KMA215,118

KMA215 Programmable angle sensor with SAE J2716 SENT Rev. 1 — 24 February 2014 Product data sheet 1. Product profile 1.1 General description The KMA215 is a magnetic angle sensor module with digital output in accordance with SAE J2716 JAN2010 Single Edge Nibble Transmission (SENT). The MagnetoResistive (MR) sensor bridges, the mixed signal Integrated Circuit (IC) and the required capacitors are integrated into a single package. This angular measurement module KMA215 is pre-programmed, pre-calibrated and therefore, ready to use. The default configuration for the digital output is SENT2010-03.0us-6dn-npp-nsp-A.3. The KMA215 allows user-specific adjustments of angular range, zero angle and SENT configuration. The settings are stored in a multi-time programmable non-volatile memory. 1.2 Features and benefits  High precision sensor for magnetic  High temperature range up to 160 C angular measurement  Single package sensor module with  Overvoltage protection up to 16 V integrated filters and pulse shaping for improved ElectroMagnetic Compatibility (EMC)  Automotive qualified in accordance with  Push pull output stage compliant with AEC-Q100 Rev-G SAE J2716 JAN2010 SENT with pulse shaping  Programmable user adjustments,  Optional high-speed 12-bit SENT angular range, zero angle and SENT message format H.3 configuration  Fail-safe non-volatile memory with write  Optional enhanced serial data protection using lock bit communication  Independent from magnetic field  Programming via One-Wire Interface strength above 35 kA/m (OWI)  Ready to use without external  8 user-programmable SENT messages components (8  12 bit)  Factory calibrated  Magnet-loss and broken bond wire detection KMA215 NXP Semiconductors Programmable angle sensor with SAE J2716 SENT 1.2.1 Extract of SENT modes (shorthand notation)           SENT2010-03.0us-6dn-npp-nsp-A.3 (default configuration) SENT2010-03.0us-6dn-npp-esp-A.3 SENT2010-03.0us-6dn-ppc(297.0)-nsp-A.3 SENT2010-03.0us-6dn-ppc(297.0)-esp-A.3 SENT2010-06.0us-6dn-npp-nsp-A.3 SENT2010-06.0us-6dn-npp-esp-A.3 SENT2010-06.0us-6dn-ppc(297.0)-nsp-A.3 SENT2010-06.0us-6dn-ppc(297.0)-esp-A.3 SENT201x-03.0us-4dn-npp-nsp-H.3 SENT201x-03.0us-4dn-npp-esp-H.3 Additional SENT modes can be found in Table 8, Table 12 and Table 15. 2. Pinning information Table 1. Pin Pinning Symbol Description 1 VDD supply voltage 2 GND ground 3 OUT/DATA SENT output or OWI data interface Simplified outline    3. Ordering information Table 2. Ordering information Type number KMA215 KMA215 Product data sheet Package Name Description Version - plastic single-ended multi-chip package; 6 interconnections; 3 in-line leads SOT1288-2 All information provided in this document is subject to legal disclaimers. Rev. 1 — 24 February 2014 © NXP B.V. 2014. All rights reserved. 2 of 50 xxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx x xxxxxxxxxxxxxx xxxxxxxxxx xxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxx xxxxxxxxxxxxxx xxxxxx xx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxx xxxxx x x ',*,7$/ 92/7$*( 5(*8/$725 $1$/2* 92/7$*( 5(*8/$725 6:,7&+,1* 325 81'(592/7$*( '(7(&7,21 325 NXP Semiconductors $1$/2* 92/7$*( 5(*8/$725 &/($1 4. Functional diagram KMA215 Product data sheet 9'' /2:3$66 ),/7(5 08/7,3/(;(508; /2:3$66 ),/7(5 GLIIHUHQWLDO DPSOLILHU 26&,//$725 $'& 6(17 35272&2/ *(1(5$725 RXWSXW EXIIHU 287'$7$ 21(:,5( ,17(5)$&( *1' 12192/$7,/( 0(025< 7(67 &21752/ &/2&. *(1(5$725 '(08; &/ ',*,7$/ ),/7(5$1' $9(5$*,1* 2))6(7 &255(&7,21 $1*/( &$/&8/$7,21 $1*8/$5 5$1*( $'-8670(17 6(5,$/ ,17(5)$&( *1' 0$*1(725(6,67,9( 6(1625%5,'*(6 6,*1$/&21',7,21,1*,17(*5$7('&,5&8,7 DDD Functional diagram of KMA215 KMA215 3 of 50 © NXP B.V. 2014. All rights reserved. Fig 1. Programmable angle sensor with SAE J2716 SENT Rev. 1 — 24 February 2014 All information provided in this document is subject to legal disclaimers. &EORFN KMA215 NXP Semiconductors Programmable angle sensor with SAE J2716 SENT 5. Functional description The KMA215 amplifies two orthogonal differential signals from MR sensor bridges and converts them into the digital domain. The angle is calculated using the COordinate Rotation DIgital Computer (CORDIC) algorithm and transmitted in a SENT frame compliant to SAE J2716 SENT standard. Zero angle and angular range are programmable. In addition, eight 12-bit Original Equipment Manufacturer (OEM) registers are available for customer purposes, such as sample identification. The KMA215 comprises a Cyclic Redundancy Check (CRC) and an Error Detection and Correction (EDC) for the non-volatile memory. It also has magnet-loss and broken bond wire detection. After multiplexing the two MR Wheatstone bridge signals and their successive amplification, the signal is converted into the digital domain by an Analog-to-Digital Converter (ADC). Further processing is done within an on-chip state machine. This state machine controls offset cancelation, calculation of the mechanical angle using the CORDIC algorithm, as well as zero angle and angular range adjustment. The SENT protocol generator converts the angular information into SENT messages that are repeatedly sent via the SENT output. The configuration parameters are stored in a user-programmable non-volatile memory. The OWI (accessible using pin OUT/DATA) is used for accessing the memory. In order to protect the memory content, a lock bit can be set. After locking the non-volatile memory, its content cannot be changed anymore. 5.1 Angular measurement directions The differential signals of the MR sensor bridges depend only on the direction of the external magnetic field strength Hext, which is applied parallel to the plane of the sensor. In order to obtain a correct output signal, exceed the minimum saturation field strength. KMA215 Product data sheet All information provided in this document is subject to legal disclaimers. Rev. 1 — 24 February 2014 © NXP B.V. 2014. All rights reserved. 4 of 50 KMA215 NXP Semiconductors Programmable angle sensor with SAE J2716 SENT α Hext 001aan665 Fig 2. Angular measurement directions Since the Anisotropic MR (AMR) effect is periodic over 180, the sensor output is also 180-periodic. The angle is calculated relative to a freely programmable zero angle. The dashed line indicates the mechanical zero degree position. 6. Digital output The KMA215 SENT provides a digital output signal on pin OUT/DATA compliant with the SAE J2716 JAN2010 SENT. The measured angle  is converted linearly into a value, which is digital encoded in SENT frames. Either a positive or a negative angular slope characteristic is provided for this purpose. Table 3 describes the digital output behavior for a positive slope. A magnetic field angle above the programmed maximum angle max but below the clamp switch angle sw(CL) sets the output to the upper clamping value. If the magnetic field angle is larger than the clamp switch angle, the output value switches from upper to lower clamping value. If there is a negative slope, the clamping levels are changed. Table 3. KMA215 Product data sheet Digital output behavior for a positive slope Magnetic field angle Data value max <  < sw(CL) CLAMP_HI sw(CL) <  < ref + 180 CLAMP_LO All information provided in this document is subject to legal disclaimers. Rev. 1 — 24 February 2014 © NXP B.V. 2014. All rights reserved. 5 of 50 KMA215 NXP Semiconductors Programmable angle sensor with SAE J2716 SENT  /6% ĮUQJ &/$03B+, &/$03B/2  ĮGHJ ĮPD[  ĮVZ&/ ĮUHIƒ ĮUHI DDD max = ref + rng Fig 3. Characteristic of the digital output 6.1 Transmission of sensor messages The KMA215 repeatedly sends a sequence of pulses based on the encoding scheme of SENT. The transmitted message is a sequence of 4-bit nibbles (SENT frame). The time base of the SENT frame is defined in clock ticks with a configurable duration of Tclk = 3.0 s, 4.5 s, 6.0 s, 12.0 s and 24.0 s each clock tick. A calibration pulse followed by a STATUS nibble, a constant number of DATA nibbles and a CRC nibble as shown in Figure 4 define one message frame of a SENT transmission. The KMA215 supports the SENT data formats in accordance with the appendix A.1 and A.3 of the SAE J2716 JAN2010 SENT. Additionally a high-speed 12-bit message format H.3 is implemented. General SENT specification can be found in: 3$86(SXOVH RSWLRQDO &5&FKHFNVXP '$7$ '$7$ '$7$ '$7$ '$7$ '$7$ 67$786 6