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.
The LTC1293/4/6 family provides a 12‑bit successive‑approximation A/D converter with programmable unipolar or bipolar operation, up to eight input channels, and a 4‑wire serial interface compatible with most micro‑processors. Features include a built‑in sample‑and‑hold, low supply current (6 mA), and a maximum throughput of 46.5 kHz.
The document lists absolute maximum ratings, electrical characteristics, pin functions, typical performance curves, and package dimensions for the 16‑lead PDIP, 20‑lead PDIP, and surface‑mount SOL packages. The LTC1296 variant adds a system shutdown output pin for power‑down control.
| Resolution | 12 Bits |
|---|---|
| Maximum Throughput Rate | 46.5 kHz |
| Supply Current | 6.0 mA |
| Conversion Time | 12 µs |
| Input Voltage Range (single‑ended) | -0.3 V to VCC+0.3 V |
Yes, pin 19 is the System Shutdown Output that goes low when power shutdown is requested.