AS5047U - High Resolution Rotary Position Sensor
14-bit on-axis magnetic rotary position sensor with up to 14-bit binary incremental pulse count
Features
- DAEC ™ Dynamic angle error compensation
- DFS ™ Dynamic filter system
- Magnetic stray field immunity
- Independent output interfaces: SPI, ABI, UVW, PWM
Benefits
- Easy to use – saving costs on DSP
- Higher durability and lower system costs (no shield needed)
- Versatile choice of the interface
Product parameters
Resolution [bit] | 14 |
---|---|
Interface | |
Output | SPI, ABI, UVW, PWM |
Max. Speed [rpm] | 28000 |
Overvoltage Protection | |
Redundant | |
Supply Voltage [V] | 3.3 or 5.0 |
Temperature Range [°C] | -40 to +125 |
Package | TSSOP-14 |
Automotive Qualified | No |
Longevity Program | January 2031 |
General description
The AS5047U 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 revolutionary integrated dynamic angle error compensation (DAEC™) with almost 0 latency at higher rotational speed. For increased signal quality at lower rotational speed, the dynamic filter system (DFS ™) reduces transition noise.
The robust design of the device suppresses the influence of any
homogenous external stray magnetic field. A standard 4-wire
SPI serial interface with a CRC protection allows a host
microcontroller to read 14-bit absolute angle position data
from the AS5047U and to program non-volatile settings without
a dedicated programmer.
Incremental movements are indicated on a set of ABI signals
with a maximum resolution of 16989 steps / 4096 pulses per
revolution.
Brushless DC (BLDC) motors are controlled through a standard
UVW commutation interface with a programmable number of
pole pairs from 1 to 7. The absolute angle position is also
provided as PWM-encoded output signal.
AS5047U are single die sensors and are available in a TSSOP14
Package.
With two decades of magnetic sensor system know-how, we have broad experience in selecting the most suitable magnets. ams experts recommend the following magnet suppliers.

This product suits for the following applications:
- - Factory automation
- - Building automation
- - Robotics
- - PMSM (permanent magnet synchronous motor)
- - Stepper motor closed loop
- - Optical encoder replacement

Tools
Title | Category | Headline | Buy |
---|---|---|---|
AS5x47SocketBoard | Application Board | Socket Board for AS5x47 | |
AS5x47UAdapterBoard | Application Board | Adapter Board for AS5x47U | |
SD4Y-PP | Accessories | Production Programmer SD4Y | |
USBI&PBox | Accessories | USB I&P Box for I2C/SPI | |
AS5x47UMotorBoard | Application Board | Motor Board for AS5x47U |
Technical documents
Type | Description | Language | ||
---|---|---|---|---|
Datasheet | AS5047U Datasheet version 1-01 | English | ||
Application Note | Description of adaptive filter | English | ||
Application Note | Dynamic Angle Error Compensation Description | English | ||
Application Note | Zero Position Programming in Motor Control Application | English | ||
Application Note | AN5000 Magnet Selection Guide v1-04 | English | ||
Application Note | USB Interface & Programming Box | English | ||
User Guide | AS5x47U Motor Board | English |
Notifications
Type | Description | Language | ||
---|---|---|---|---|
Product Change Notification | PCN38-2018 (AS50xx, AS51xx, AS52xx, AS54xx, AS8xxx) | English |
Other information
Type | Description | Language | ||
---|---|---|---|---|
Block Diagram | Block Diagram of AS5047U | English | ||
Factsheet | Contactless Magnetic Position Sensing for Motor Control | English | ||
Factsheet | Position Sensors Family Overview | English | ||
Image | ASXXXX On-Axis TSSOP14 Magnetic Field Lines |