Description
The CS4172 is a monolithic BiCMOS integrated circuit used to translate a digital 10-bit word from a microprocessor/microcontroller to complementary DC outputs. The DC outputs drive an air-core meter commonly used in vehicle instrument panels. The 10 bits of data are used to linearly control the quadrature coils of the meter directly with a 0.35° resolution and ±1.0¡ accuracy over the full 360¡ range of the gauge. The interface from the microcontroller is by a Serial Peripheral Interface (SPI) compatible serial connection using up to a 2MHz shift clock rate.

Features
■ Serial Input Bus
■ 2 MHz Operating Frequency
■ Tangential Drive Algorithm
■ 80mA Drive Circuits
■ 0.5° Accuracy (Typ.)
■ Power-On-Reset
■ Protection Features
    Output Short Circuit
    Overtemperature