The MAX9924–MAX9927 variable reluctance (VR or mag- netic coil) sensor interface devices are ideal for position and speed sensing for automotive crankshafts, camshafts, transmission shafts, etc.
The MAX9924–MAX9927 variable reluctance (VR) sensor interface devices are designed for position and speed sensing in automotive applications such as crankshafts, camshafts, and transmission shafts. They integrate a precision amplifier and comparator with selectable adaptive peak threshold and zero‑crossing circuits to provide robust output pulses even in noisy environments.
The devices are offered in two package types (10‑pin µMAX for MAX9924/5 and 16‑pin QSOP for MAX9926/7) and operate over an automotive temperature range of –40 °C to +125 °C. Detailed electrical characteristics, pin descriptions, and functional diagrams are provided for designers.
| Operating Supply Range (VCC) | 4.5 V – 5.5 V |
|---|---|
| Operating Temperature Range | -40 °C to +125 °C |
| Package Types | 10‑pin µMAX (MAX9924/5), 16‑pin QSOP (MAX9926/7) |
The differential amplifiers in the MAX9924 and MAX9926 provide a fixed gain of 1 V/V.
The MAX9924 operates with a supply voltage between 4.5 V and 5.5 V.
The MAX9924 and MAX9925 are offered in a 10‑pin µMAX package, while the MAX9926 and MAX9927 use a 16‑pin QSOP package.
All devices are specified for operation from –40 °C to +125 °C.