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AS5311

austriamicrosystems AG
Part Number AS5311
Manufacturer austriamicrosystems AG
Description High Resolution Magnetic Linear Encoder
Published Mar 14, 2010
Detailed Description AS5311 Data Sheet www.DataSheet4U.com AS5311 High Resolution Magnetic Linear Encoder 1 General Description The AS5311 ...
Datasheet PDF File AS5311 PDF File

AS5311
AS5311


Overview
AS5311 Data Sheet www.
DataSheet4U.
com AS5311 High Resolution Magnetic Linear Encoder 1 General Description The AS5311 is a contactless high resolution magnetic linear encoder for accurate linear motion and off-axis rotary sensing with a resolution down to <0.
5µm.
It is a system-on-chip, combining integrated Hall elements, analog front end and digital signal processing on a single chip, packaged in a small 20-pin TSSOP package.
A multi-pole magnetic strip or ring with a pole length of 1.
0mm is required to sense the rotational or linear motion.
The magnetic strip is placed above the IC at a distance of typ.
0.
3mm.
The absolute measurement provides instant indication of the magnet position within one pole pair with a resolution of 488nm per step (12-bit over 2.
0mm).
This digital data is available as a serial bit stream and as a PWM signal.
Furthermore, an incremental output is available with a resolution of 1.
95 µm per step.
An index pulse is generated once for every pole pair (once per 2.
0mm).
The travelling speed in incremental mode is up to 650mm/second.
An internal voltage regulator allows the AS5311 to operate at either 3.
3 V or 5 V supplies.
Depending on the application the AS5311 accepts multi-pole strip magnets as well as multi-pole ring magnets, both radial and axial magnetized (see Figure 1 and Figure 3).
Figure 1: AS5311 with Multi-pole Magnetic Strip for Linear Motion Sensing Preliminary Data Sheet The AS5311 is available in a Pb-free TSSOP-20 package and qualified for an ambient temperature range from -40°C to +125°C.
2 Key Features ƒ Two 12-bit digital absolute outputs : - Serial interface and - Pulse width modulated (PWM) output Incremental output with Index “red-yellow-green” indicators monitor magnet placement over the chip ƒ ƒ 3 Applications ƒ ƒ ƒ ƒ Micro-Actuator feedback Servo drive feedback Robotics Replacement of optical encoders Figure 2: Block Diagram of AS5311 VDD3V3 MagINCn VDD5V MagDECn PWM Sin Ang DO Cos Mag CSn CLK A B AS5311 Ind...


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