The LTC1290 is a single-chip 12-bit data acquisition system from Linear Technology that uses LTCMOS 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). All single-ended input channels include an on-chip sample-and-hold. When the LTC1290 is idle, it can be powered down with a serial word in applications where low power consumption is desired. The serial I/O is designed to be compatible with microprocessors.
The LTC1290 is a single‑chip 12‑bit data acquisition system that provides eight analog input channels, selectable single‑ended or differential configurations, and programmable output word lengths of 8, 12, or 16 bits. It uses LTCMOS switched‑capacitor technology and includes an on‑chip sample‑and‑hold for all single‑ended inputs.
The device communicates via a standard full‑duplex serial interface, supports both MSB‑first and LSB‑first data ordering, and can be powered down with a serial command to reduce supply current for low‑power applications.
| Resolution | 12 bits |
|---|---|
| Maximum Throughput Rate | 50 kHz |
| Input Range (Differential) | -5 V to +5 V |
The typical maximum ACLK frequency is 4 MHz, but it can reach up to 5 MHz when the source resistance is 1 kΩ.
Yes, the serial interface allows either MSB‑first or LSB‑first data sequencing.
It supports four differential or eight single‑ended inputs, or any combination thereof.