AMR3108A

AMR3108A MULTIDIMENSION | Alldatasheet

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Technical content

AMR 180º/360º Magnetic Rotary Encoder Sensor AMR3108A

Description

The AMR3108A is a contactless, high-precision, and high-speed magnetic rotary encoder sensor, which integrated with anisotropic magnetoresistance (AMR) sensors and CMOS digital signal processing circuitry. The AMR3108A senses the single pole-pair magnet rotation above the chip by AMR sensors, collects the rotating magnetic field signal, transmits it to the digital processing unit, calculates the rotation angle and outputs 12-bit absolute position signals. The signal period of AMR3108A is 180° rotation angle. Using the reserved inverted switch interface, it can be extended to the detection of 360° rotation angle. AMR3108A outputs 12-bit absolute position signal through SPI communication protocol in a 180° rotation period. At the same time, it is able to output A/B phase programmable incremental position signal with 1 to 1024 pulse and programmable zero-point (Z phase) signal. AMR3108A also provides inverted UVW output, analog and PWM signals, with rotational speed up to 20,000 RPM. Features and Benefits

• Anisotropic magnetoresistance (AMR) technology
• Contactless measurement
• Available in SPI, ABZ differential, UVW, Analog and PWM interfaces
• 12-bit absolute position output in SPI mode
• Programmable A/B interpolation factors: ×1 to ×1024
• Programmable Z pulse width in 1LSB/2LSB/4LSB/90°
• Programmable inverted UVW output resolution in 1 to 16 pole-pair
• Programmable analog clamping voltage and PWM frequency
• Programmable zero position
• Angular repeatability < ±0.1°
• Speeds up to 20,000 RPM
• Adaptive supply voltage: 3.3 V to 5 V

Applications

• Contactless angular position measurement
• Brushless motor position sensing
• Rotary speed sensing
• Stepper motor TSSOP16L Datasheet MultiDimension Technology Co., Ltd. http://www.dowaytech.com/en/ Version 2.0.1

Part Number(*) Angle Range Output Interface SPI Interface Voltage Operating Temperature Package Packing Form AMR3108AP-2-0-1024 0° to 180° SPI / ABZ differential 3.3 V to 5.0 V -40 °C to 125 °C TSSOP16L Tape & Reel Note: *Please contact MDT local sales representative for more model’s information. Output interfaceSensor type Interface parameters Mode selection ABZ differential UVW pole-pair Clamping voltage PWM frequency AMR3108AP X YYZZW 0:SPI/ABZ differential 1:SPI/UVW 2:SPI/Analog 3:SPI/PWM 4:SPI/ABZ/UVW X=0 YYZZ:0000 YYZZ:1024 X=1 YYZZ:0001 YYZZ:0016 X=2 YY: max 00 to 15 LSB ZZ: min 00 to 15 LSB 1LSB = 100/4095*VDD e.g. when VDD = 5 V,

1 LSB = 122 mV

X=3 YYZZ: 0001 (1.08kHz) YYZZ: 0002 (0.54kHz) YYZZ: 0003 (0.27kHz) YYZZ: 0004 (0.135kHz) X=4 YYZZ: 0001 (ABZ: 1024 pulses UVW: 1 pole-pair) Catalogue MultiDimension Technology Co., Ltd. http://www.dowaytech.com/en/ AMR3108A AMR 180º/360º Magnetic Rotary Encoder Sensor

Figure 1. Pin configuration (TSSOP16L)

1 U/A- Output Digital U phase invert signal or A phase negative pulse signal

2 V/B- Output Digital V phase invert signal or B phase negative pulse signal

3 W/Z- Output Digital W phase invert signal or Z phase negative pulse signal

4 OUT Output Analog or digital Analog linear output or PWM output

5 MISO Output Digital SPI data out

6 MOSI Input Digital SPI data in

7 SCLK Input Digital SPI clock

8 CS Input Digital SPI chip select

9 VDD Input Power supply Power supply

10 SW1 Input Digital AMR phase signal 1

11 SW0 Input Digital AMR phase signal 0

12 GND Input GND Ground

13 ERROR Output Digital Error signal

14 Z Output Digital Phase Z pulse signal

15 B Output Digital Phase B pulse signal

16 A Output Digital Phase A pulse signal

MultiDimension Technology Co., Ltd.

SW1 of AMR3108AP to determine the phase of signals, and their relative position is shown in Figure 2. TMR and Hall rotation sensors. Figure 2. Schematic connection diagram of AMR3108AP and switches (Top view) otherwise: AMR3108AP-2-X-YYZZ. For example: factory default model is AMR3108AP-2-0-1024. MultiDimension Technology Co., Ltd.

1. Absolute Maximum Ratings Parameter Symbol Min. Max. Unit Supply voltage VDD - 6 V Magnetic flux density B - 4000 Gs Operating ambient temperature TA -40 125 °C Storage ambient temperature TSTG -40 150 °C Ambient humidity (no dew) HMD 10 90 %RH ESD performance (HBM) VESD - 2 kV The Absolute Maximum Rating parameters is only a condition to ensure that the chip is not permanently damaged. For normal operating conditions, please refer to Electrical and Magnetic Field Specifications. 3. Electrical Specifications VDD = 3.3 V to 5 V, TA = 25 °C Parameter Symbol Condition Min. Typ. Max. Unit Supply voltage VDD - 3.3 - 5 V Supply current IDD No output load - 8 10 mA Output voltage VOUT MISO, A, B, Z, U, V, W, ERROR -0.3 - VDD V MISO output current IOUT1 - -1.25 - 1.25 mA Input voltage VIN1 MOSI, CS, SCLK -0.3 - VDD V 4. Signal Conversion Specifications Parameter Symbol Condition Min. Typ. Max. Unit Measurement range Arange - 0 - 180/360 Deg Absolute resolution RESSDC - - 12 - bit Nonlinearity error INLOPT - - - ±0.5 Deg Nonlinearity error in full temperature range INLdrift -40 °C to 125 °C - - ±1.2 Deg Differential nonlinearity DNL - - - ±0.044 Deg Hysteresis HYS - - - ±0.22 Deg Repeatability Arepeat - - - ±0.088 Deg Output delay TD - - 5 10 μs Rotation speed Rspeed - - - 20000 RPM MultiDimension Technology Co., Ltd. http://www.dowaytech.com/en/ AMR3108A AMR 180º/360º Magnetic Rotary Encoder Sensor

1. Digital Interface Signals CS, SCLK, MOSI, MISO Parameter Symbol Condition Min. Typ. Max. Unit Input threshold high VI(HI) - 3.3 - - V Input threshold low VI(LO) - - - 1 V Output threshold high VO(HI) I = 1 mA 4.5 - - V Output threshold low VO(LO) I = 1 mA - - 0.5 V Output load capacitance CL - - - 100 pF 6. Digital Output Signals A, B, Z, U, V, W Parameter Symbol Condition Min. Typ. Max. Unit Saturation voltage high VS(HI) I = 1 mA 4.5 - - V Saturation voltage low VS(LO) I = 1 mA - - 0.5 V Rise time trise CL = 100 pF - - 150 ns Fall time tfall CL = 100 pF - - 150 ns 7. Analog Output Characteristics Parameter Symbol Condition Min. Typ. Max. Unit Output load resistance RL - - 10 - kΩ Output load capacitance CL - - 10 - nF Minimum resolution of digital-to-analog conversion DACLSB 12 bit - 0.024 - %VDD Integral nonlinearity of digital-to-analog conversion DACINL - - - ±1 Deg Differential nonlinearity of digital-to-analog conversion DACDNL - - - ±0.2 Deg Analog output noise DACnoise - - - ±2 LSB Proportional error Erm - -0.3 - 0.3 % 8. PWM Characteristics Parameter Symbol Condition Min. Typ. Max. Unit PWM frequency FPWM Programmable -10 % 1.08 0.54 0.27 0.135 +10 % kHz Rise time trise 10 nF load - - 1 μs Fall time tfall 10 nF load - - 1 μs MultiDimension Technology Co., Ltd. http://www.dowaytech.com/en/ AMR3108A AMR 180º/360º Magnetic Rotary Encoder Sensor

1. Magnetic Field Specification Recommended magnet: cylindrical NdFeB magnet, Φ6 mm × 2.5 mm, radial magnetization Parameter Symbol Condition Min. Typ. Max. Unit Diameter of magnet dmag - 3.0 6.0 20 mm Thickness of magnet tmag - - 2.5 - mm Mounting distance Din Recommend magnet 0.5 1 2 mm Magnetic field Bext Sensor surface 300 - - Gs Center deviation between magnet and sensor xdis - - - 0.25 mm Center deviation between sensor and package xpac - -0.15 - 0.15 mm Angle deviation of the sensor within package φpac - -3 - 3 Deg Sensor to package clearance hpac - - 0.4 - mm MultiDimension Technology Co., Ltd. http://www.dowaytech.com/en/ AMR3108A AMR 180º/360º Magnetic Rotary Encoder Sensor

10.1 SPI output

is available to read at the MISO pin upon the rising edge of the SCLK signal. Figure 3. SPI timing diagram MultiDimension Technology Co., Ltd.

Figure 4. SPI timing diagram in reading angular values MultiDimension Technology Co., Ltd.

10.2 ABZ output

programmable in 1 LSB, 2 LSB, 4 LSB and 90º modes. Figure 5. ABZ signal timing diagram Figure 6. Schematic circuit of ABZ mode this xMR310X calibration kit. MultiDimension Technology Co., Ltd.

10.3 UVW output

UVW mode is shown in Figure 8. Figure 7. UVW output diagram Figure 8. Schematic circuit of UVW mode MultiDimension Technology Co., Ltd.

10.4 Analog output

needs to be programmed to be an analog voltage output as shown in Figure 9. Figure 9. Waveform of analog output and pull-up resistor R1 (typical value 10 kΩ) for analog output circuit to obtain better performance. Figure 10. Schematic circuit of analog mode MultiDimension Technology Co., Ltd.

characteristic curves are both programmable as shown in Figure 11. Figure 11. Schematic of clamping voltage in analog waveform by this xMR310X calibration kit.

10.5 PWM output

Figure 12. Waveform of PWM mode output signal MultiDimension Technology Co., Ltd.

1. Mechanical Angle Orientation

Figure 13. Definition of the magnetic field orientation measured by AMR3108AP MultiDimension Technology Co., Ltd.

Figure 14. Package outline of TSSOP16L (unit: mm) MultiDimension Technology Co., Ltd.

No.2 Guangdong Road, Zhangjiagang Free Trade Zone, Jiangsu, China Web：www.dowaytech.com/en E-mail：info@dowaytech.com Copyright © 2022 by MultiDimension Technology Co., Ltd. Information furnished herein by MultiDimension Technology Co., Ltd. (hereinafter MDT) is believed to be accurate and reliable. However, MDT disclaims any and all warranties and liabilities of any kind, with respect to any examples, hints or any performance or use of technical data as described herein and/or any information regarding the application of the product, including without limitation warranties of non-infringement of intellectual property rights of any third party. This document neither conveys nor implies any license under patent or other industrial or intellectual property rights. Customer or any third-party must further determine the suitability of the MDT products for its applications to avoid the applications default of customer or third-party. MDT accept no liability in this respect. MDT does not assume any liabilities of any indirect, incidental, punitive, special or consequential damages (including without limitation of lost profi ts, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort (including negligence), warranty, breach of contract or any other legal theory. Notwithstanding any damages that customer might incur for any reason whatsoever, MDT’s aggregate and cumulative liability towards customer for the products described herein shall be limited in accordance with the terms and conditions of commercial sale of MDT. Absolute maximum ratings are the extreme limits the device will withstand without damage to the MDT product. However, the electrical and mechanical characteristics are not guaranteed as the maximum limits (above recommended operating conditions) are approached. MDT disclaims any and all warranties and liabilities of the MDT product will operate at absolute maximum ratings. Specifi cations may change without notice. Please download latest document from our offi cial website www.dowaytech.com/en. Recycling The product(s) in this document need to be handed over to a qualifi ed solid waste management services company for recycling in accordance with relevant regulations on waste classifi cation after the end of the product(s) life.