AS5134角度传感器数据手册资源-CSDN文库

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aust

riamicrosystems AG

is no

ams AG

The technical content of this austriamicrosystems datasheet is still valid.

ntact information:

Headquarters:

ams AG

Tobelbaderstrasse 30

8141 Unterpremstaetten, Austria

Tel: +43 (0) 3136 500 0

e-Mail: ams_sales@ams.com

ease visit our website at www.ams.com

AS5134

360 Step Programmable High Speed Magnetic Rotary Encoder

www.austriamicrosystems.com/AS5134 Revision 2.3 1 - 32

Datasheet

1 General Description

The AS5134 is a contactless magnetic rotary encoder for accurate

angular measurement over a full turn of 360º. It is a system-on-chip,

combining integrated Hall elements, analog front-end and digital

signal processing in a single device.

To measure the angle, only a simple two-pole magnet, rotating over

the center of the chip is required. The absolute angle measurement

provides instant indication of the magnet’s angular position with a

resolution of 8.5 bit = 360 positions per revolution. This digital data is

available as a serial bit stream and as a PWM signal. In addition to

the angle information, the strength of the magnetic field is also

available as a 6-bit code.

Data transmission can be configured for 1-wire (PWM), 2-wires

(DCLK, DIO) or 3-wires (DCLK, DIO, CS).

A software programmable (OTP) zero position simplifies assembly

as the zero position of the magnet does not need to be mechanically

aligned.

A Power Down Mode together with fast startup and measurement

cycles allows a very low average power consumption.

2 Key Features

360º contactless angular position encoding

Two digital 360 step (8.5 bit) absolute outputs: Serial interface

and Pulse width modulated (PWM) output

User programmable zero position and sensitivity

High speed: up to 76875 rpm

Direct measurement of magnetic field strength allows exact

determination of vertical magnet distance

Incremental Outputs ABI Quadrature: 90 ppr, step direction:

180ppr, fixed pulse width 360ppr

BLDC Outputs UVW, selectable for 1,2,3,4,5,6 pole pairs

Daisy-Chain mode for cascading of multiple sensors

9-bit multi turn counter

Low power mode with fast startup

Wide magnetic field input range: 20- 80 mT

Wide temperature range: -40ºC to +140ºC

Fully automotive qualified to AEC-Q100

Small Pb-free package: SSOP 20

3 Applications

The AS5134 is suitable for contactless rotary position sensing, rotary

switches (human machine interface), AC/DC motor position control

and Brushless DC motor position control.

Tracking ADC

& Angle

Decoder

Hall Array

Frontend

Amplifier

Power Management

OTP

Absolute

Serial

Interface

(SSI)

DIO

PWM

CLK

PROG

PWM Decoder

AGC

Mag

Zero

Pos.

AGC

Angle

Incremental

Interface

Commutation

Interface

U V W A B Index

VDD 5 V

GND

Multiturn

Counter

AS5134

Figure 1. AS5134 Magnetic Rotary Encoder Block Diagram

www.austriamicrosystems.com/AS5134 Revision 2.3 2 - 32

AS5134

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 Timing Characteristics .......................................................................................................................................................................... 6

7 Detailed Description.................................................................................................................................................................. 7

7.1 Connecting the AS5134........................................................................................................................................................................ 7

7.2 Serial 3-Wire R/W Connection.............................................................................................................................................................. 8

7.3 Serial 3-Wire Read-only Connection .................................................................................................................................................... 9

7.4 Serial 2-Wire Connection (R/W Mode) ............................................................................................................................................... 10

7.5 Serial 2-Wire Differential SSI Connection........................................................................................................................................... 11

7.6 1-Wire PWM Connection .................................................................................................................................................................... 12

7.7 Analog Output..................................................................................................................................................................................... 14

7.8 Quadrature A/B/Index Output............................................................................................................................................................. 14

7.9 Brushless DC Motor Commutation Mode........................................................................................................................................... 15

7.10 Daisy Chain Mode ............................................................................................................................................................................ 15

7.11 Serial Synchronous Interface (SSI) .................................................................................................................................................. 18

7.12 Redundancy ..................................................................................................................................................................................... 20

8 Application Information ........................................................................................................................................................... 21

8.1 AS5134 Programming ........................................................................................................................................................................ 21

8.1.1 OTP Programming Connection.................................................................................................................................................. 21

8.1.2 Programming Verification .......................................................................................................................................................... 22

8.2 AS5134 Status Indicators................................................................................................................................................................... 24

8.2.1 Lock Status Bit........................................................................................................................................................................... 24

8.2.2 Magnetic Field Strength Indicators ............................................................................................................................................ 24

8.3 Multi Turn Counter.............................................................................................................................................................................. 25

8.4 High Speed Operation ........................................................................................................................................................................ 25

8.4.1 Propagation Delay ..................................................................................................................................................................... 25

8.4.2 Digital Readout Rate.................................................................................................................................................................. 26

8.4.3 Low Power Mode ....................................................................................................................................................................... 26

9 Package Drawings and Markings ........................................................................................................................................... 27

9.1 Recommended PCB Footprint............................................................................................................................................................ 29

10 Ordering Information............................................................................................................................................................. 31