LTC1293 Datasheet | Linear Technology

LTC1293/LTC1294/LTC1296 Single Chip 12-Bit Data Acquisition System UO U 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 - 46.5k Hz Maximum Throughput Rate - System Shutdown Output (LTC1296) KEY SPECIFICATIO S - Resolution: 12 Bits - Fast Conversion Time: 12µs Max Over Temp - Low Supply Current: 6.0m A DESCRIPTIO 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 binations 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 municate 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. LTCMOSTM is a trademark of Linear Technology Corporation TYPICAL APPLICATI 12-Bit Data Acquisition System with Power Shutdown RB 5.1k 2N3906 R1 10k 350Ω STRAIN GAUGE BRIDGE + 1/4 LT1014 - R2 1.2M C2 1µF THREE ADDITIONAL STRAIN GAUGE INPUTS CAN BE ACMODATED USING THE OTHER AMPLIFIERS IN THE...