% (typical) sensitivity drift Integrated angle CORDIC calculation with gain and offset adjustment 20-kSPS single axis conversion rate Configurable averaging up to 32x for noise reduction Conversion trigger by I2C or dedicated INT pin Optimized I2C interface with cyclic redundancy check (CRC): – Maximum 1-MHz I2C clock speed – Special I2C frame reads for improved throughput – Factory-programmed and user-configurable I2C addresses Integrated temperature compensation for multiple magnet types Built-in temperature sensor 1.7-V to 3.6-V supply voltage VCC range Operating temperature range: –40℃ to +125℃ 2 Applications • • • • • • • • • Electricity meters Electronic smart lock Smart thermostat Joystick & gaming controllers Drone payload control Door & window sensor Magnetic proximity sensor Mobile robot motor control E-bike The TMAG5273 can be configured through the I2C interface to enable any combination of magnetic axes and temperature measurements. Additionally, the device can be configured to various power options (including wake-up and sleep mode) allowing designers to optimize system power consumption based on their system-level needs. Multiple sensor conversion schemes and I2C read frames help optimize throughput and accuracy. A dedicated INT pin can act as a system interrupt during low power wake-up and sleep mode, and can also be used by a microcontroller to trigger a new sensor conversion. An integrated angle calculation engine (CORDIC) provides full 360° angular position information for both on-axis and off-axis angle measurement topologies. The angle calculation is performed using two user-selected magnetic axes. The device features magnetic gain and offset correction to mitigate the impact of system mechanical error sources. The TMAG5273 is offered in four different factoryprogrammed I2C addresses. The device also supports additional I2C addresses through the modification of a user-configurable I2C address register. Each orderable part can be configured to select one of two magnetic field ranges that suits the magnet strength and component placement during system calibration. The device performs consistently across a wide ambient temperature range of –40°C to +125°C. Device Information(1) PART NUMBER TMAG5273 Application Block Diagram (1) PACKAGE DBV (6) BODY SIZE (NOM) 2.90 mm × 1.60 mm For all available packages, see the package option addendum at the end of the data sheet. An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Table of Contents 1 Features............................................................................1 2 Applications..................................................................... 1 3 Description.......................................................................1 4 Revision History.............................................................. 2 5 Pin Configuration and Functions...................................3 6 Specifications.................................................................. 4 6.1 Absolute Maximum Ratings ....................................... 4 6.2 ESD Ratings .............................................................. 4 6.3 Recommended Operating Conditions ........................4 6.4 Thermal Information ...................................................4 6.5 Electrical Characteristics ............................................5 6.6 Temperature Sensor .................................................. 6 6.7 Magnetic Characteristics For A1 ................................6 6.8 Magnetic Characteristics For A2 ................................7 6.9 Magnetic Temp Compensation Characteristics ..........8 6.10 I2C Interface Timing .................................................8 6.11 Power up & Conversion Time ...................................8 6.12 Typical Characteristics.............................................. 9 7 Detailed Description......................................................10 7.1 Overview................................................................... 10 7.2 Functional Block Diagram......................................... 10 7.3 Feature Description...................................................10 7.4 Device Functional Modes..........................................15 7.5 Programming............................................................ 17 7.6 Register Map.............................................................25 8 Application and Implementation.................................. 36 8.1 Application Information............................................. 36 8.2 Typical Application.................................................... 40 8.3 What to Do and What Not to Do............................... 47 9 Power Supply Recommendations................................48 10 Layout...........................................................................48 10.1 Layout Guidelines................................................... 48 10.2 Layout Example...................................................... 48 11 Device and Documentation Support..........................49 11.1 Documentation Support.......................................... 49 11.2 Receiving Notification of Documentation Updates.. 49 11.3 Support Resources................................................. 49 11.4 Trademarks............................................................. 49 11.5 Electrostatic Discharge Caution.............................. 49 11.6 Glossary.................................................................. 49 12 Mechanical, Packaging, and Orderable Information.................................................................... 49 4 Revision History NOTE: Page numbers for previous revisions may differ from page numbers in the current version. Changes from Revision * (June 2021) to Revision A (September 2021) Page • Changed data sheet status from Advanced Information to Production Data......................................................1 2 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 5 Pin Configuration and Functions SCL 1 6 SDA GND 2 5 INT GND (TEST) 3 4 VCC Not to scale Figure 5-1. DBV Package, 6-Pin SOT-23 (Top View) Table 5-1. Pin Functions PIN NAME NO. TYPE DESCRIPTION SCL 1 IO Serial clock. GND 2 Ground GND (TEST) 3 Input VCC 4 Power supply INT 5 IO Interrupt input/ output. If not used and connected to ground, set MASK_INTB = 1b. SDA 6 IO Serial data. Ground reference. TI Test Pin. Connect to ground in application. Power supply. Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 3 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted)(1) MIN MAX UNIT VCC Main supply voltage –0.3 4 V IOUT Output current, SDA, INT 0 10 mA VOUT Output voltage, SDA, INT –0.3 7 V VIN Input voltage, SCL, SDA, INT –0.3 7 V BMAX Magnetic flux density Unlimited T TJ Junction temperature –40 150 °C Tstg Storage temperature –65 170 °C (1) Stresses beyond those listed under Absolute Maximum Rating may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Condition. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 6.2 ESD Ratings VALUE V(ESD) (1) (2) Electrostatic discharge Human body model (HBM), per ANSI/ESDA/ JEDEC JS-001, all pins(1) ±2000 Charged device model (CDM), per JEDEC specification JS-002, all pins(2) ±500 UNIT V JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) over recommended VCC range (unless otherwise noted) MIN VCC Main supply voltage VOUT Output voltage, SDA, INT IOUT Output current, SDA, INT VIH Input HIGH voltage, SCL, SDA, INT VIL Input LOW voltage, SCL, SDA, INT ΔVCC/Δt(1) Supply voltage ramp rate TA Operating free air temperature (1) NOM MAX UNIT 1.7 3.6 V 0 5.5 V 2 0.7 mA VCC 0.3 3 VCC V/ms –40 125 ℃ If the VCC ramp rate is slower than the recommended supply voltage ramp rate, run a wake-up and sleep cycle after power-up or power-up reset to avoid I2C address glitch during sleep mode. This action is not required while operating in stand-by or continuous modes. 6.4 Thermal Information TMAG5273 THERMAL METRIC(1) DBV (SOT-23) UNIT 6 PINS 4 RθJA Junction-to-ambient thermal resistance 162 °C/W RθJC(top) Junction-to-case (top) thermal resistance 81.6 °C/W RθJB Junction-to-board thermal resistance 50.1 °C/W ΨJT Junction-to-top characterization parameter 30.7 °C/W Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 TMAG5273 THERMAL METRIC(1) UNIT DBV (SOT-23) 6 PINS ΨJB (1) Junction-to-board characterization parameter 49.8 °C/W For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report. 6.5 Electrical Characteristics over operating free-air temperature range (unless otherwise noted) over recommended VCC range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SDA, INT VOL Output LOW voltage, SDA, INT pin IOUT = 2mA IOZ Output leakage current, SDA, INT pin Output disabled, VOZ = 5.5V tFALL_INT INT output fall time RPU =10KΩ, CL =20pF, VPU =1.65V to 5.5V tINT (INT) INT Interrupt time duration during pulse mode tINT (SCL) SCL Interrupt time duration 0 0.4 V ±100 nA 6 ns INT_MODE =001b or 010b 10 µs INT_MODE =011b or 100b 10 µs DC POWER SECTION VCCUV (1) Under voltage threshold at VCC VCC = 2.3V to 3.6V IACTIVE Active mode current X, Y, Z, or thermal sensor active conversion, LP_LN =0b 2.3 mA IACTIVE Active mode current X, Y, Z, or thermal sensor active conversion, LP_LN =1b 3.0 mA ISTANDBY Stand-by mode current Device in trigger mode, no conversion started 0.45 mA ISLEEP Sleep mode current 5 nA 1.9 2.0 2.2 V AVERAGE POWER DURING WAKE-UP AND SLEEP (W&S) MODE ICC_DCM_1000_1 W&S mode current consumption Wake-up interval 1-ms, magnetic 1-ch conversion, LP_LN =0b, VCC =3.3V 160 µA ICC_DCM_1000_1 W&S mode current consumption Wake-up interval 1-ms, magnetic 1-ch conversion, LP_LN =0b, VCC =1.8V 156 µA ICC_DCM_1000_4 W&S mode current consumption Wake-up interval 1-ms, 4-ch conversion, LP_LN =0b, VCC =3.3V 240 µA ICC_DCM_1000_4 W&S mode current consumption Wake-up interval 1-ms, 4-ch conversion, LP_LN =0b, VCC =1.8V 233 µA ICC_DCM_0p2_1 W&S mode current consumption Wake-up interval 5000-ms, magnetic 1-ch conversion, LP_LN =0b, VCC =3.3V 1.21 µA ICC_DCM_0p2_1 W&S mode current consumption Wake-up interval 5000-ms, magnetic 1-ch conversion, LP_LN =0b, VCC =1.8V 1.00 µA ICC_DCM_0p2_4 W&S mode current consumption Wake-up interval 5000-ms, 4-ch conversion, LP_LN =0b, VCC =3.3V 1.22 µA ICC_DCM_0p2_4 W&S mode current consumption Wake-up interval 5000-ms, 4-ch conversion, LP_LN =0b, VCC =1.8V 1.02 µA (1) The DIAG_STATUS and VCC_UV_ER bits are not valid for VCC < 2.3V Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 5 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 6.6 Temperature Sensor over operating free-air temperature range (unless otherwise noted) over recommended VCC range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP TSENS_RANGE Temperature sensing range TADC_T0 Temperature result in decimal value (from 16-bit format) for TSENS_T0 17508 TSENS_T0 Reference temperature for TADC_T0 25 TADC_RES Temp sensing resolution (in 16-bit format) NRMS_T RMS (1 Sigma) temperature noise NRMS_T RMS (1 Sigma) temperature noise (1) –40 MAX UNIT 170(1) ℃ ℃ 60.1 LSB/℃ CONV_AVG = 000b 0.4 ℃ CONV_AVG = 101b 0.2 ℃ TI recommends not to exceed the specified operating free air temperature per the Recommended Operating Conditions table 6.7 Magnetic Characteristics For A1 over operating free-air temperature range (unless otherwise noted) PARAMETER 6 TEST CONDITIONS MIN TYP MAX UNIT BIN_A1_X_Y Linear magnetic range X_Y_RANGE =0b ±40 mT BIN_A1_X_Y Linear magnetic range X_Y_RANGE =1b ±80 mT BIN_A1_Z Linear magnetic range Z_RANGE =0b ±40 mT BIN_A1_Z Linear magnetic range Z_RANGE =1b ±80 mT SENS40_A1 Sensitivity, X, Y, or Z axis ±40 mT range 820 LSB/mT SENS80_A1 Sensitivity, X, Y, or Z axis ±80 mT range 410 LSB/mT SENSER_PC_25C_A1 Sensitivity error, X, Y, Z axis TA =25C SENSER_PC_TEMP_A1 Sensitivity drift from 25C, X, Y, Z axis SENSLER_XY_A1 Sensitivity Linearity Error, X, Y-axis TA =25C ±0.10% SENSLER_Z_A1 Sensitivity Linearity Error, Z axis TA =25C ±0.10% SENSMS_XY_A1 Sensitivity mismatch among X-Y axes TA =25C ±0.50% SENSMS_Z_A1 Sensitivity mismatch among Y-Z, or XTA =25C Z axes ±1.0% SENSMS_DR_XY_A1 Sensitivity mismatch drift X-Y axes SENSMS_DR_Z_A1 Sensitivity mismatch drift Y-Z, or X-Z axes Boff_A1 Offset Boff_TC_A1 Offset drift NRMS_XY_00_000_A1 RMS (1 Sigma) magnetic noise (X or Y-axis) LP_LN =0b, CONV_AVG = 000, TA =25C 125 µT NRMS_XY_01_000_A1 RMS (1 Sigma) magnetic noise (X or Y-axis) LP_LN =1b, CONV_AVG = 000, TA =25C 110 µT NRMS_XY_00_101_A1 RMS (1 Sigma) magnetic noise (X or Y-axis) LP_LN =0b, CONV_AVG = 101, TA =25C 22 µT NRMS_XY_01_101_A1 RMS (1 Sigma) magnetic noise (X or Y-axis) LP_LN =1b, CONV_AVG = 101, TA =25C 22 µT NRMS_Z_00_000_A1 RMS (1 Sigma) magnetic noise (Z axis) LP_LN =0b, CONV_AVG = 000, TA =25C 68 µT NRMS_Z_01_000_A1 RMS (1 Sigma) magnetic noise (Z axis) LP_LN =1b, CONV_AVG = 000, TA =25C 66 µT NRMS_Z_00_101_A1 RMS (1 Sigma) magnetic noise (Z axis) LP_LN =0b, CONV_AVG = 101, TA =25C 11 µT NRMS_Z_01_101_A1 RMS (1 Sigma) magnetic noise (Z axis) LP_LN =1b, CONV_AVG = 101, TA =25C 9 µT ±5.0% ±20.0% ±5.0% ±5% ±15% TA =25C Submit Document Feedback ±300 ±1000 µT ±3.0 ±10.0 µT/°C Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT AERR_Y_Z_101_A1_25 Y-Z Angle error in full 360 degree rotation CONV_AVG = 101, TA =25C ±1.0 Degree AERR_X_Z_101_A1_25 X-Z Angle error in full 360 degree rotation CONV_AVG = 101, TA =25C ±1.0 Degree AERR_X_Y_101_A1_25 X-Y Angle error in full 360 degree rotation CONV_AVG = 101, TA =25C ±0.5 Degree 6.8 Magnetic Characteristics For A2 over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT BIN_A2_X_Y Linear magnetic range X_Y_RANGE =0b ±133 mT BIN_A2_X_Y Linear magnetic range X_Y_RANGE =1b ±266 mT BIN_A2_Z Linear magnetic range Z_RANGE =0b ±133 mT BIN_A2_Z Linear magnetic range Z_RANGE =1b ±266 mT SENS133_A2 Sensitivity, X, Y, or Z axis ±133 mT range 250 LSB/mT SENS266_A2 Sensitivity, X, Y, or Z axis ±266 mT range 125 LSB/mT SENSER_PC_25C_A2 Sensitivity error, X, Y, Z axis TA = 25C SENSER_PC_TEMP_A2 Sensitivity drift from 25C, X, Y, Z axis SENSLER_XY_A2 Sensitivity Linearity Error, X, Y-axis TA =25C ±0.10% SENSLER_Z_A2 Sensitivity Linearity Error, Z axis TA =25C ±0.10% SENSMS_XY_A2 Sensitivity mismatch among X-Y axes TA =25C ±0.50% SENSMS_Z_A2 Sensitivity mismatch among Y-Z, or XTA =25C Z axes ±1.0% SENSMS_DR_XY_A2 Sensitivity mismatch drift X-Y axes SENSMS_DR_Z_A2 Sensitivity mismatch drift Y-Z, or X-Z axes Boff_A2 Offset Boff_TC_A2 Offset drift NRMS_XY_00_000_A2 RMS (1 Sigma) magnetic noise (X or Y-axis) LP_LN =0b, CONV_AVG = 000, TA =25C 147 µT NRMS_XY_01_000_A2 RMS (1 Sigma) magnetic noise (X or Y-axis) LP_LN =1b, CONV_AVG = 000, TA =25C 145 µT NRMS_XY_01_101_A2 RMS (1 Sigma) magnetic noise (X or Y-axis) LP_LN =0b, CONV_AVG = 101, TA =25C 24 µT NRMS_XY_10_101_A2 RMS (1 Sigma) magnetic noise (X or Y-axis) LP_LN =1b, CONV_AVG = 101, TA =25C 24 µT NRMS_Z_00_000_A2 RMS (1 Sigma) magnetic noise (Z axis) LP_LN =0b, CONV_AVG = 000, TA =25C 89 µT NRMS_Z_10_000_A2 RMS (1 Sigma) magnetic noise (Z axis) LP_LN =1b, CONV_AVG = 000, TA =25C 88 µT NRMS_Z_00_101_A2 RMS (1 Sigma) magnetic noise (Z axis) LP_LN =0b, CONV_AVG = 101, TA =25C 15 µT NRMS_Z_10_101_A2 RMS (1 Sigma) magnetic noise (Z axis) LP_LN =1b, CONV_AVG = 101, TA =25C 15 µT AERR_Y_Z_101_A2 Y-Z Angle error in full 360 degree rotation CONV_AVG = 101, TA =25C ±1.0 Degree AERR_X_Z_101_A2 X-Z Angle error in full 360 degree rotation CONV_AVG = 101, TA =25C ±1.0 Degree ±5.0% ±20.0% ±5.0% ±5% ±15% TA =25C ±300 ±1000 ±3.0 ±10 µT µT/°C Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 7 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 over operating free-air temperature range (unless otherwise noted) PARAMETER AERR_X_Y_101_A2 TEST CONDITIONS X-Y Angle error in full 360 degree rotation MIN TYP CONV_AVG = 101, TA =25C MAX ±0.50 UNIT Degree 6.9 Magnetic Temp Compensation Characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT TC_00 Temperature compensation (X, Y, Z-axes) MAG_TEMPCO =00b 0 %/°C TC_12 Temperature compensation (X, Y, Z-axes) MAG_TEMPCO =01b 0.12 %/°C TC_20 Temperature compensation (X, Y, Z-axes) MAG_TEMPCO =11b 0.2 %/°C 6.10 I2C Interface Timing over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT I2C Interface Fast Mode Plus (VCC =2.3V to 3.6V) LOAD = 50 pF, VCC =2.3V to 3.6V fI2C_fmp I2C clock (SCL) frequency 1000 KHz twhigh_fmp High time: SCL logic high time duration 350 ns twlo_wfmp Low time: SCL logic low time duration 500 ns tsu_cs_fmp SDA data setup time 50 ns th_cs_fmp SDA data hold time 120 ticr_fmp SDA, SCL input rise time ticf_fmp SDA, SCL input fall time th_ST_fmp Start condition hold time 0.1 µs tsu_SR_fmp Repeated start condition setup time 0.1 µs tsu_SP_fmp Stop condition setup time 0.1 µs tw_SP_SR_fmp Bus free time between stop and start condition 0.2 µs ns 120 55 ns ns I2C Interface Fast Mode (VCC =1.7V to 3.6V) LOAD = 50 pF, VCC =1.7V to 3.6V fI2C I2C clock (SCL) frequency 400 KHz twhigh High time: SCL logic high time duration twlow Low time: SCL logic low time duration tsu_cs SDA data setup time th_cs SDA data hold time ticr SDA, SCL input rise time 300 ns ticf SDA, SCL input fall time 300 ns th_ST Start condition hold time 0.3 µs tsu_SR Repeated start condition setup time 0.3 µs tsu_SP Stop condition setup time 0.3 µs tw_SP_SR Bus free time between stop and start condition 0.6 µs 600 ns 1300 ns 100 ns 0 ns 6.11 Power up & Conversion Time over operating free-air temperature range (unless otherwise noted) PARAMETER 8 TEST CONDITIONS tstart_power_up Time to go to stand-by mode after VCC supply voltage crossing VCC_MIN tstart_sleep Time to go to stand-by mode from sleep mode(1) Submit Document Feedback MIN TYP MAX UNIT 270 µs 50 µs Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS tstart_measure Time to go into continuous measure mode from stand-by mode tmeasure Conversion time(2) tmeasure Conversion time(3) tgo_sleep Time to go into sleep mode after SCL goes high (1) MIN TYP MAX UNIT 70 µs CONV_AVG = 000b, OPERATING_MODE =10b, only one channel enabled 50 µs CONV_AVG = 101b, OPERATING_MODE =10b, only one channel enabled 825 µs 20 µs The device will recognize the I2C communication from a primary only during stand-by or continuous measure modes. While the device is in sleep mode, a valid secondary address will wake up the device but no acknowledge will be sent to the primary. Start up time must be considered before addressing the device after wake up. Add 25µs for each additional magnetic channel enabled for conversion with CONV_AVG = 000b. When CONV_AVG = 000b, the conversion time doesn't change with the T_CH_EN bit setting. For conversion with CONV_AVG =101b, each channel data is collected 32 times. If an additional channel is enabled with CONV_AVG =101b, add 32×25µs = 800µs to the tmeasure to calculate the conversion time for two channels. (2) (3) 6.12 Typical Characteristics 0.6 3 0.5 2.5 0.4 2 Current (mA) Current (mA) at TA = 25°C typical (unless otherwise noted) 0.3 0.2 0.1 0 -40 0 20 40 60 Temperature (C) 80 100 0 -40 120 Figure 6-1. Standby Mode ICC vs. Temperature Vcc = 1.8 V Vcc = 3.3 V -20 0 20 40 60 Temperature (C) 80 100 120 Figure 6-2. Active Mode ICC vs. Temperature 16 25 VCC = 1.8 V VCC = 3.3 V TXYZ Selected, VCC = 1.8 V TX Selected, VCC = 1.8 V TXYZ Selected, VCC = 3.3 V TX Selected, VCC = 3.3 V 14 20 12 ICC Current (A) ICC Current (nA) 1 0.5 Vcc = 1.8 V Vcc = 3.3 V -20 1.5 15 10 10 8 6 4 5 0 -40 2 -20 0 20 40 60 80 Temperature (C) 100 120 140 Figure 6-3. Sleep Mode ICC vs. Temperature 0 20 1020 2020 3020 Sleep-time (ms) 4020 5020 Figure 6-4. Average ICC vs. W&S Mode Sleep Time Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 9 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 7 Detailed Description 7.1 Overview The TMAG5273 IC is based on the Hall-effect technology and precision mixed signal circuitry from Texas Instruments. The output signals (raw X, Y, Z magnetic data and temperature data) are accessible through the I2C interface. The IC consists of the following functional and building blocks: • The Power Management & Oscillator block contains a low-power oscillator, biasing circuitry, undervoltage detection circuitry, and a fast oscillator. • The sensing and temperature measurement block contains the Hall biasing, Hall sensors with multiplexers, noise filters, integrator circuit, temperature sensor, and the ADC. The Hall-effect sensor data and temperature data are multiplexed through the same ADC. • The Interface block contains the I2C control circuitry, ESD protection circuits, and all the I/O circuits. The TMAG5273 supports multiple I2C read frames along with integrated cyclic redundancy check (CRC). 7.2 Functional Block Diagram VCC SCL Power Management and Oscillator Result Registers Z X + MUX TEST Gain and Filtering ADC Interface SDA Y – Config Registers Temperature sensor INT Digital Core GND 7.3 Feature Description 7.3.1 Magnetic Flux Direction As shown in Figure 7-1, the TMAG5273 will generate positive ADC codes in response to a magnetic north pole in the proximity. Similarly, the TMAG5273 will generate negative ADC codes if magnetic south poles approach from the same directions. 10 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 S S XA xis Z Axis N N Y Ax is 1 2 N S 3 Figure 7-1. Direction of Sensitivity 7.3.2 Sensor Location Figure 7-2 shows the location of X, Y, Z hall elements inside the TMAG5273. 1.85-mm Y X Z 0.73-mm 0.68-mm Figure 7-2. Location of X, Y, Z Hall Elements 7.3.3 Interrupt Function The TMAG5273 supports flexible and configurable interrupt functions through either the INT or the SCL pin. Table 7-1 shows different conversion completion events where result registers and SET_COUNT bits update, and where they do not. Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 11 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Table 7-1. Result Register & SET_COUNT Update After Conversion Completion INT_MODE MODE DESCRIPTION 000b 001b I2C BUS BUSY, NOT TALKING TO DEVICE I2C BUS BUSY & TALKING TO DEVICE I2C BUS NOT BUSY RESULT UPDATE? RESULT UPDATE? RESULT UPDATE? SET_COUNT UPDATE? SET_COUNT UPDATE? SET_COUNT UPDATE? No interrupt Yes Yes No No Yes Yes Interrupt through INT Yes Yes No No Yes Yes 010b Interrupt through INT except when I2C busy Yes Yes No No Yes Yes 011b Interrupt through SCL Yes Yes No No Yes Yes 100b Interrupt through SCL except when I2C busy No No No No Yes Yes Note I2C TI does not recommend sharing the same bus with multiple secondary devices when using the SCL pin for interrupt function. The SCL interrupt may corrupt transactions with other secondary devices if present in the same I2C bus. Interrupt Through SCL Figure 7-3 shows an example for interrupt function through the SCL pin with the device programmed to wake up and sleep mode for threshold cross at a predefined intervals. The wake-up intervals can be set through the SLEEPTIME bits. Once the magnetic threshold cross is detected, the device asserts a fixed width interrupt signal through the SCL pin, and goes back to stand-by mode. Wake-up & Sleep Mode Standby Mode Operating Mode X Ch Threshold X Magnetic Field Interrupt through SCL Time Figure 7-3. Interrupt Through SCL 12 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Fixed Width Interrupt Through INT Figure 7-4 shows an example for fixed-width interrupt function through the INT pin. The device is programmed to be in wake-up and sleep mode to detect a magnetic threshold. The INT_STATE register bit is set 1b. Once the magnetic threshold cross is detected, the device asserts a fixed width interrupt signal through the INT pin, and goes back to stand-by mode. Wake-up & Sleep Mode Standby Mode Operating Mode X Ch Threshold X Magnetic Field Interrupt through INT (Fixed Width) SCL Line Time Figure 7-4. Fixed Width Interrupt Through INT Latched Interrupt Through INT Figure 7-5 shows an example for latched interrupt function through the INT pin. The device is programmed to be in wake-up and sleep mode to detect a magnetic threshold. The INT_STATE register bit is set 0b. Once the magnetic threshold cross is detected, the device asserts a latched interrupt signal through the INT pin, and goes back to stand-by mode. The interrupt latch is cleared only after the device receives a valid address through the SCL line. Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 13 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Wake-up & Sleep Mode Standby Mode Operating Mode X Ch Threshold X Magnetic Field Interrupt through INT (Latched) SCL Line Time Figure 7-5. Latched Interrupt Through INT 7.3.4 Device I2C Address Table 7-2 shows the default factory programmed I2C addresses of the TMAG5273. The device needs to be addressed with the factory default I2C address after power up. If required, a primary can assign a new I2C address through the I2C_ADDRESS register bits after power up. Table 7-2. I2C Default Address DEVICE VERSION MAGNETIC RANGE I2C READ ADDRESS (8BIT) TMAG5273A1 35h 6Ah 6Bh TMAG5273B1 22h 44h 45h TMAG5273C1 ±40 mT, ±80 mT 78h F0h F1h TMAG5273D1 44h 88h 89h TMAG5273A2 35h 6Ah 6Bh TMAG5273B2 22h 44h 45h 78h F0h F1h 44h 88h 89h TMAG5273C2 ±133 mT, ±266 mT TMAG5273D2 14 I2C ADDRESS (7 MSB BITS) I2C WRITE ADDRESS (8-BIT) Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 7.3.5 Magnetic Range Selection Table 7-3 shows the magnetic range selection for the TMAG5273 device. The X, Y, and Z axes range can be selected with the X_Y_RANGE and Z_RANGE register bits. Table 7-3. Magnetic Range Selection RANGE REGISTER SETTING TMAG5273A1 TMAG5273A2 X_Y_RANGE = 0b ±40-mT ±133-mT X_Y_RANGE = 1b ±80-mT ±266-mT Z_RANGE = 0b ±40-mT ±133-mT Z_RANGE = 1b ±80-mT ±266-mT X, Y Axis Field Z Axis Field COMMENT Better SNR performance Better SNR performance 7.3.6 Update Rate Settings The TMAG5273 offers multiple update rates to offer design flexibility to system designers. The different update rates can be selected with the CONV_AVG register bits. Table 7-4 shows different update rate settings for the TMAG5273. Table 7-4. Update Rate Settings OPERATING MODE REGISTER SETTING X, Y, Z Axis UPDATE RATE SINGLE AXIS TWO AXES THREE AXES CONV_AVG = 000b 20.0-kSPS 13.3-kSPS 10.0-kSPS X, Y, Z Axis CONV_AVG = 001b 13.3-kSPS 8.0-kSPS 5.7-kSPS X, Y, Z Axis CONV_AVG = 010b 8.0-kSPS 4.4-kSPS 3.1-kSPS X, Y, Z Axis CONV_AVG = 011b 4.4-kSPS 2.4-kSPS 1.6-kSPS X, Y, Z Axis CONV_AVG = 100b 2.4-kSPS 1.2-kSPS 0.8-kSPS X, Y, Z Axis CONV_AVG = 101b 1.2-kSPS 0.6-kSPS 0.4-kSPS COMMENT Fastest update rate Best SNR case 7.4 Device Functional Modes The TMAG5273 supports multiple functional modes for wide array of applications as explained in Figure 7-6. A specific functional mode is selected by setting the corresponding value in the OPERATING_MODE register bits. The device starts powering up after VCC supply crosses the minimum threshold as specified in the Recommended Operating Condition (ROC) table. 7.4.1 Stand-by (Trigger) Mode The TMAG5273 goes to stand-by mode after first time powering up. At this mode the digital circuitry and oscillators are on, and the device is ready to accept commands from the primary device. Based off the commands the device can start a sensor data conversion, go to power saving mode, or start data transfer through I2C interface. A new conversion can be triggered through I2C command or through INT pin. In this mode the device retains the immediate past conversion result data in the corresponding result registers. The time it takes for the device to go to stand-by mode from power up is denoted by Tstart_power_up. 7.4.2 Sleep Mode The TMAG5273 supports an ultra-low power sleep mode where it retains the critical user configuration settings. In this mode the device doesn't retain the conversion result data. A primary can wake up the device from sleep mode through I2C communications or the INT pin. The time it takes for the device to go to stand-by mode from sleep mode is denoted by Tstart_sleep. 7.4.3 Wake-up and Sleep (W&S) Mode In this mode the TMAG5273 can be configured to go to sleep and wake up at a certain interval, and measure sensor data based off the SLEEPTIME register bits setting. The device can be set to generate an interrupt through the INT_CONFIG_1 register. Once the conversion is complete and the interrupt condition is met, the TMAG5273 will exit the W&S mode and go to the stand-by mode. The last measured data will be stored in the Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 15 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 corresponding result registers before the device goes to the stand-by mode. If the interrupt condition isn't met, the device will continue to be in the W&S mode to wake up and measure data at the specified interval. A primary can wake up the TMAG5273 anytime during the W&S mode through I2C bus or INT pin. The time it takes for the device to go to stand-by mode from W&S mode is denoted by Tstart_sleep. 7.4.4 Continuous Measure Mode In this mode the TMAG5273 continuously measures the sensor data per SENSOR_CONFIG & DEVICE_CONFIG register settings. In this mode the result registers can be accessed through the I2C lines. The time it takes for the device to go from stand-by mode to continuous measure mode is denoted by Tstart_measure. Device Startup: (VCC crossing MIN threshold specified in the ROC table) Sleep Mode Wake-up & Sleep Mode Tstart_power_up Tstart_sleep Tgo_sleep Stand-by (Trigger) Mode Tstart_measure Continuous Measure Mode Figure 7-6. TMAG5273 Power-Up Sequence Table 7-5 shows different device operational modes of the TMAG5273. Table 7-5. Operating Modes OPERATING MODE DEVICE FUNCTION ACCESS TO USER REGISTERS RETAIN USER CONFIGURATION COMMENT Continuous Measure Mode Continuously measuring x, y, z axis, or temperature data Yes Yes Stand-by Mode Device is ready to accept I2C commands and start active conversion Yes Yes Wake-up and Sleep Mode Wakes up at a certain interval to measure the x, y, z axis, or temperature data No Yes 1, 5, 10, 15, 20, 30, 50, 100, 500, 1000, 2000, 5000, & 20000-ms intervals supported. Sleep Mode Device retains key configuration settings, but doesn't retain the measurement data Yes Sleep mode can be utilized by a primary device to implement other power saving intervals not supported by wake-up and sleep mode. 16 No Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 7.5 Programming 7.5.1 I2C Interface The TMAG5273 offers I2C interface, a two-wire interface to connect low-speed devices like microcontrollers, A/D and D/A converters, I/O interfaces and other similar peripherals in embedded systems. 7.5.1.1 SCL SCL is the clock line. It is used to synchronize all data transfers over the I2C bus. 7.5.1.2 SDA SDA is the bidirectional data line for the I2C interface. 7.5.1.3 I2C Read/Write The TMAG5273 supports multiple I2C read and write frames targeting different applications. I2C_RD and CRC_EN bits offers multiple read frames to optimize the read time, data resolution and data integrity for a select application. 7.5.1.3.1 Standard I2C Write Figure 7-7 shows an example of standard I2C two byte write command supported by TMAG5273. The starting byte contains 7-bit secondary device address and a '0' at the R/W command bit. The MSB of the second byte contains the conversion trigger bit. Writing '1' at this trigger bit will start a new conversion after the register address decoding is completed. The 7 LSB bits of the second byte contains the starting register address for the write command. After the two command bytes, the primary device starts to send the data to be written at the corresponding register address. Each successive write byte will send the data for the successive register address in the secondary device. Primary Data Secondary Data ACK from Secondary No ACK from Primary ACK from Primary Start/ Stop from Primary Conversion Trigger Data[Reg_Add] Register address Data[Reg_Add+1] Data[Reg_Add+n] Stop R/W Start 0 Secondary address Figure 7-7. Standard I2C Write 7.5.1.3.2 General Call Write Figure 7-8 shows an example of the general call I2C write command supported by the TMAG5273. This command is useful to configure multiple I2C devices in a I2C bus simultaneously. The starting byte contains 8-bit '0's. The MSB of the second byte contains the conversion trigger bit. Writing '1' at this trigger bit will start a new conversion after the register address decoding is completed. The 7 LSB bits of the second byte contains the starting register address for the write command. After the two command bytes, the primary device starts to send the data to be written at the corresponding register address of all the secondary devices in the I2C bus. Each successive write byte will send the data for the successive register address in the secondary devices. Primary Data ACK from Secondary No ACK from Primary Secondary Data ACK from Primary Start/ Stop from Primary Conversion Trigger Register address Data[Reg_Add] Data[Reg_Add+1] Data[Reg_Add+N] Stop General call address R/W Start 0 0 0 0 0 0 0 0 Figure 7-8. General Call I2C Write 7.5.1.3.3 Standard 3-Byte I2C Read Figure 7-9 and Figure 7-10 show examples of standard I2C three byte read command supported by the TMAG5273. The starting byte contains 7-bit secondary device address and the R/W command bit '0'. The MSB of the second byte contains the conversion trigger command bit. Writing '1' at this trigger bit will start a Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 17 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 new conversion after the register address decoding is completed. The 7 LSB bits of the second byte contains the starting register address for the write command. After receiving ACK signal from secondary, the primary send the secondary address once again with R/W command bit as '1'. The secondary starts to send the corresponding register data. It will send successive register data with each successive ACK from primary. If CRC is enabled, the secondary will send the fifth CRC byte based off the CRC calculation of immediate past 4 register bytes. Note In the standard 3-byte read command the TMAG5273 doesn't support CRC if the data length is more than 4 byte. Initiate successive read commands for larger data stream requiring CRC. Primary Data ACK from Secondary No ACK from Primary Secondary Data ACK from Primary Start/ Stop from Primary Data[Reg_Add] Data[Reg_Add+1] Data[Reg_Add+n] Stop Secondary address R/W ReStart 1 Register address R/W Start 0 Secondary address Conversion Trigger Figure 7-9. Standard 3-Byte I2C Read With CRC Disabled, CRC_EN = 0b Primary Data ACK from Secondary No ACK from Primary Secondary Data Conversion Trigger ACK from Primary CRC Secondary address R/W ReStart 1 Register address Data[Reg_Add] Data[Reg_Add+1] Data[Reg_Add+2] Stop Data[Reg_Add+3] R/W Start 0 Secondary address Start/ Stop from Primary Figure 7-10. Standard 3-Byte I2C Read With CRC Enabled, CRC_EN = 1b 7.5.1.3.4 1-Byte I2C Read Command for 16-Bit Data Figure 7-11 and Figure 7-12 show examples of 1-byte I2C read command supported by the TMAG5273. Select I2C_RD =01b to enable this mode. The command byte contains 7-bit secondary device address and a '1' at the R/W bit. In this mode, per MAG_CH_EN and T_CH_EN bits setting, the device will send 16-bit data of the enabled channels and the CONV_STATUS register data byte. If CRC is enabled, the device will send an additional CRC byte based off the CRC calculation of the command byte and the data sent in the current packet. When multiple channels are enabled, the sent data follows the T, X, Y, and Z sequence in the successive data bytes. 18 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Primary Data ACK from Secondary No ACK from Primary Secondary Data ACK from Primary Start/ Stop from Primary Data[Axis1_MSB] Data[Axis1_LSB] Data[CONV_STATUS] Stop R/W Start 1 Secondary address Single Axis Measurement Example,. X or Y or Z Data[Axis1_LSB] Data[Axis2_MSB] Data[Axis2_LSB] Data[CONV_STATUS] Data[Y_MSB] Data[Y_LSB] Data[Z_MSB] Data[Z_LSB] Data[X_MSB] Data[X_LSB] Data[Y_MSB] Data[Y_LSB] Stop Data[Axis1_MSB] R/W Start 1 Secondary address Two Axes Measurement Example, XY or YZ or XZ Data[X_MSB] R/W Start 1 Secondary address Stop Data[CONV_STATUS] Data[X_LSB] Three Axes Measurement Example, XYZ Data[Z_MSB] Data[T_LSB] Data[Z_LSB] Data[CONV_STATUS] Stop Data[T_MSB] R/W Start 1 Secondary address All Sensors Measurement Example, TXYZ Figure 7-11. 1-Byte I2C Read Command for 16-Bit Data With CRC Disabled, CRC_EN = 0b Primary Data ACK from Secondary No ACK from Primary Secondary Data ACK from Primary Start/ Stop from Primary Data[Axis1_MSB] Data[Axis1_LSB] Data[CONV_STATUS] CRC Data[Axis2_MSB] Data[Axis2_LSB] Data[CONV_STATUS] CRC Data[Y_MSB] Data[Y_LSB] Data[Z_MSB] Data[Z_LSB] Data[Y_MSB] Data[Y_LSB] Data[Z_MSB] Data[Z_LSB] Stop R/W Start 1 Secondary address Single Axis Measurement Example,. X or Y or Z Data[Axis1_MSB] Data[Axis1_LSB] Stop R/W Start 1 Secondary address Two Axes Measurement Example, XY or YZ or XZ Data[CONV_STATUS] Data[X_MSB] CRC Data[X_LSB] Stop R/W Start 1 Secondary address Three Axes Measurement Example, XYZ Data[T_MSB] CRC Data[T_LSB] Stop Data[CONV_STATUS] R/W Start 1 Secondary address Three Axes Measurement Example, TYZ Figure 7-12. 1-Byte I2C Read Command for 16-Bit Data With CRC Enabled, CRC_EN = 1b Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 19 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Note In the 1-byte read command for 16-bit data only up to 3 channels data can be sent when CRC is enabled. This restriction doesn't apply if CRC is disabled. 7.5.1.3.5 1-Byte I2C Read Command for 8-Bit Data Figure 7-13 and Figure 7-14 show examples of 1-byte I2C read command supported by the TMAG5273. Select I2C_RD =10b to enable this mode. The command byte contains 7-bit secondary device address and a '1' at the R/W bit. In this mode, per MAG_CH_EN and T_CH_EN bits setting, the device will send 8-bit data of the enabled channels and the CONV_STATUS register data byte. If CRC is enabled, the device will send an additional CRC byte based off the CRC calculation of the command byte and the data sent in the current packet. When multiple channels are enabled, the sent data follows the T, X, Y, and Z sequence in the successive data bytes. Primary Data ACK from Secondary No ACK from Primary Secondary Data ACK from Primary Start/ Stop from Primary Data[Axis1_MSB] Data[CONV_STATUS] Stop R/W Start 1 Secondary address Single Axis Measurement Example,. X or Y or Z Data[Axis1_MSB] Data[Axis2_MSB] Data[CONV_STATUS] Stop Secondary address R/W Start 1 Two Axes Measurement Example, XY or YZ or XZ Data[X_MSB] Data[Y_MSB] Data[Z_MSB] Data[CONV_STATUS] Stop R/W Start 1 Secondary address Three Axes Measurement Example, XYZ Data[T_MSB] Data[X_MSB] Data[Y_MSB] Data[Z_MSB] Data[CONV_STATUS] Stop Secondary address R/W Start 1 All Sensors Measurement Example, TXYZ Figure 7-13. 1-Byte I2C Read Command for 8-Bit Data With CRC Disabled, CRC_EN = 0b 20 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Primary Data ACK from Secondary No ACK from Primary Secondary Data ACK from Primary Start/ Stop from Primary Data[Axis1_MSB] Data[CONV_STATUS] CRC Stop R/W Start 1 Secondary address Single Axis Measurement Example, X or Y or Z Data[Axis1_MSB] Data[Axis2_MSB] Data[CONV_STATUS] CRC Stop R/W Start 1 Secondary address Two Axes Measurement Example, XY or YZ or XZ Data[X_MSB] Data[Y_MSB] Data[Z_MSB] Data[CONV_STATUS] CRC Stop R/W Start 1 Secondary address Three Axes Measurement Example, XYZ Data[T_MSB] Data[X_MSB] Data[Y_MSB] Data[Z_MSB] Data[CONV_STATUS] CRC Stop R/W Start 1 Secondary address Three Axes & Temperature Measurement Example, TXYZ Figure 7-14. 1-Byte I2C Read Command for 8-Bit Data With CRC Enabled, CRC_EN = 1b Note In the 1-byte read command for 8-bit data any combinations of channels can be sent without restrictions. 7.5.1.3.6 I2C Read CRC The TMAG5273 supports optional CRC during I2C read. The CRC can be enabled through the CRC_EN register bit. The CRC is performed on a data string that is determined by the I2C read type. The CRC information is sent as a single byte after the data bytes. The code is generated by the polynomial x8 + x2 + x + 1. Initial CRC bits are FFh. The following equations can be employed to calculate CRC: d = Data Input, c = Initial CRC (FFh) (1) newcrc[0] = d[7] ^ d[6] ^ d[0] ^ c[0] ^ c[6] ^ c[7] (2) newcrc[1] = d[6] ^ d[1] ^ d[0] ^ c[0] ^ c[1] ^ c[6] (3) newcrc[2] = d[6] ^ d[2] ^ d[1] ^ d[0] ^ c[0] ^ c[1] ^ c[2] ^ c[6] (4) newcrc[3] = d[7] ^ d[3] ^ d[2] ^ d[1] ^ c[1] ^ c[2] ^ c[3] ^ c[7] (5) newcrc[4] = d[4] ^ d[3] ^ d[2] ^ c[2] ^ c[3] ^ c[4] (6) newcrc[5] = d[5] ^ d[4] ^ d[3] ^ c[3] ^ c[4] ^ c[5] (7) newcrc[6] = d[6] ^ d[5] ^ d[4] ^ c[4] ^ c[5] ^ c[6] (8) newcrc[7] = d[7] ^ d[6] ^ d[5] ^ c[5] ^ c[6] ^ c[7] (9) The following examples show calculated CRC byte based off various input data: I2C Data 00h : CRC = F3h I2C Data FFh : CRC = 00h I2C Data 80h : CRC = 7Ah Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 21 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 I2C Data 4Ch : CRC = 10h I2C Data E0h : CRC = 5Dh I2C Data 00000000h : CRC = D1h I2C Data FFFFFFFFh : CRC = 0Fh 7.5.2 Data Definition 7.5.2.1 Magnetic Sensor Data The X, Y, and Z magnetic sensor data are stored in x_MSB_RESULT and x_LSB_RESULT registers. Figure 7-15 shows that each sensor output stored in a 16-bit 2's complement format in two 8-bit registers. The data can be retrieved as 16-bit format combining both MSB and LSB registers, or as 8-bit format through the MSB register. x_MSB_RESULT D03 D02 D01 D00 D04 D07 D06 D05 D11 D10 D09 D08 D12 D15 D14 D13 x_LSB_RESULT Figure 7-15. Magnetic Sensor Data Definition The measured magnetic field can be calculated using Equation 10 for 16-bit data, and using Equation 11 for 8-bit data. where • • • B= i − D15 × 215 + ∑14 i = 0 Di × 2 × 2 BR 216 (10) B is magnetic field in mT. Di is the data bit shown in Figure 7-15. BR is the magnetic range in mT for the corresponding channel. B= 6 − D15 × 27 + ∑i = 0 Di + 8 × 2i × 2 BR 28 (11) 7.5.2.2 Temperature Sensor Data The TMAG5273 will measure temperature from –40 °C to 170 °C. The temperature sensor data are stored in T_MSB_RESULT and T_LSB_RESULT registers. Figure 7-16 shows the sensor output stored in a 16-bit 2's complement format in two 8-bit registers. The data can be retrieved as 16-bit format combining both MSB and LSB registers, or as 8-bit format through the MSB register. 22 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 T_MSB_RESULT D03 D02 D01 D00 D04 D07 D06 D05 D11 D10 D09 D08 D12 D15 D14 D13 T_LSB_RESULT Figure 7-16. Temperature Sensor Data Definition The measured temperature in degree Celsius can be calculated using Equation 12 for 16-bit data, and using Equation 13 for 8-bit data. where • • • • • T − TADC_T0 T = TSENS_T0 + ADC_T T (12) ADC_RES T is the measured temperature in degree Celsius. TSENS_T0 as listed in the Electrical Characteristics table. TADC_RES is the change in ADC code per degree Celsius. TADC_T0 as listed in the Electrical Characteristics table. TADC_T is the measured ADC code for temperature T. T 256 × TADC_T − ADC_T0 256 T = TSENS_T0 + TADC_RES (13) 7.5.2.3 Angle and Magnitude Data Definition The TMAG5273 calculates the angle from a pair of magnetic axes based off the ANGLE_EN register bits setting. Figure 7-17 shows the angle information stored in the ANGLE_RESULT_MSB and ANGLE_RESULT_LSB registers. Bits D04-D12 store angle integer value from 0 to 360 degree. Bits D00-D03 store fractional angle value. The 3-MSB bits are always populated as b000. The angle can be calculated using Equation 14. 3 where • • i − 4 ∑i = 0 Di × 2 A = ∑12 + i = 4 Di × 2 16 i (14) A is the angle measured in degree. Di is the data bit as shown in Figure 7-17. For example: a 354.50 degree is populated as 0001 0110 0010 1000b and a 17.25 degree is populated as 000 0001 0001 0100b. Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 23 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Reserved bits 9-bit Angle integer value 4-bit Angle fraction value D03 D02 D01 D00 D04 D07 D06 D05 D11 D10 D09 D08 D12 D15 D14 D13 0 0 0 Figure 7-17. Angle Data Definition During the angle calculation, use Equation 15 to calculate the resultant vector magnitude. where • M = MADCCℎ12 + MADCCℎ22 (15) MADCCh1, MADCCh2 are the ADC codes of the two magnetic channels selected for the angle calculation. Figure 7-18 shows the magnitude value stored in the MAGNITUDE_RESULT register. For on-axis angular measurement the magnitude value should remain constant across the full 360° measurement. D03 D02 D01 D00 D04 D07 D06 D05 MAGNITUDE_RESULT Figure 7-18. Magnitude Result Data Definition 7.5.2.4 Magnetic Sensor Offset Correction The TMAG5273 enables offset correction for a pair of magnetic axes (see Figure 7-19). The MAG_OFFSET_CONFIG_1 and MAG_OFFSET_CONFIG_2 registers store the offset values to be corrected in 2's complement data format. As an example, if the uncorrected waveform for a particular axis has a value that is +2 mT too high, the offset correction value of -2 mT should be entered in the corresponding offset correction register. The selection and order of the sensors are defined in the ANGLE_EN register bits setting. The default value of these offset correction registers are set as zero. 24 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 ΔOffset 0-mT Reference Axis Figure 7-19. Magnetic Sensor Data Offset Correction The amount of offset for each axis can be calculated using Equation 16. As an example, with a ±40mT range, MAG_OFFSET_CONFIG_1 set at 1000 0000b, and MAG_OFFSET_CONFIG_2 set at 0001 0000b, the offset correction for the first axis is −2.5mT and second axis is 0.312mT. where • • • ∆Offset = 6 − D7 × 27 + ∑i = 0 Di × 2i × 2 BR 12 2 (16) ΔOffset is the amount of offset correction to be applied in mT. Di is the data bit in the MAG_OFFSET_CONFIG_1 or MAG_OFFSET_CONFIG_2 register. BR is the magnetic range in mT for the corresponding channel. Alternately values for MAG_OFFSET_CONFIG_1 or MAG_OFFSET_CONFIG_2 can be calculated for a target offset correction using Equation 17. where • • • MAG_OFFSET  =   212 × ∆ Offset 2 BR (17) MAG_OFFSET is the decimal value to be entered in the MAG_OFFSET_CONFIG_1 or MAG_OFFSET_CONFIG_2 register. ΔOffset is the amount of offset correction to be applied in mT. BR is the magnetic range in mT for the corresponding channel. 7.6 Register Map 7.6.1 TMAG5273 Registers Table 7-6 lists the TMAG5273 registers. All register offset addresses not listed in Table 7-6 should be considered as reserved locations and the register contents should not be modified. Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 25 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 User Configuration Registers Table 7-6. TMAG5273 Registers Offset Acronym Register Name 0h DEVICE_CONFIG_1 Configure Device Operation Modes Section Go 1h DEVICE_CONFIG_2 Configure Device Operation Modes Go 2h SENSOR_CONFIG_1 Sensor Device Operation Modes Go 3h SENSOR_CONFIG_2 Sensor Device Operation Modes Go 4h X_THR_CONFIG X Threshold Configuration Go 5h Y_THR_CONFIG Y Threshold Configuration Go 6h Z_THR_CONFIG Z Threshold Configuration Go 7h T_CONFIG Temp Sensor Configuration Go 8h INT_CONFIG_1 Configure Device Operation Modes Go 9h MAG_GAIN_CONFIG Configure Device Operation Modes Go Ah MAG_OFFSET_CONFIG_1 Configure Device Operation Modes Go Bh MAG_OFFSET_CONFIG_2 Configure Device Operation Modes Go Ch I2C_ADDRESS I2C Address Register Go Dh DEVICE_ID ID for the device die Go Eh MANUFACTURER_ID_LSB Manufacturer ID lower byte Go Fh MANUFACTURER_ID_MSB Manufacturer ID upper byte Go 10h T_MSB_RESULT Conversion Result Register Go 11h T_LSB_RESULT Conversion Result Register Go 12h X_MSB_RESULT Conversion Result Register Go 13h X_LSB_RESULT Conversion Result Register Go 14h Y_MSB_RESULT Conversion Result Register Go 15h Y_LSB_RESULT Conversion Result Register Go 16h Z_MSB_RESULT Conversion Result Register Go 17h Z_LSB_RESULT Conversion Result Register Go 18h CONV_STATUS Conversion Status Register Go 19h ANGLE_RESULT_MSB Conversion Result Register Go 1Ah ANGLE_RESULT_LSB Conversion Result Register Go 1Bh MAGNITUDE_RESULT Conversion Result Register Go 1Ch DEVICE_STATUS Device_Diag Status Register Go Complex bit access types are encoded to fit into small table cells. Table 7-7 shows the codes that are used for access types in this section. Table 7-7. TMAG5273 Access Type Codes Access Type Code Description R Read W W Write W1CP W 1C P Write 1 to clear Requires privileged access Read Type R Write Type Reset or Default Value -n 26 Value after reset or the default value Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 7.6.1.1 DEVICE_CONFIG_1 Register (Offset = 0h) [Reset = 0h] DEVICE_CONFIG_1 is shown in Table 7-8. Return to the Summary Table. Table 7-8. DEVICE_CONFIG_1 Register Field Descriptions Bit Field Type Reset Description CRC_EN R/W 0h Enables I2C CRC byte to be sent 0h = CRC disabled 1h = CRC enabled 6-5 MAG_TEMPCO R/W 0h Temperature coefficient of the magnet 0h = 0% (No temperature compensation) 1h = 0.12%/ deg C (NdBFe) 2h = Reserved 3h = 0.2%/deg C (Ceramic) 4-2 CONV_AVG R/W 0h Enables additional sampling of the sensor data to reduce the noise effect (or to increase resolution) 0h = 1x average, 10.0-kSPS (3-axes) or 20-kSPS (1 axis) 1h = 2x average, 5.7-kSPS (3-axes) or 13.3-kSPS (1 axis) 2h = 4x average, 3.1-kSPS (3-axes) or 8.0-kSPS (1 axis) 3h = 8x average, 1.6-kSPS (3-axes) or 4.4-kSPS (1 axis) 4h = 16x average, 0.8-kSPS (3-axes) or 2.4-kSPS (1 axis) 5h = 32x average, 0.4-kSPS (3-axes) or 1.2-kSPS (1 axis) 1-0 I2C_RD R/W 0h Defines the I2C read mode 0h = Standard I2C 3-byte read command 1h = 1-byte I2C read command for 16bit sensor data and conversion status 2h = 1-byte I2C read command for 8 bit sensor MSB data and conversion status 3h = Reserved 7 7.6.1.2 DEVICE_CONFIG_2 Register (Offset = 1h) [Reset = 0h] DEVICE_CONFIG_2 is shown in Table 7-9. Return to the Summary Table. Table 7-9. DEVICE_CONFIG_2 Register Field Descriptions Bit Field Type Reset Description 7-5 THR_HYST R/W 0h Select thresholds for the interrupt function 0h = Takes the 2's complement value of each x_THR_CONFIG register to create a magnetic threshold of the corresponding axis 1h = Takes the 7 LSB bits of the x_THR_CONFIG register to create two opposite magnetic thresholds (one north, and another south) of equal magnitude. 2h = Reserved 3h = Reserved 4h = Reserved 5h = Reserved 6h = Reserved 7h = Reserved 4 LP_LN R/W 0h Selects the modes between low active current or low-noise modes 0h = Low active current mode 1h = Low noise mode 3 I2C_GLITCH_FILTER R/W 0h I2C glitch filter 0h = Glitch filter on 1h = Glitch filter off Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 27 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Table 7-9. DEVICE_CONFIG_2 Register Field Descriptions (continued) Bit 2 1-0 Field Type Reset Description TRIGGER_MODE R/W 0h Selects a condition which initiates a single conversion based off already configured registers. A running conversion completes before executing a trigger. Redundant triggers are ignored. TRIGGER_MODE is available only during the mode explicitly mentioned in OPERATING_MODE. 0h = Conversion Start at I2C Command Bits, DEFAULT 1h = Conversion starts through trigger signal at INT pin OPERATING_MODE R/W 0h Selects Operating Mode and updates value based on operating mode if device transitions from Wake-up and sleep mode to Standby mode. 0h = Stand-by mode (starts new conversion at trigger event) 1h = Sleep mode 2h = Continuous measure mode 3h = Wake-up and sleep mode (W&S mode) 7.6.1.3 SENSOR_CONFIG_1 Register (Offset = 2h) [Reset = 0h] SENSOR_CONFIG_1 is shown in Table 7-10. Return to the Summary Table. Table 7-10. SENSOR_CONFIG_1 Register Field Descriptions Bit Field Type Reset Description 7-4 MAG_CH_EN R/W 0h Enables data acquisition of the magnetic axis channel(s) 0h = All magnetic channels of off, DEFAULT 1h = X channel enabled 2h = Y channel enabled 3h = X, Y channel enabled 4h = Z channel enabled 5h = Z, X channel enabled 6h = Y, Z channel enabled 7h = X, Y, Z channel enabled 8h = XYX channel enabled 9h = YXY channel enabled Ah = YZY channel enabled Bh = XZX channel enabled Ch = Reserved Dh = Reserved Eh = Reserved Fh = Reserved 3-0 SLEEPTIME R/W 0h Selects the time spent in low power mode between conversions when OPERATING_MODE =11b 0h = 1ms 1h = 5ms 2h = 10ms 3h = 15ms 4h = 20ms 5h = 30ms 6h = 50ms 7h = 100ms 8h = 500ms 9h = 1000ms Ah = 2000ms Bh = 5000ms Ch = 20000ms 7.6.1.4 SENSOR_CONFIG_2 Register (Offset = 3h) [Reset = 0h] SENSOR_CONFIG_2 is shown in Table 7-11. 28 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Return to the Summary Table. Table 7-11. SENSOR_CONFIG_2 Register Field Descriptions Bit Field Type Reset Description 7 RESERVED R 0h Reserved 6 THRX_COUNT R/W 0h Number of threshold crossings before the interrupt is asserted 0h = 1 threshold crossing 1h = 4 threshold crossing 5 MAG_THR_DIR R/W 0h Selects the direction of threshold check. This bit is ignored when THR_HYST > 001b 0h = sets interrupt for field above the threshold 1h = sets interrupt for field below the threshold 4 MAG_GAIN_CH R/W 0h Selects the axis for magnitude gain correction value entered in MAG_GAIN_CONFIG register 0h = 1st channel is selected for gain adjustment 1h = 2nd channel is selected for gain adjustment ANGLE_EN R/W 0h Enables angle calculation, magnetic gain, and offset corrections between two selected magnetic channels 0h = No angle calculation, magnitude gain, and offset correction enabled 1h = X 1st, Y 2nd 2h = Y 1st, Z 2nd 3h = X 1st, Z 2nd 1 X_Y_RANGE R/W 0h Select the X and Y axes magnetic range from 2 different options. 0h = ±40mT (TMAG5273A1) or ±133mT (TMAG5273A2), DEFAULT 1h = ±80mT (TMAG5273A1) or ±266mT (TMAG5273A2) 0 Z_RANGE R/W 0h Select the Z axis magnetic range from 2 different options. 0h = ±40mT (TMAG5273A1) or ±133mT (TMAG5273A2), DEFAULT 1h = ±80mT (TMAG5273A1) or ±266mT (TMAG5273A2) 3-2 7.6.1.5 X_THR_CONFIG Register (Offset = 4h) [Reset = 0h] X_THR_CONFIG is shown in Table 7-12. Return to the Summary Table. Table 7-12. X_THR_CONFIG Register Field Descriptions Bit Field Type Reset Description 7-0 X_THR_CONFIG R/W 0h 8-bit, 2's complement X axis threshold code for limit check. The range of possible threshold entrees can be +/-128. The threshold value in mT is calculated for A1 as (40(1+X_Y_RANGE)/128)*X_THR_CONFIG, for A2 as (133(1+X_Y_RANGE)/128)*X_THR_CONFIG. Default 0h means no threshold comparison. 7.6.1.6 Y_THR_CONFIG Register (Offset = 5h) [Reset = 0h] Y_THR_CONFIG is shown in Table 7-13. Return to the Summary Table. Table 7-13. Y_THR_CONFIG Register Field Descriptions Bit Field Type Reset Description 7-0 Y_THR_CONFIG R/W 0h 8-bit, 2's complement Y axis threshold code for limit check. The range of possible threshold entrees can be +/-128. The threshold value in mT is calculated for A1 as (40(1+X_Y_RANGE)/128)*X_THR_CONFIG, for A2 as (133(1+X_Y_RANGE)/128)*X_THR_CONFIG. Default 0h means no threshold comparison. Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 29 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 7.6.1.7 Z_THR_CONFIG Register (Offset = 6h) [Reset = 0h] Z_THR_CONFIG is shown in Table 7-14. Return to the Summary Table. Table 7-14. Z_THR_CONFIG Register Field Descriptions Bit Field Type Reset Description 7-0 Z_THR_CONFIG R/W 0h 8-bit, 2's complement Z axis threshold code for limit check. The range of possible threshold entrees can be +/-128. The threshold value in mT is calculated for A1 as (40(1+Z_RANGE)/128)*Z_THR_CONFIG, for A2 as (133(1+Z_RANGE)/128)*Z_THR_CONFIG. Default 0h means no threshold comparison. 7.6.1.8 T_CONFIG Register (Offset = 7h) [Reset = 0h] T_CONFIG is shown in Table 7-15. Return to the Summary Table. Table 7-15. T_CONFIG Register Field Descriptions Bit Field Type Reset Description 7-1 T_THR_CONFIG R/W 0h Temperature threshold code entered by user. The valid temperature threshold ranges are -41C to 170C with the threshold codes for -41C = 1Ah, and 170C = 34h. Resolution is 8 degree C/ LSB. Default 0h means no threshold comparison. T_CH_EN R/W 0h Enables data acquisition of the temperature channel 0h = Temp channel disabled 1h = Temp channel enabled 0 7.6.1.9 INT_CONFIG_1 Register (Offset = 8h) [Reset = 0h] INT_CONFIG_1 is shown in Table 7-16. Return to the Summary Table. Table 7-16. INT_CONFIG_1 Register Field Descriptions Bit 30 Field Type Reset Description 7 RSLT_INT R/W 0h Enable interrupt response on conversion complete. 0h = Interrupt is not asserted when the configured set of conversions are complete 1h = Interrupt is asserted when the configured set of conversions are complete 6 THRSLD_INT R/W 0h Enable interrupt response on a predefined threshold cross. 0h = Interrupt is not asserted when a threshold is crossed 1h = Interrupt is asserted when a threshold is crossed 5 INT_STATE R/W 0h INT interrupt latched or pulsed. 0h = INT interrupt latched until clear by a primary addressing the device 1h = INT interrupt pulse for 10us 4-2 INT_MODE R/W 0h Interrupt mode select. 0h = No interrupt 1h = Interrupt through INT 2h = Interrupt through INT except when I2C bus is busy. 3h = Interrupt through SCL 4h = Interrupt through SCL except when I2C bus is busy. 5h = Reserved 6h = Reserved 7h = Reserved 1 RESERVED R 0h Reserved Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Table 7-16. INT_CONFIG_1 Register Field Descriptions (continued) Bit 0 Field Type Reset Description MASK_INTB R/W 0h Mask INT pin when INT connected to GND 0h = INT pin is enabled 1h = INT pin is disabled (for wake-up and trigger functions) 7.6.1.10 MAG_GAIN_CONFIG Register (Offset = 9h) [Reset = 0h] MAG_GAIN_CONFIG is shown in Table 7-17. Return to the Summary Table. Table 7-17. MAG_GAIN_CONFIG Register Field Descriptions Bit Field Type Reset Description 7-0 GAIN_VALUE R/W 0h 8-bit gain value determined by a primary to adjust a Hall axis gain. The particular axis is selected based off the settings of MAG_GAIN_CH and ANGLE_EN register bits. The binary 8-bit input is interpreted as a fractional value in between 0 and 1 based off the formula, 'user entered value in decimal/256'. Gain value of 0 is interpreted by the device as 1. 7.6.1.11 MAG_OFFSET_CONFIG_1 Register (Offset = Ah) [Reset = 0h] MAG_OFFSET_CONFIG_1 is shown in Table 7-18. Return to the Summary Table. Table 7-18. MAG_OFFSET_CONFIG_1 Register Field Descriptions Bit Field Type Reset Description 7-0 OFFSET_VALUE_1ST R/W 0h 8-bit, 2's complement offset value determined by a primary to adjust first axis offset value. The range of possible offset valid entrees can be +/-128. The offset value is calculated by multiplying bit resolution with the entered value. 7.6.1.12 MAG_OFFSET_CONFIG_2 Register (Offset = Bh) [Reset = 0h] MAG_OFFSET_CONFIG_2 is shown in Table 7-19. Return to the Summary Table. Table 7-19. MAG_OFFSET_CONFIG_2 Register Field Descriptions Bit Field Type Reset Description 7-0 OFFSET_VALUE_2ND R/W 0h 8-bit, 2's complement offset value determined by a primary to adjust second axis offset value. The range of possible offset valid entrees can be +/-128. The offset value is calculated by multiplying bit resolution with the entered value. 7.6.1.13 I2C_ADDRESS Register (Offset = Ch) [Reset = 6Ah] I2C_ADDRESS is shown in Table 7-20. Return to the Summary Table. Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 31 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Table 7-20. I2C_ADDRESS Register Field Descriptions Bit Field Type Reset Description 7-1 I2C_ADDRESS R/W 35h 7-bit default factory I2C address is loaded from OTP during first power up. Change these bits to a new setting if a new I2C address is required (at each power cycle these bits must be written again to avoid going back to default factory address). 0h Enable a new user defined I2C address. 0h = Disable update of I2C address 1h = Enable update of I2C address with bits (7:1) 0 I2C_ADDRESS_UPDATE R/W _EN 7.6.1.14 DEVICE_ID Register (Offset = Dh) [Reset = 1h] DEVICE_ID is shown in Table 7-21. Return to the Summary Table. Table 7-21. DEVICE_ID Register Field Descriptions Bit Field Type Reset Description 7-2 RESERVED R 0h Reserved 1-0 VER R 1h Device version indicator. Reset value of DEVICE_ID depends on the orderable part number. 0h = Reserved 1h = ±40-mT and ±80-mT range 2h = ±133-mT and ±266-mT range 3h = Reserved 7.6.1.15 MANUFACTURER_ID_LSB Register (Offset = Eh) [Reset = 49h] MANUFACTURER_ID_LSB is shown in Table 7-22. Return to the Summary Table. Table 7-22. MANUFACTURER_ID_LSB Register Field Descriptions Bit Field 7-0 MANUFACTURER_ID_[7: R 0] Type Reset Description 49h 8-bit unique manufacturer ID 7.6.1.16 MANUFACTURER_ID_MSB Register (Offset = Fh) [Reset = 54h] MANUFACTURER_ID_MSB is shown in Table 7-23. Return to the Summary Table. Table 7-23. MANUFACTURER_ID_MSB Register Field Descriptions Bit Field 7-0 MANUFACTURER_ID_[15 R :8] Type Reset Description 54h 8-bit unique manufacturer ID 7.6.1.17 T_MSB_RESULT Register (Offset = 10h) [Reset = 0h] T_MSB_RESULT is shown in Table 7-24. Return to the Summary Table. 32 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Table 7-24. T_MSB_RESULT Register Field Descriptions Bit Field Type Reset Description 7-0 T_CH_RESULT [15:8] R 0h T-channel data conversion results, MSB 8 bits. 7.6.1.18 T_LSB_RESULT Register (Offset = 11h) [Reset = 0h] T_LSB_RESULT is shown in Table 7-25. Return to the Summary Table. Table 7-25. T_LSB_RESULT Register Field Descriptions Bit Field Type Reset Description 7-0 T_CH_RESULT [7:0] R 0h T-channel data conversion results, LSB 8 bits. 7.6.1.19 X_MSB_RESULT Register (Offset = 12h) [Reset = 0h] X_MSB_RESULT is shown in Table 7-26. Return to the Summary Table. Table 7-26. X_MSB_RESULT Register Field Descriptions Bit Field Type Reset Description 7-0 X_CH_RESULT [15:8] R 0h X-channel data conversion results, MSB 8 bits. 7.6.1.20 X_LSB_RESULT Register (Offset = 13h) [Reset = 0h] X_LSB_RESULT is shown in Table 7-27. Return to the Summary Table. Table 7-27. X_LSB_RESULT Register Field Descriptions Bit Field Type Reset Description 7-0 X_CH_RESULT [7:0] R 0h X-channel data conversion results, LSB 8 bits. 7.6.1.21 Y_MSB_RESULT Register (Offset = 14h) [Reset = 0h] Y_MSB_RESULT is shown in Table 7-28. Return to the Summary Table. Table 7-28. Y_MSB_RESULT Register Field Descriptions Bit Field Type Reset Description 7-0 Y_CH_RESULT [15:8] R 0h Y-channel data conversion results, MSB 8 bits. 7.6.1.22 Y_LSB_RESULT Register (Offset = 15h) [Reset = 0h] Y_LSB_RESULT is shown in Table 7-29. Return to the Summary Table. Table 7-29. Y_LSB_RESULT Register Field Descriptions Bit Field Type Reset Description 7-0 Y_CH_RESULT [7:0] R 0h Y-channel data conversion results, LSB 8 bits. Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 33 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 7.6.1.23 Z_MSB_RESULT Register (Offset = 16h) [Reset = 0h] Z_MSB_RESULT is shown in Table 7-30. Return to the Summary Table. Table 7-30. Z_MSB_RESULT Register Field Descriptions Bit Field Type Reset Description 7-0 Z_CH_RESULT [15:8] R 0h Z-channel data conversion results, MSB 8 bits. 7.6.1.24 Z_LSB_RESULT Register (Offset = 17h) [Reset = 0h] Z_LSB_RESULT is shown in Table 7-31. Return to the Summary Table. Table 7-31. Z_LSB_RESULT Register Field Descriptions Bit Field Type Reset Description 7-0 Z_CH_RESULT [7:0] R 0h Z-channel data conversion results, LSB 8 bits. 7.6.1.25 CONV_STATUS Register (Offset = 18h) [Reset = 10h] CONV_STATUS is shown in Table 7-32. Return to the Summary Table. Table 7-32. CONV_STATUS Register Field Descriptions Bit Field Type Reset Description 7-5 SET_COUNT R 0h Rolling Count of Conversion Data Sets POR R/W1CP 1h Device powered up, or experienced power-on-reset. Bit is clear when host writes back '1'. 0h = No POR 1h = POR occurred RESERVED R 0h Reserved 1 DIAG_STATUS R 0h Detect any internal diagnostics fail which include VCC UV, internal memory CRC error, INT pin error and internal clock error. Ignore this bit status if VCC < 2.3V. 0h = No diag fail 1h = Diag fail detected 0 RESULT_STATUS R 0h Conversion data buffer is ready to be read. 0h = Conversion data not complete 1h = Conversion data complete 4 3-2 7.6.1.26 ANGLE_RESULT_MSB Register (Offset = 19h) [Reset = 0h] ANGLE_RESULT_MSB is shown in Table 7-33. Return to the Summary Table. Table 7-33. ANGLE_RESULT_MSB Register Field Descriptions 34 Bit Field Type Reset Description 7-0 ANGLE_RESULT_MSB R 0h Angle measurement result in degree. The data is displayed from 0 to 360 degree in 13 LSB bits after combining the ANGLE_RESULT_MSB and _LSB bits. The 4 LSB bits allocated for fraction of an angle in the format (xxxx/16). Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 7.6.1.27 ANGLE_RESULT_LSB Register (Offset = 1Ah) [Reset = 0h] ANGLE_RESULT_LSB is shown in Table 7-34. Return to the Summary Table. Table 7-34. ANGLE_RESULT_LSB Register Field Descriptions Bit Field Type Reset Description 7-0 ANGLE_RESULT_LSB R 0h Angle measurement result in degree. The data is displayed from 0 to 360 degree in 13 LSB bits after combining the ANGLE_RESULT_MSB and _LSB bits. The 4 LSB bits allocated for fraction of an angle in the format (xxxx/16). 7.6.1.28 MAGNITUDE_RESULT Register (Offset = 1Bh) [Reset = 0h] MAGNITUDE_RESULT is shown in Table 7-35. Return to the Summary Table. Table 7-35. MAGNITUDE_RESULT Register Field Descriptions Bit Field Type Reset Description 7-0 MAGNITUDE_RESULT R 0h Resultant vector magnitude (during angle measurement) result. This value should be constant during 360 degree measurements 7.6.1.29 DEVICE_STATUS Register (Offset = 1Ch) [Reset = 10h] DEVICE_STATUS is shown in Table 7-36. Return to the Summary Table. Table 7-36. DEVICE_STATUS Register Field Descriptions Bit Field Type Reset Description 7-5 RESERVED R 0h Reserved 4 INTB_RB R 1h Indicates the level that the device is reading back from INT pin. The reset value of DEVICE_STATUS depends on the status of the INT pin at power-up. 0h = INT pin driven low 1h = INT pin status high 3 OSC_ER R/W1CP 0h Indicates if Oscillator error is detected. Bit is clear when host writes back '1'. 0h = No Oscillator error detected 1h = Oscillator error detected 2 INT_ER R/W1CP 0h Indicates if INT pin error is detected. Bit is clear when host writes back '1'. 0h = No INT error detected 1h = INT error detected 1 OTP_CRC_ER R/W1CP 0h Indicates if OTP CRC error is detected. Bit is clear when host writes back '1'. 0h = No OTP CRC error detected 1h = OTP CRC error detected 0 VCC_UV_ER R/W1CP 0h Indicates if VCC undervoltage was detected. Bit is clear when host writes back '1'. Ignore this bit status if VCC < 2.3V. 0h = No VCC UV detected 1h = VCC UV detected Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 35 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 8 Application and Implementation Note Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes, as well as validating and testing their design implementation to confirm system functionality. 8.1 Application Information 8.1.1 Select the Sensitivity Option Select the highest TMAG5273 sensitivity option that can measure the required range of magnetic flux density so that the ADC input range is maximized. Larger-sized magnets and farther sensing distances can generally enable better positional accuracy than very small magnets at close distances, because magnetic flux density increases exponentially with the proximity to a magnet. TI created an online tool to help with simple magnet calculations under the TMAG5273 product folder on ti.com. 8.1.2 Temperature Compensation for Magnets The TMAG5273 temperature compensation is designed to directly compensate the average temperature drift of several magnets as specified in the MAG_TEMPCO register bits. The residual induction (Br) of a magnet typically reduces by 0.12%/°C for NdFeB, and 0.20%/°C for ferrite magnets as the temperature increases. Set the MAG_TEMPCO bit to default 00b if the device temperature compensation is not needed. 8.1.3 Sensor Conversion Multiple conversion schemes can be adopted based off the MAG_CH_EN and CONV_AVG register bits settings. 8.1.3.1 Continuous Conversion The TMAG5273 can be set in continuous conversion mode when OPERATING_MODE is set to 10b. Figure 8-1 shows few examples of continuous conversion. The input magnetic field is processed in two steps. In the first step the device spins the hall sensor elements, and integrates the sampled data. In the second step the ADC block converts the analog signal into digital bits and stores in the corresponding result register. While the ADC starts processing the first magnetic sample, the spin block can start processing another magnetic sample. In this mode the temperature data is taken at the beginning of each new conversion. This temperature data is used to compensate for the magnetic thermal drift. 36 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 tstart_measure HALL Spin & Integraon X-Axis X-Axis Temp ADC Iniate Start X-Axis Conv me X-Axis Temp Start next Time OPERATING_MODE = 10b, MAG_CH_EN = 0001b, CONV_AVG = 000b tstart_measure HALL Spin & Integraon X-Axis Temp ADC Iniate X-Axis X-Axis X-Axis X-Axis Conv me Start Temp X-Axis X-Axis X-Axis Start next Time OPERATING_MODE = 10b, MAG_CH_EN = 0001b, CONV_AVG = 001b tstart_measure HALL Spin & Integra
on X-Axis Temp ADC Iniate Y-Axis X-Axis Y-Axis Conversion me Start X-Axis Z-Axis Z-Axis Temp Y-Axis X-Axis Z-Axis Y-Axis Z-Axis Start next Time OPERATING_MODE = 10b, MAG_CH_EN = 0111b, CONV_AVG = 000b Figure 8-1. Continuous Conversion Examples 8.1.3.2 Trigger Conversion The TMAG5273 supports trigger conversion with OPERATING_MODE set to 00b. The trigger event can be initiated through I2C command or INT signal. Figure 8-2 shows an example of trigger conversion with temperature, X, Y, and Z sensors activated. Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 37 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 tstart_measure HALL Spin & Integra
on X-Axis Temp ADC Trigger Y-Axis Z-Axis Y-Axis X-Axis Z-Axis Conversion me Start Time Figure 8-2. Trigger Conversion for Temperature, X, Y, & Z Sensors 8.1.3.3 Pseudo-Simultaneous Sampling In absolute angle measurement, application sensor data from multiple axes are required to calculate an accurate angle. The magnetic field data collected at different times through the same signal chain introduces error in angle calculation. The TMAG5273 offers pseudo-simultaneous sampling data collection modes to eliminate this error. Figure 8-3 shows an example where MAG_CH_EN is set at 1011b to collect XZX data. Equation 18 shows that the time stamps for the X and Z sensor data are the same. P< = P:1 + P:2 2 (18) where • tX1, tZ, tX2 are time stamps for X, Z, X sensor data completion as defined in Figure 8-3. HALL Spin & Integra
on ADC X-Axis Temp Z-Axis X-Axis Z-Axis X-Axis tX1 X-Axis tZ tX2 Time Figure 8-3. XZX Magnetic Field Conversion The vertical X, Y sensors of the TMAG5273 exhibit more noise than the horizontal Z sensor. The pseudosimultaneous sampling can be used to equalize the noise floor when two set of vertical sensor data are collected against one set of horizontal sensor data, as in examples of XZX or YZY modes. 8.1.4 Magnetic Limit Check The TMAG5273 enables magnetic limit checks for single or multiple axes at the same time. Figure 8-4 to Figure 8-7 show examples of magnetic limit cross detection events while the field going above, below, exiting a magnetic band, and entering a magnetic band. The device will keep generating interrupt with each new conversion if the magnetic fields remain in the shaded regions in the figures. The MAG_THR_DIR and THR_HYST register bits help select different limit cross modes. 38 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 X Ch Threshold X Ch Threshold 0 mT 0 mT X Magne
c Field X Magne
c Field Interrupt Interrupt Time Time Figure 8-4. Magnetic Upper Limit Cross Check With MAG_THR_DIR =0b, THR_HYST = 000b Figure 8-5. Magnetic Lower Limit Cross Check With MAG_THR_DIR =1b, THR_HYST = 000b X Ch Threshold X Ch Threshold 0 mT 0 mT X Magne
c Field X Magne
c Field - X Ch Threshold - X Ch Threshold Interrupt Interrupt Time Figure 8-6. Magnetic Field Going Out of Band Check With MAG_THR_DIR =0b, THR_HYST = 001b Time Figure 8-7. Magnetic Field Entering a Band Check With MAG_THR_DIR =1b, THR_HYST = 001b 8.1.5 Error Calculation During Linear Measurement The TMAG5273 offers independent configurations to perform linear position measurements in X, Y, and Z axes. To calculate the expected error during linear measurement, the contributions from each of the individual error sources must be understood. The relevant error sources include sensitivity error, offset, noise, cross axis sensitivity, hysteresis, nonlinearity, drift across temperature, drift across life time, and so forth. For a 3-axis Hall solution like the TMAG5273, the cross-axis sensitivity and hysteresis error sources are insignificant. Use Equation 19 to estimate the linear measurement error calculation at room temperature. where • • • • • ErrorLM_25C = B × SENSER 2 2 2 + Boff + NRMS_25 × 100% B (19) ErrorLM_25C is total error in % during linear measurement at 25°C. B is input magnetic field. SENSER is sensitivity error in decimal number at 25°C. As an example, enter 0.05 for sensitivity error of 5%. Boff is offset error at 25°C. NRMS_25 is RMS noise at 25°C. In many applications, system level calibration at room temperature can nullify the offset and sensitivity errors at 25°C. The noise errors can be reduced by internally averaging by up to 32x on the device in addition to the averaging that could be done in the microcontroller. Use Equation 20 to estimate the linear measurement error across temperature after calibration at room temperature. Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 39 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 where • • • • • ErrorLM_Temp = B × SENSDR 2 2 2 + Boff_DR + NRMS_Temp × 100% B (20) ErrorLM_Temp is total error in % during linear measurement across temperature after room temperature calibration. B is input magnetic field. SENSDR is sensitivity drift in decimal number from value at 25°C. As an example, enter 0.05 for sensitivity drift of 5%. Boff_DR is offset drift from value at 25°C. NRMS_Temp is RMS noise across temperature. If room temperature calibration is not performed, sensitivity and offset errors at room temperature must also account for total error calculation across temperature (see Equation 21). where • ErrorLM_Temp_NCal = B × SENSER 2 + B × SENSDR 2 2 2 + Boff + Boff_DR + NRMS_Temp × 100% B 2 (21) ErrorLM_Temp_NCal is total error in % during linear measurement across temperature without room temperature calibration. Note In this section, error sources such as system mechanical vibration, magnet temperature gradient, earth magnetic field, nonlinearity, lifetime drift, and so forth, are not considered. The user must take these additional error sources into account while calculating overall system error budgets. 8.1.6 Error Calculation During Angular Measurement The TMAG5273 offers on-chip CORDIC to measure angle data from any of the two magnetic axes. The linear magnetic axis data can be used to calculate the angle using an external CORDIC as well. To calculate the expected error during angular measurement, the contributions from each individual error source must be understood. The relevant error sources include sensitivity error, offset, noise, axis-axis mismatch, nonlinearity, drift across temperature, drift across life time, and so forth. Use the Angle Error Calculation Tool to estimate the total error during angular measurement. 8.2 Typical Application Magnetic 3D sensors are very popular due to contactless and reliable measurements, especially in applications requiring long-term measurements in rugged environments. The TMAG5273 offers design flexibility in wide range of industrial and personal electronics applications. In this section three common application examples are discussed in details. 8.2.1 Magnetic Tamper Detection Given their susceptibility to magnetic tampering, electricity meters often include magnetic sensors designed to detect external magnetic fields and take appropriate actions, such as disconnecting services to the electricity meter or applying a penalty fee for tampering. Figure 8-8 shows that magnetic tampering can result from a permanent magnet in any of the three orientations. Another form of magnetic tampering can be generated through an external coil powered from AC supply mains. The TMAG5273 offers flexible operating modes and configuration of three independent Hall-sensors to detect tampering. 40 Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 AC Mains Figure 8-8. TMAG5273 Magnetic Tamper Detection AC-DC Converter Main Supply OUT Power Mux Main Supply Status Back-up Power VCC TEST TMAG5273 VCC INT SCL SDA GND µController Back-up Battery GND Figure 8-9. TMAG5273 Application Diagram for Tamper Detection 8.2.1.1 Design Requirements Use the parameters listed in Table 8-3 for this design example. Table 8-1. Design Parameters DESIGN PARAMETERS OPERATING ON AC SUPPLY OPERATING ON BACK-UP BATTERY Device TMAG5273-A2 TMAG5273-A2 VCC 3.3 V 3.6 V to 1.7V Operating Mode Continuous measure mode Wake-up and sleep mode Submit Document Feedback Copyright © 2023 Texas Instruments Incorporated Product Folder Links: TMAG5273 41 TMAG5273 www.ti.com SLYS045A – JUNE 2021 – REVISED SEPTEMBER 2021 Table 8-1. Design Parameters (continued) DESIGN PARAMETERS OPERATING ON AC SUPPLY OPERATING ON BACK-UP BATTERY Design Objective Read the raw magnetic data and determine the magnitude and type of tampering (AC or DC magnetic field) Wake up the microcontroller if magnetic tampering occurs Timing Budget to Detect Tampering