Single Chip 12-Bit Data Acquisition System

The LTC1293/4/6 is a family of data acquisition systems which contain a serial I/O successive approximation A/D converter. It uses LTCMOS™ 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.

The serial I/O is designed to communicate without external hardware to most MPU serial ports and all MPU parallel I/O ports allowing up to eight channels of data to be transmitted over as few as three wires.

Applications

* Resolution: 12 Bits

* Fast Conversion Time: 12µs Max Over Temp

* Low Supply Current: 6.0mA

* Software Programmable Features:

* Unipolar/Bipolar Conversion

* Differential/Single Ended Inputs

* MSB-First or MSB/LSB Data

* 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)