This document is about the user manual of CS8191 chip. The chip can be used to measure vehicle speed or engine RPM, and it has higher output torque and better output signal symmetry than other competitive parts (CS289, and LM1819). It is protected against short circuit and overvoltage (60 V) fault conditions.
The CS8191 is an integrated circuit specifically designed for use with 4-quadrant air-core meter movements. It incorporates an input comparator to sense frequency signals such as vehicle speed or engine RPM, a charge pump for frequency-to-voltage conversion, and a bandgap reference for stable operation.
The device includes a function generator with sine and cosine amplifiers that differentially drive the meter coils. This differential driving method provides higher torque output, better signal symmetry, faster response time, and reduced external component count compared to competitive parts.
| Operating Temperature Range | -40 to +105 °C |
|---|---|
| Junction Temperature Range | -40 to +150 °C |
| Overvoltage Protection | 60 V |
| Low Voltage Operation | 8.0 V |
| Input Frequency Range | 0 - 20 kHz |
It is specifically designed for use with 4 quadrant air—core meter movements.
Yes, it is protected against short circuit and overvoltage fault conditions.
The device is available in DIP-16, SO-20L, and DWF SUFFIX packages.