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AS5145B

austriamicrosystems AG
Part Number AS5145B
Manufacturer austriamicrosystems AG
Description 12-Bit Programmable Magnetic Rotary Encoder
Published Mar 14, 2010
Detailed Description Data Sheet AS5145/AS5145A/AS5145B 1 2 - B i t P r o g r a m m a b l e M a g n etic R otary Enco der www.DataSheet4U.com...
Datasheet PDF File AS5145B PDF File

AS5145B
AS5145B

Overview
Data Sheet AS5145/AS5145A/AS5145B 1 2 - B i t P r o g r a m m a b l e M a g n etic R otary Enco der www.
DataSheet4U.
com 1 General Description The AS5145 is a contact less magnetic rotary encoder for accurate angular measurement over a full turn of 360 degrees.
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.
The absolute angle measurement provides instant indication of the magnet’s angular position with a resolution of 0.
0879º = 4096 positions per revolution.
This digital data is available as a serial bit stream and as a PWM signal.
An internal voltage regulator allows the AS5145 to operate at either 3.
3V or 5V supplies.
Three incremental outputs Quadrature A/B (10 or 12 bit) and Index output signal (preprogrammed versions available AS5145A for 10 bit and AS5145B for 12 bit) 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 Zaxis Serial read-out of multiple interconnected AS5145 devices using Daisy Chain mode Tolerant to magnet misalignment and gap variations Wide temperature range: - 40ºC to +150ºC Fully automotive qualified to AEC-Q100, grade 0 Small Pb-free package: SSOP 16 (5.
3mm x 6.
2mm) 2 Key Features Contact less high resolution rotational position encoding over a full turn of 360 degrees Two digital 12 bit absolute outputs: - Serial interface - Pulse width modulated (PWM) output 3 Applications The device is ideal for industrial applications like contactless rotary position sensing and robotics; automotive applications like steering wheel position sensing, transmission gearbox encoder, head light position control, torque sensing, valve position sensing and replacement of high end potentiometers.
Figure 1.
A...


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