DESCRIPTION
The LTC®1290 is a data acquisition component which contains 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 8-channel 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 LTC1290 is idle it can be powered down with a serial word in applications where low power consumption is desired.

FEATURES
■ Software Programmable Features
   – Unipolar/Bipolar Conversion
   – Four Differential/Eight Single-Ended Inputs
   – MSB- or LSB-First Data Sequence
   – Variable Data Word Length
   – Power Shutdown
■ Built-In Sample-and-Hold
■ Single Supply 5V or ±5V Operation
■ Direct Four-Wire Interface to Most MPU Serial Ports
   and All MPU Parallel Ports
■ 50kHz Maximum Throughput Rate