AS5147 Factsheet

DAEC™ Dynamic Angle
Error Compensation
www.ams.com/AS5147
AS5147 – Magnetic Rotary Position Sensor
We provide innovative
analog solutions to
- DAEC™ Dynamic Angle Error Compensation
- AEC-Q100 grade 0 automotive qualified
the most challenging
applications in sensor
- 14-bit resolution
and sensor interfaces,
- 11-bit binary incremental pulse count
power management,
and wireless.
- Programmable zero position
General Description
The AS5147 is a high-resolution rotary position sensor for fast absolute angle measurement over a full 360-degree range. This new position sensor is equipped with a revolutionary integrated dynamic angle error compensation (DAEC™) with almost 0 latency.
The robust design of the device suppresses the influence of any homogenous external
stray magnetic field. A standard 4-wire SPI serial interface allows a host microcontroller
to read 14-bit absolute angle position data from the AS5147 and to program non-
volatile settings without a dedicated programmer. The resolution of the ABI signal is
programmable to 2048 steps / 512 pulses per revolution or 1024 steps / 256 pulses per
revolution. The AS5147 has also a programmable UVW output and supports embedded
self-diagnostics features. The Dynamic Angle Error on the AS5147 device is accurate
from ±0.08° at 7,000rpm to ±0.17° at 14,500rpm. It comes in a 14 pin TSSOP package.
Benefits
Features
- Easy to use – saving costs on DSP
- High resolution for motor & position control
- Versatile choice of the interface
- No programmer needed (via SPI command)
- Supports safety challenging applications
- Lower system costs (no shielding)
- DAEC™ Dynamic angle error compensation
- 14-bit core resolution
-Independent output interfaces: SPI, ABI, UVW, PWM
- Zero position, configuration programmable
-Self-Diagnostics
- Immune to external stray field
DAEC™ Latency Comparison
Applications
- Brushless DC motor commutation
- Electric power steering (EPS)
- Transmission (gearbox, actuator)
-Pump
- Brake (actuator)
- Starter & alternator
latency ≈ 0°
No
Compensation
External
Compensation
Integrated
DAEC™
AS5147 Block Diagram
VDD3V3
AS5147
CSn
SCL
MISO
MOSI
Volatile Memory
SPI
VDD
OTP
LDO
ABI
Hall
Sensors
Analog
Front-End
A/D
AGC
ATAN
(CORDIC)
INTERPOLATOR
Dynamic Angle
Error
Compensation
UWV
A
B
I/PWM
U
V
W / PWM
PWM Decoder
Selectable
on I or W
GND
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© 05/2014 by ams
Subject to change without notice
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ams AG
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