A1330LLETR-P-T

A1330 Programmable Angle Sensor IC with Analog and PWM Output FEATURES AND BENEFITS • Contactless 0° to 360° angle sensor IC, for angular position, rotational speed, and direction measurement • Single and dual die options available in same package • Non-volatile memory (EEPROM) for use in application trimming/calibration • Circular Vertical Hall (CVH) technology provides a single-channel sensor system with air gap independence • Angle Refresh Rate (output rate) configurable between 25 and 3200 µs through EEPROM programming • Customer-programmable output clamp levels provide short-circuit diagnostic capabilities • Open-circuit detection on ground pin (broken wire) • Undervoltage lockout for VCC below specification • Fine angle scaling for short-stroke applications • Missing Magnet Error flag for notifying controller of low magnetic field level • EEPROM programmable angle reference (0°) position and rotation direction (CW or CCW) • AEC-Q100 automotive qualified PACKAGE: 8-pin TSSOP (LE package) Regulator Multisegment CVH Element The A1330 is a 360° angle sensor IC that provides contactless high-resolution angular position information based on magnetic Circular Vertical Hall (CVH) technology. It has a system-onchip (SoC) architecture that includes: a CVH front end, digital signal processing, and an analog output driver. It also includes on-chip EEPROM technology, capable of supporting up to 100 read/write cycles, for flexible end-of-line programming of calibration parameters. Broken ground wire detection and user-selectable output voltage clamps make the A1330 ideal for high-reliability applications requiring high-speed 0° to 360° angle measurements. The A1330 provides adjustable internal averaging, allowing response time to be traded for resolution. This is ideal for applications operating at low rotational velocities requiring high precision. For higher RPM applications, the A1330 provides industry-leading analog response time when no averaging is enabled. With programmable angle scaling, the A1330 supports applications requiring short angular displacements, while maintaining full dynamic range on the output. Programmable minimum and maximum angle thresholds allow diagnosis of mechanical failures. The A1330 is available as either a single or dual die option, in an 8-pin TSSOP. The package is lead (Pb) free with 100% matte-tin leadframe plating. Not to scale VCC DESCRIPTION SoC die 1 To all internal circuits DIGITAL CONTROLLER Temperature Compensation Internal Calibration ANALOG FRONTEND ADC Interpolator ANALOG BACKEND Output Buffer EEPROM Short Stroke Bandpass Filter VOUT Zero Angle Diagnostics DIGITAL BACKEND LPF SD Mod PWM MOD GND Output Controller SoC die 2 (optional) Functional Block Diagram A1330-DS, Rev. 4 MCO-0000317 May 12, 2021 Programmable Angle Sensor IC with Analog and PWM Output A1330 SELECTION GUIDE Part Number A1330LLETR-T A1330LLETR-P-T A1330LLETR-DD-T A1330LLETR-P-DD-T A1330LLETR-T-C02 Application Number of Die Analog Output Single Die PWM Output Single Die Analog Output Dual Die PWM Output Dual Die Analog Output [2] Single Die Package Packing [1] 8-pin TSSOP 4000 pieces per 13-inch reel Contact Allegro™ for additional packing options. [2] Increased Angle averaging and Analog hysteresis settings for reduced angle noise. [1] ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Unit Forward Supply Voltage VCC Not sampling angles 26.5 V Reverse Supply Voltage VRCC Not sampling angles –18 V Forward Output Voltage VOUT VOUT < VCC + 2 V Reverse Output Voltage VROUT V V Operating Ambient Temperature TA –40 to 150 °C Maximum Junction Temperature TJ(max) 165 °C Tstg –65 to 170 °C Storage Temperature L range 16 0.5 THERMAL CHARACTERISTICS: May require derating at maximum conditions; see application information Characteristic Package Thermal Resistance Symbol RθJA Value Unit LE-8 single die package Test Conditions* 145 °C/W LE-8 dual die package 277 °C/W *Additional thermal information available on the Allegro website. Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 2 Programmable Angle Sensor IC with Analog and PWM Output A1330 Table of Contents Features and Benefits............................................................ 1 Description........................................................................... 1 Packages............................................................................. 1 Functional Block Diagram...................................................... 1 Selection Guide.................................................................... 2 Absolute Maximum Ratings.................................................... 2 Thermal Characteristics......................................................... 2 Pinout Diagrams and Terminal Lists......................................... 4 Operating Characteristics....................................................... 5 Typical Performance Characteristics........................................ 7 Functional Description........................................................... 8 Operational Modes............................................................. 8 Angle Measurement........................................................... 8 Short Stroke...................................................................... 8 Output Types..................................................................... 8 Undervoltage and Overvoltage Lockout.............................. 10 Hysteresis....................................................................... 10 Programming Serial Interface................................................11 Transaction Types.............................................................11 Writing the Access Code....................................................11 Writing to Non-Volatile Memory...........................................11 Writing to Volatile Registers............................................... 12 Reading from EEPROM.................................................... 12 Error Checking................................................................ 12 Serial Interface Reference.................................................... 13 Serial Interface Message Structure.................................... 14 Special Access Code Commands...................................... 15 EEPROM Locking............................................................ 16 Safety Features............................................................... 16 Internal Detection Circuitry................................................ 16 Detecting Broken Ground Wire.......................................... 16 Angle Compensation........................................................ 18 Angle Averaging.............................................................. 18 Pre-Gain Offset................................................................ 19 Polarity Adjust................................................................. 19 Short Stroke.................................................................... 19 Clamp and Roll-Over Logic............................................... 21 Additional Short Stroke Examples...................................... 22 Application Information........................................................ 24 Magnetic Target Requirements.......................................... 24 Field Strength.................................................................. 24 Setting the Zero-Degree Position....................................... 25 Magnetic Misalignment..................................................... 25 Application Circuit Description........................................... 26 ESD Performance............................................................ 26 EEPROM Memory Map....................................................... 27 Package Outline Drawings................................................... 35 APPENDIX A: Angle Error and Drift Definition........................A-1 APPENDIX B: CRC Documentation......................................B-1 Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 3 Programmable Angle Sensor IC with Analog and PWM Output A1330 PINOUT DIAGRAMS AND TERMINAL LIST TABLES VCC 1 8 NC VOUT 2 7 NC NC 3 6 NC GND 4 5 NC LE-8 Package Pinout (single die) Terminal List Table (Single Die) Pin Name Pin Number Function VCC 1 Device power supply. Serves as Manchester communication input pin. VOUT 2 Angle output (analog or PWM). Manchester output during serial communication. Input for EEPROM programming pulses. NC* 3,5,6,7,8 Not connected; connect to ground for optimal ESD performance GND 4 Ground * NC pins must be tied to GND for optimum ESD performance. Terminal List Table (Dual Die) VCC_1 1 VOUT_1 2 NC 3 GND_1 4 8 NC 7 GND_2 6 VOUT_2 Pin Name Pin Number VCC_1 1 VOUT_1 2 Angle output (analog or PWM). Manchester output during serial communication. Input for EEPROM programming pulses. (die 1) NC* 3, 8 Not connected; connect to ground for optimal ESD performance GND_1 4 Ground (die 1) VCC_2 5 Device power supply. Serves as Manchester communication input pin. (die 2) VOUT_2 6 Angle output (analog or PWM). Manchester output during serial communication. Input for EEPROM programming pulses. (die 2) GND_2 7 Ground (die 2) 5 VCC_2 LE-8 Package Pinout (dual die) Function Device power supply. Serves as Manchester communication input pin. (die 1) * NC pins must be tied to GND for optimum ESD performance. Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 4 Programmable Angle Sensor IC with Analog and PWM Output A1330 OPERATING CHARACTERISTICS: Valid over the full operating voltage and ambient temperature ranges, unless otherwise noted Characteristics Symbol Test Conditions Min. Typ.  Max. Unit [1] 4.5 – 5.5 V TA ≥ 25°C – 12 15 mA TA < 25°C – 12.6 16 mA One die, PWM output, unloaded output – 8.5 10 mA VUVLO(H) Maximum VCC , dV/dt = 1 V/ms, TA = 25°C, A1330 sampling enabled, rising VCC – – 4.65 V VUVLO(L) Maximum VCC , dV/dt = 1 V/ms, TA = 25°C, A1330 sampling disabled, falling VCC 3.9 – 4.5 V dV/dt = 1 V/ms, TA = 25°C – 180 – mV VOVLO(H) Maximum VCC , dV/dt = –1 V/ms, TA = 25°C, A1330 sampling disabled – 6.3 – V VOVLO(L) Maximum VCC , dV/dt = 1 V/ms, TA = 25°C, A1330 sampling enabled 5.5 5.9 – V mV ELECTRICAL CHARACTERISTICS Supply Voltage [2] VCC Supply Current ICC Undervoltage Lockout Threshold Voltage [3] Undervoltage Lockout Threshold Hysteresis VUVLO(HYS) Overvoltage Lockout Threshold Voltage Overvoltage Lockout Threshold Hysteresis One die, analog output, unloaded output VOVLO(HYS) dV/dt = –1 V/ms, TA = 25°C – 450 – VZSUP ICC = ICC + 3 mA, TA = 25°C 26.5 – – V – – 5 mA – 300 – µs Supply Zener Clamp Voltage Reverse-Battery Current IRCC Power-On Time [4][8] tPO VRCC = 18 V, TA = 25°C ANALOG OUTPUT CHARACTERISTIC DC Output Resistance  [4] Output Load Resistance [4] Output Current Limit Output Load Capacitance [4] Broken Wire Voltage Output Slew Rate DAC Output Noise [4] ROUT RL ILIMIT 1 – Ω 4.7 – – kΩ VOUT to GND 4.7 – – kΩ Minimum output, shorted to 5 V 24 29 34 mA Maximum output, shorted to GND – 3 – mA – – 10 nF VBRK(H) COUT TA = 25°C, RL(PU) = 10 kΩ to VCC – VCC – V VBRK(L) TA = 25°C, RL(PD) = 10 kΩ to GND – 130 – mV 10 kΩ pull-up – 100 – V/ms DAC output, excluding angle measurement noise, 30 kHz BW setting – – 15 mVp-p DAC output, excluding angle measurement noise, 15 kHz BW setting – – 10 mVp-p Across entire code range, theoretical noisefree input, 30 kHz BW – 12 – bits – 300 µs >60 µs 10 ms 2 µs >300 µs >60 µs 10 ms 18 V ERASE PROGRAM 6V Figure 10: Top-Level Programming Interface Controller A1330 VOUT High Voltage pulses to activate EEPROM cells GND Read Acknowledge Manchester Code Figure 9: Top-Level Programming Interface Table 2: EEPROM Pulse Parameter Comments Min. Typ. Max. Unit Pulse High Time Time above minimum pulse voltage 8 10 11 ms Rise Time 10% to 90% of minimum pulse level 300 – – µs Fall Time 10% to 90% of minimum pulse level 60 – – µs 18 19 19.5 V 2 µs – 50 ms µs/ms Pulse Voltage Separation time Time between first pulse dropping below 6 V and 2nd pulse rising above 6 V Allegro MicroSystems 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 11 Programmable Angle Sensor IC with Analog and PWM Output A1330 Writing to Volatile Registers Error Checking The three main volatile write commands (Write Access, Manchester Enable and Manchester Disable) are all accomplished by writing to register 0x1F. The serial interface uses a cyclic redundancy check (CRC) for data-bit error checking (synchronization bits are ignored during the check). In addition to these three commands, the PWM output version requires a PWM Disable command be written prior to performing a Manchester read and a PWM Enable command prior to going back to Normal Mode. These two commands are written to register 0x22. The CRC algorithm is based on the polynomial Reading from EEPROM To read from EEPROM, the Manchester mode must be entered. This is accomplished by sending the Manchester Enable code on VCC. For PWM parts, an additional PWM Disable command must also be sent. g(x) = x3 + x + 1 and the calculation is represented graphically in Figure 11. The trailing 3 bits of a message frame comprise the CRC token. The CRC is initialized at 111. C0 C1 1x 0 Write Access Command EEPROM Write Write To EEPROM 0x 2 1x 3 = x3 + x + 1 Figure 11: CRC Calculation EEPROM Programming Pulses Normal Operation Normal Operation VOUT Input Data C2 1x 1 After the Read Acknowledge frame has been received from the A1330, the controller must send a Manchester Disable command to restore VOUT to normal operation. The required sequence is shown in Figure 12. VCC , GND t