AS5055
Low Power 12-Bit Magnetic Rotary Encoder
1 General Description
The AS5055 is a single-chip magnetic rotary encoder IC with low
voltage and low power features.
It includes 4 integrated Hall elements, a high resolution ADC and a
smart power management controller.
The angle position, alarm bits and magnetic field information are
transmitted over a standard 3-wire or 4-wire SPI interface to the host
processor.
The AS5055 is available in a small QFN 16-pin 4x4x0.85 mm
package and specified over an operating temperature of -40ºC to
+85ºC.
2 Key Features
12-bit resolution
Standard SPI interface, 3 or 4 wire
3.0V to 3.6V core voltage, 1.8V to 3.6V peripheral supply
voltage
Automatic wake-up over SPI interface
Interrupt output for conversion complete indication
Low power mode:
- < 5mA (avg) @ 1ms readout interval
- < 500µA (avg) @ 10ms readout interval
- < 53µA (avg) @ 100ms readout interval
Small size 16-pin QFN (4x4x0.85 mm)
3 Applications
The device is ideal for Servo motor control, Input device for battery
operated portable devices, and Robotics.
Figure 1. AS5055 Block Diagram
AS5055
ADC
Hall Sensors
Power Management
SPI Interface
Cordic
EN_INT/
INT/
VDDp
VDD
VSS
Wire
mode
MOSI
MISO
SCK
SS/
www.ams.com/AS5055
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AMSCO [ AUSTRIAMICROSYSTEMS AG ]
