AS5045-ASSU

AS5045-ASSU Datasheet

AS5045

Part	Datasheet
AS5045-ASSU	AS5045-ASSU (pdf)

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AS5045 12 Bit Programmable Magnetic Rotary Encoder Data Sheet 1 General Description The AS5045 is a contactless magnetic rotary encoder for accurate angular measurement over a full turn of 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 magnet may be placed above or below the IC. An internal voltage regulator allows the AS5045 to operate at either V or 5 V supplies. 2 Benefits Complete system-on-chip Flexible system solution provides absolute and PWM outputs simultaneously Ideal for applications in harsh environments due to contactless position sensing No calibration required 3 Key Features Contactless high resolution rotational position encoding over a full turn of 360 degrees Two digital 12bit absolute outputs - Serial interface and - Pulse width modulated PWM output User programmable zero position Failure detection mode for magnet placement monitoring and loss of power supply “red-yellow-green” indicators display placement of magnet in Z-axis Serial read-out of multiple interconnected AS5045 devices using Daisy Chain mode Tolerant to magnet misalignment and airgap variations Wide temperature range - 40°C to + 125°C Small Pb-free package SSOP 16 5.3mm x 6.2mm 4 Applications Industrial applications - Contactless rotary position sensing - Robotics Automotive applications - Steering wheel position sensing - Transmission gearbox encoder - Headlight position control - Torque sensing - Valve position sensing Replacement of high end potentiometers Figure Typical Arrangement of AS5045 and Magnet AS5045 Data Sheet Table of Contents General Description 1 Key Features 1 Applications 1 Pinout 4 Pin Configuration 4 Pin 4 Electrical 5 AS5045 Differences to AS5040 5 Absolute Maximum Ratings non operating 6 Operating Conditions 6 DC Characteristics for Digital Inputs and 7 CMOS Schmitt-Trigger Inputs CLK, CSn. CSn = internal 7 CMOS / Program Input 7 CMOS Output Open Drain MagINCn, MagDECn 7 CMOS Output PWM 7 Ordering Information Recommended PCB Footprint AS5045 Data Sheet 5 Pinout Pin Configuration Figure Pin Configuration SSOP16 MagINCn MagDECn Mode Prog_DI AS5045 VDD5V VDD3V3 Pin Description Table 1 shows the description of each pin of the standard SSOP16 package Shrink Small Outline Package, 16 leads, body size 5.3mm x 6.2mmm see Figure Pins 7, 15 and 16 supply pins, pins 3, 4, 5, 6, 13 and 14 are for internal use and must not be connected. Pins 1 and 2 MagINCn and MagDECn are the magnetic field change indicators magnetic field strength increase or decrease through variation of the distance between the magnet and the device . These outputs can be used to detect the valid magnetic field range. Furthermore those indicators can also be used for contact-less push-button functionality. Pin 6 Mode allows switching between filtered slow and unfiltered fast mode . This pin must be tied to VSS or VDD5V, and must not be switched after power up. See chapter 8 Mode Input Pin. Pin 8 Prog is used to program the zero-position into the OTP see chapter Zero Position Programming . This pin is also used as digital input to shift serial data through the device in Daisy Chain configuration, see chapter Daisy Chain Mode . Pin 11 Chip Select CSn active low selects a device within a network of AS5045 encoders and initiates serial data transfer. A logic high at CSn puts the data output pin DO to tri-state and terminates serial data transfer. This pin is also used for alignment mode Figure 14 and programming mode Figure Pin 12 PWM allows a single wire output of the 10-bit absolute position value. The value is encoded into a pulse width modulated signal with 1µs pulse width per step 1µs to 4096µs over a full turn . By using an external low pass filter, the digital PWM signal is converted into an analog voltage, making a direct replacement of potentiometers possible. Table Pin Description Type MagINCn DO_OD MagDECn DO_OD Magnet Field Magnitude INCrease active low, indicates a distance reduction between the magnet and the device surface. See Table 5 Magnet Field Magnitude DECrease active low, indicates a distance increase between the device and the magnet. See Table 5 Must be left unconnected Must be left unconnected AS5045 Data Sheet Type Must be left unconnected Mode Select between slow low, VSS and fast high, VDD5V mode. Internal pull-down resistor. Negative Supply Voltage GND Prog_DI DI_PD OTP Programming Input and Data Input for Daisy Chain mode. Internal pulldown resistor ~74kΩ . Connect to VSS if not used DO_T Data Output of Synchronous Serial Interface 10 CLK DI, ST Clock Input of Synchronous Serial Interface Schmitt-Trigger input 11 CSn DI_PU, ST Chip Select, active low Schmitt-Trigger input, internal pull-up resistor ~50kΩ 19 Ordering Information Delivery: Tape and Reel 1 reel = 2000 devices Tubes 1 box = 100 tubes à 77 devices Order # AS5045ASSU for delivery in tubes Order # AS5045ASST for delivery in tape and reel 31 33 AS5045 Data Sheet 20 Recommended PCB Footprint Figure Recommended PCB Footprint Table Recommended Footprint Data Recommended Footprint Data inch 32 33 AS5045 Data Sheet Copyrights Copyright 1997-2010, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01 For Sales Offices, Distributors and Representatives, please visit:

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AS5045
12 Bit Programmable Magnetic Rotary Encoder

Data Sheet
1 General Description

The AS5045 is a contactless magnetic rotary encoder for accurate angular measurement over a full turn of 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 magnet may be placed above or below the IC.

An internal voltage regulator allows the AS5045 to operate at either V or 5 V supplies.
2 Benefits

Complete system-on-chip Flexible system solution provides absolute and

PWM outputs simultaneously Ideal for applications in harsh environments due to
contactless position sensing No calibration required
3 Key Features

Contactless high resolution rotational position encoding over a full turn of 360 degrees

Two digital 12bit absolute outputs - Serial interface and - Pulse width modulated PWM output

User programmable zero position Failure detection mode for magnet placement
monitoring and loss of power supply “red-yellow-green” indicators display placement of
magnet in Z-axis Serial read-out of multiple interconnected AS5045
devices using Daisy Chain mode Tolerant to magnet misalignment and airgap
variations Wide temperature range - 40°C to + 125°C Small Pb-free package SSOP 16 5.3mm x 6.2mm
4 Applications

Industrial applications - Contactless rotary position sensing - Robotics

Automotive applications - Steering wheel position sensing - Transmission gearbox encoder - Headlight position control - Torque sensing - Valve position sensing

Replacement of high end potentiometers

Figure Typical Arrangement of AS5045 and Magnet

AS5045 Data Sheet

Table of Contents

General Description 1

Key Features 1

Applications 1

Pinout 4

Pin Configuration 4

Pin 4

Electrical 5

AS5045 Differences to AS5040 5

Absolute Maximum Ratings non operating 6

Operating Conditions 6

DC Characteristics for Digital Inputs and 7

CMOS Schmitt-Trigger Inputs CLK, CSn. CSn = internal 7

CMOS / Program Input 7

CMOS Output Open Drain MagINCn, MagDECn 7

CMOS Output PWM 7
Ordering Information

Recommended PCB Footprint

AS5045 Data Sheet
5 Pinout

Pin Configuration

Figure Pin Configuration SSOP16

MagINCn

MagDECn

Mode

Prog_DI

AS5045

VDD5V

VDD3V3

Pin Description

Table 1 shows the description of each pin of the standard SSOP16 package Shrink Small Outline Package, 16 leads, body size 5.3mm x 6.2mmm see Figure Pins 7, 15 and 16 supply pins, pins 3, 4, 5, 6, 13 and 14 are for internal use and must not be connected. Pins 1 and 2 MagINCn and MagDECn are the magnetic field change indicators magnetic field strength increase or decrease through variation of the distance between the magnet and the device . These outputs can be used to detect the valid magnetic field range. Furthermore those indicators can also be used for contact-less push-button functionality. Pin 6 Mode allows switching between filtered slow and unfiltered fast mode . This pin must be tied to VSS or VDD5V, and must not be switched after power up. See chapter 8 Mode Input Pin. Pin 8 Prog is used to program the zero-position into the OTP see chapter Zero Position Programming .

This pin is also used as digital input to shift serial data through the device in Daisy Chain configuration, see chapter Daisy Chain Mode .

Pin 11 Chip Select CSn active low selects a device within a network of AS5045 encoders and initiates serial data transfer. A logic high at CSn puts the data output pin DO to tri-state and terminates serial data transfer. This pin is also used for alignment mode Figure 14 and programming mode Figure

Pin 12 PWM allows a single wire output of the 10-bit absolute position value. The value is encoded into a pulse width modulated signal with 1µs pulse width per step 1µs to 4096µs over a full turn . By using an external low pass filter, the digital PWM signal is converted into an analog voltage, making a direct replacement of potentiometers possible.

Table Pin Description

Type

MagINCn DO_OD

MagDECn DO_OD

Magnet Field Magnitude INCrease active low, indicates a distance reduction between the magnet and the device surface. See Table 5 Magnet Field Magnitude DECrease active low, indicates a distance increase between the device and the magnet. See Table 5

Must be left unconnected

Must be left unconnected

AS5045 Data Sheet

Type

Must be left unconnected

Mode

Select between slow low, VSS and fast high, VDD5V mode. Internal pull-down resistor.

Negative Supply Voltage GND

Prog_DI

DI_PD

OTP Programming Input and Data Input for Daisy Chain mode. Internal pulldown resistor ~74kΩ . Connect to VSS if not used

DO_T

Data Output of Synchronous Serial Interface
10 CLK

DI, ST

Clock Input of Synchronous Serial Interface Schmitt-Trigger input
11 CSn

DI_PU, ST Chip Select, active low Schmitt-Trigger input, internal pull-up resistor ~50kΩ
19 Ordering Information

Delivery:

Tape and Reel 1 reel = 2000 devices Tubes 1 box = 100 tubes à 77 devices

Order # AS5045ASSU for delivery in tubes Order # AS5045ASST for delivery in tape and reel
31 33

AS5045 Data Sheet
20 Recommended PCB Footprint

Figure Recommended PCB Footprint

Table Recommended Footprint Data

Recommended Footprint Data
inch
32 33

AS5045 Data Sheet

Copyrights

Copyright 1997-2010, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies.

Disclaimer

Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or lifesustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services.

Contact Information

Headquarters austriamicrosystems AG A-8141 Schloss Premstaetten, Austria Tel +43 0 3136 500 0 Fax +43 0 3136 525 01

For Sales Offices, Distributors and Representatives, please visit:

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived AS5045-ASSU Datasheet file may be downloaded here without warranties.

Datasheet ID: AS5045-ASSU 519744