AC-coupled differential Hall-effect gear-tooth sensor
MLX90254 Melexis
The MLX90254 is an AC-coupled differential gear-tooth sensor which targets automotive crankshaft applications.
Top features
Not recommended for new design.-
Differential Hall-effect gear-tooth sensor
-
AC-coupled
-
Low consumption
-
Operation from 15-20 Hz
-
Distance between Hall plates: 2.25 mm
-
Excellent repeatability (jitter) performance
-
Large air-gap range
-
Large supply voltage range
- 4-SIP-VA package (through-hole)
Product description
The MLX90254 is an AC-coupled differential gear-tooth sensor which targets automotive crankshaft applications. It is designed to be used with a back bias magnet to sense the rotating speed (incremental position) of a ferrous toothwheel. Alternatively, the MLX90254 can also be used to sense the rotating speed of a magnetic encoder.
The AC-coupling is realized through an on-chip capacitor implementing a high-pass filter. This filter prevents a zero-speed operation but it enables a continuous-time operation (no sampling) and consequently a high sensitivity (low hysteresis) and repeatability (jitter).
Its low hysteresis enables it to operate over a wide range of air-gap and a broad temperature range (from -40 °C to 150 °C).
The device has an open-drain output (low-side) which is short-circuit protected.
Features and benefits
-
Differential Hall-effect gear-tooth sensor
-
AC-coupled
-
Low consumption
-
Operation from 15-20 Hz
-
Distance between Hall plates: 2.25 mm
-
Excellent repeatability (jitter) performance
-
Large air-gap range
-
Large supply voltage range
- 4-SIP-VA package (through-hole)
