AS5132 360 Step (8.5 bit) Programmable High Speed Magnetic Rotary Encoder Two digital absolute outputs (8.5 bit): 1 General Description - Serial interface The AS5132 is a contactless magnetic rotary encoder for accurate - PWM output angular measurement over a full turn of 360 degrees. It is a system- Incremental output with adjustable number of pulses on-chip, combining integrated Hall elements, analog frontend and BLDC Output UVW, selectable for 1,2,3,4,5,6 pole pairs digital signal processing in a single device. Supports external PWM clock mode To measure the angle, only a simple two-pole magnet, rotating over the center of the chip is required. Static and dynamic pre-commutation feature The absolute angle measurement provides instant indication of the User programmable zero position and sensitivity magnets angular position with a resolution of 8.5 bit = 360 positions High speed: up to 72,900 rpm per revolution. This digital data is available as serial output over the interface and as a pulse width modulated (PWM) signal. Direct measurement of magnetic field strength allows exact determination of vertical magnet distance An additional U,V,W output can be used for a block commutation for a brushless DC motor. An incremental signal is available as an Incremental Outputs ABI Quadrature: 90ppr, step direction: option. 180ppr, fixed pulse width 360ppr In addition to the angle information, the strength of the magnetic field 9-bit multi turn counter is also available as a 5-bit code. Wide magnetic field input range: 20 80 mT (typical) A software programmable (OTP) zero position simplifies assembly Wide temperature range: -40C to +150C as the zero position. The magnet does not need to be mechanically aligned. Thin Small Pb-free package: SSOP 20 Fully automotive qualified to AEC-Q100, grade 0 2 Key Features 3 Applications 360 contactless angular position sensing The AS5132 is suitable for contactless rotary position sensing, rotary switches (human machine interface), AC/DC motor position control and Brushless DC motor position control. Figure 1. AS5132 Block Diagram Test(3:0) COM/INC VDD5V Step Mode S U A AS5132 Commutation V B Interface W I VDDP Pre-Commutation DIR Tracking ADC & PWM Decoder Angle Decoder PWM Zero Adder DIO Angle Absolute Mag Serial CSN TC Interface Hall Array & CLK (SSI) AGC Frontend Amplifier Diagnostic Diag OTP PROG GND www.ams.com Revision 1.4 1 - 27AS5132 Datasheet - Contents Contents 1 General Description .................................................................................................................................................................. 1 2 Key Features............................................................................................................................................................................. 1 3 Applications............................................................................................................................................................................... 1 4 Pin Assignments ....................................................................................................................................................................... 3 4.1 Pin Descriptions.................................................................................................................................................................................... 3 5 Absolute Maximum Ratings ...................................................................................................................................................... 4 6 Electrical Characteristics........................................................................................................................................................... 5 6.1 Operating Conditions............................................................................................................................................................................ 5 6.2 System Parameters.............................................................................................................................................................................. 5 6.3 Magnet Specifications .......................................................................................................................................................................... 5 6.4 Programming Parameters .................................................................................................................................................................... 5 6.5 DC Characteristics of Digital Inputs...................................................................................................................................................... 6 6.6 DC Characteristics of Digital Outputs................................................................................................................................................... 6 6.7 Timing Characteristics .......................................................................................................................................................................... 6 7 Detailed Description.................................................................................................................................................................. 7 7.1 Synchronous Serial Interface (SSI) ...................................................................................................................................................... 7 7.1.1 Commands of the SSI in Normal Mode ....................................................................................................................................... 9 7.1.2 Extended Synchronous Serial Interface Mode .......................................................................................................................... 10 7.1.3 Programming Verification .......................................................................................................................................................... 13 7.2 Pulse Width Modulation (PWM) Output.............................................................................................................................................. 14 7.2.1 PWM External Clock.................................................................................................................................................................. 15 7.3 Incremental Outputs ........................................................................................................................................................................... 16 7.3.1 Quadrature A/B Output .............................................................................................................................................................. 16 7.3.2 Step Output Mode...................................................................................................................................................................... 17 7.3.3 Pre-Commutation Function........................................................................................................................................................ 17 7.3.4 Commutation Output UVW ........................................................................................................................................................ 18 7.3.5 Hysteresis of the Incremental Outputs....................................................................................................................................... 19 7.3.6 Multi Turn Counter ..................................................................................................................................................................... 20 7.3.7 High Speed Operation ............................................................................................................................................................... 20 7.3.8 Propagation Delay ..................................................................................................................................................................... 20 7.3.9 Error Detection........................................................................................................................................................................... 20 8 Application Information ........................................................................................................................................................... 21 8.1 Physical Placement of the Magnet ..................................................................................................................................................... 21 9 Package Drawings and Markings ........................................................................................................................................... 23 9.1 Recommended PCB Footprint............................................................................................................................................................ 24 10 Ordering Information............................................................................................................................................................. 26 www.ams.com Revision 1.4 2 - 27