DESCRIPTION
The LTC1293/4/6 is a family of data acquisition systems which contain a serial I/O successive approximation A/D converter. It uses LTCMOSTM switched capacitor technology to perform either 12-bit unipolar, or 11-bit plus sign bipolar A/D conversions. The input multiplexer can be configured for either single ended or differential inputs (or combinations thereof). An on-chip sample and hold is included for all single ended input channels. When the LTC1293/4/6 is idle it can be powered down in applications where low power consumption is desired. The LTC1296 includes a System Shutdown Output pin which can be used to power down external circuitry, such as signal conditioning circuitry prior to the input mux.

FEATURES
■ Software Programmable Features
   Unipolar/Bipolar Conversion
   Differential/Single Ended Inputs
   MSB-First or MSB/LSB Data Sequence
   Power Shutdown
■ Built-In Sample and Hold
■ Single Supply 5V or ±5V Operation
■ Direct 4-Wire Interface to Most MPU Serial Ports and All MPU Parallel Ports
■ 46.5kHz Maximum Throughput Rate
■ System Shutdown Output (LTC1296)

KEY SPECIFICATIONS
■ Resolution ..................................................... 12 Bits
■ Fast Conversion Time ............ 12µs Max Over Temp.
■ Low Supply Current........................................ 6.0mA