Features
- Voltage supply: 3.3V±0.3V or 5.0V±0.5V
- AEC-Q100 Grade 0 qualified (-40°C to +160°C)
- ISO 26262 compliant, fulfilling FuSa requirements up to single-chip ASIL-D at the system level
- Output interfaces: high-speed UART up to 2Mbit/s, SENT 14-bit
- Single IC supports on-axis and off-axis rotation, linear and arc motion
- Automatic gain control (AGC) to compensate for air-gap variations
- Propagation delay: 2µs
- Rotational speed: up to 600,000 (electrical) rpm
- Autocalibration and 16-point linearization for enhanced accuracy
- Overvoltage ±18V, reverse-polarity ±18V, ESD, and short-circuit protection features
- On-chip failure diagnostics
- External auxiliary sensor input
- Fully customizable sensing element design using the Renesas Inductive Position Sensor Coil Optimizer tool
Description
The RAA2P4520 is a high-speed, magnet-free inductive position sensor IC designed for absolute rotary position sensing in safety-critical automotive motor control applications. It operates on the principle of eddy currents, detecting the position of a simple metallic target moving above a set of coils, consisting of one transmitter coil and four receiver coils.
This configuration enables precise and redundant measurement of two independent angles. The device supports a high-speed single-wire UART interface with data rates up to 2 Mbit/s, as well as a 14-bit SENT output, offering flexible and efficient communication with automotive ECUs.
With support for safety requirements up to ASIL-D, the RAA2P4520 is ideally suited for demanding applications such as traction motor position sensing, starter generators, brake booster motor position sensors, electric power steering (EPS), steering angle and torque sensors, and front and rear wheel actuators.
Parameters
| Attributes | Value |
|---|---|
| Function | Position Sensor |
| Resolution (bits) | 14 |
| Supply Voltage (V) | 3.3 - 5 |
| Interface | SENT, UART |
| Temp. Range (°C) | -40 to 160°C |
Package Options
| Pkg. Type | Pkg. Dimensions (mm) | Lead Count (#) | Pitch (mm) |
|---|---|---|---|
| TSSOP | 5.0 x 4.4 x 1.0 | 16 | 0.65 |
Application Block Diagrams
 | Hands-Off Detection (HOD) & Steering Switch System Autonomous driving steering system featuring hands-off detection, heating, and touch interaction. |
 | Steering Angle Sensor High-precision, magnet-free inductive sensor for contactless position detection. |
Additional Applications
- Traction motor position sensing
- Starter generators
- Brake booster motor position sensors
- Electric power steering (EPS)
- Steering angle sensors (SAS)
- Torque sensors
- Front wheel actuators
- Rear wheel steering systems