SA5777AN

INTEGRATED CIRCUITS SA5777A Dual air–core gauge driver Product specification Supersedes data of 1997 Feb 24 1999 Sep 20 Philips Semiconductors Philips Semiconductors Product specification Dual air-core gauge driver SA5777A 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. PIN CONFIGURATION N Package C1– C1+ AGND VBB 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 C2+ C2COM AGND DGND ST CS SCLK FEATURES DATAOUT DATAIN VCC OE 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 D Package C1– 1 C1+ 2 NC 3 NC 4 NC 5 AGND 6 28 27 26 25 24 23 22 21 20 19 18 17 16 15 C2+ C2NC NC COM AGND NC NC DGND ST NC NC CS SCLK Instrumentation utilizing air-core meters VBB 7 DATAOUT DATAIN 8 9 NC 10 NC 11...