DESCRIPTION

The SA5777A is a monolithic driver for controlling air-core (or differential) meters typically used in automotive instrument cluster applications. The circuit interfaces with a microprocessor through a serial bus and directly drives the air-core meter. The SA5777A has 10-bit resolution (0.35 degree) and is guaranteed to be monotonic. Data can be shifted through the part, allowing several SA5777As to be cascaded with only one chip-select line. On-chip current shut down logic protects the circuit from external faults.

FEATURES

• 10-Bit resolution (0.35 degrees)

• Exceptional accuracy (0.5 degrees, typical)

• High-torque capability

• Active differential drivers eliminate back-EMF issues

• No RFI/EMI generation issues

• Simple serial interface

• Simple cascading capability for multiple meters

• Internal fault protection

• Only one external component required (bypass capacitor)

APPLICATION

• Instrumentation utilizing air-core meters