DESCRIPTION
The LTC®1289 is a 3V data acquisition component which contains a serial I/O successive approximation A/D converter. The device specifications are guaranteed at a supply voltage of 2.7V. It uses LTCMOSTM switched capacitor technology to perform a 12-bit unipolar, or 11-bit plus sign bipolar A/D conversion. 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 LTC1289 is idle it can be powered down in applications where low power consumption is desired.

FEATURES
■ Single Supply 3.3V or ±3.3V Operation
■ Software Programmable Features
   Unipolar/Bipolar Conversions
   4 Differential/8 Single-Ended Inputs
   Variable Data Word Length
   Power Shutdown
■ Built-In Sample-and-Hold
■ Direct 4-Wire Interface to Most MPU Serial Ports and All MPU Parallel Ports
■ 25kHz Maximum Throughput Rate
■ Available in 20-Lead PDIP and 20-Lead SW Packages

APPLICATIONS
■ Minimum Guaranteed Supply Voltage: 2.7V
■ Resolution: 12 Bits
■ Fast Conversion Time: 26µs Max Over Temp
■ Low Supply Currents: 1.0mA