RJM4988C · Programmable TPO Camshaft Position Sensor
Chopper-stabilized Hall with True Power-On (TPO) capability, supporting 5 kHz camshaft magnetic field detection. A single-chip integrated capacitor reduces BOM cost and PCB area.
Package outline
RJM4988C targets engine camshaft position sensing. A chopped Hall scheme measures the speed and phase of a target or pole wheel, with True Power-On (TPO) capability and AUTO TPO support for in-vehicle calibration.
An EEPROM stores algorithm options, the device ID and calibration parameters, and the built-in temperature-compensation data for the relative permeability of magnet material (−40°C ~ 150°C) accommodates different magnet materials and temperature conditions.
Datasheets & documents
Datasheets, application notes, user manuals and selection guides — each item is labelled with its type and how to get it. Public documents download directly; documents marked confidential require a separate request, and we will confirm your project details before releasing them.
Documents for this device are not published online yet
Datasheets, application notes, user manuals and selection guides can all be requested through the link below — our application engineers will respond within one working day. Public documents for released devices are being added to this page on an ongoing basis.
Request datasheet / documentsSpecifications
| Supply input range | 4V ~ 24V (max forward 24V/reverse -18 V) |
|---|---|
| Automotive grade | AEC-Q100 Grade 0 |
| Ambient temperature | -40°C ~ 150°C |
| Detection capability | Detects 5kHz camshaft magnetic field changes |
| Communication interface | Standard SMI digital communication plus single-bit 2.2 µs fast mode |
| Memory | EEPROM (algorithm options, ID and calibration parameters) |
| Package | TO94-A-3L with capacitor integrated in the package body |
Key features
- Capacitor integrated inside the chip reduces external PCB components, lowers BOM cost and improves EMC and robustness
- True Power-On (TPO) function with AUTO TPO support for in-vehicle calibration
- Improved switching levels and phase accuracy
- Built-in watchdog and microbreak functions combined with self-calibration algorithms support functional safety
- Back-bias magnet temperature coefficients are pre-programmed
- High immunity to ESD, EMC and mechanical stress
Typical applications
- Automotive: engine camshaft position sensing
- Automotive: engine timing phase measurement
Application areas
This device is used across the application areas below — open any of them for the full solution and recommended part numbers.