The LTC6912 is a family of dual channel, low noise, digitally programmable gain amplifiers (PGA) that are easy to use and occupy very little PC board space. The gains for both channels are independently programmable using a 3-wire SPI interface to select voltage gains of 0, 1, 2, 5, 10, 20, 50, and 100V/V (LTC6912-1 ); and 0, 1, 2, 4, 8, 16, 32, and 64V/V (LTC6912-2). All gains are inverting. The LTC6912 family consists of 2 matched amplifiers with rail-to-rail outputs. When operated with unity gain, they will also process rail-to-rail input signals. A half-supply reference generated internally at the AGND pin supports single power supply applications.
The LTC6912 family consists of dual‑channel, low‑noise, digitally programmable gain amplifiers with independent gain control for each channel. They operate from a single or split supply (2.7 V to 10.5 V) and feature a 3‑wire SPI interface, rail‑to‑rail input and output, and low‑power shutdown.
The document lists absolute maximum ratings, detailed electrical characteristics, gain‑setting tables, noise performance, package dimensions (16‑lead SSOP and 12‑lead DFN), and a typical 2:1 PGA MUX application. Related parts and ordering information are also included.
| Supply Voltage Range | 2.7 V to 10.5 V |
|---|---|
| Offset Voltage (max) | 2 mV |
| Gain Settings (LTC6912‑1) | 0, 1, 2, 5, 10, 20, 50, 100 V/V |
| Gain Settings (LTC6912‑2) | 0, 1, 2, 4, 8, 16, 32, 64 V/V |
The LTC6912 can be powered up to 10.5 V.
It offers eight gain settings: 0, 1, 2, 5, 10, 20, 50, and 100 V/V.
The maximum offset voltage is specified as 2 mV.