DESCRIPTION
The LTC®6911 is a family of low noise digitally programmable gain amplifiers (PGAs) that are easy to use and occupy very little PC board space. The matched gain of both channels is adjustable using a 3-bit parallel interface to select voltage gains of 0, 1, 2, 5, 10, 20, 50 and 100V/ V (LTC6911-1) and 0, 1, 2, 4, 8, 16, 32 and 64V/V (LTC6911-2). All gains are inverting.
The LTC6911 family consists of two matched inverting 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. Operating from single or split supplies from 2.7V to 10.5V, the LTC6911 family is offered in a 10-lead MSOP package.

FEATURES
■ 3-Bit Digital Gain Control:
   (Inverting Gains of 0, 1, 2, 5, 10, 20, 50
   and 100V/V) -1 Option
   (Inverting Gains of 0, 1, 2, 4, 8, 16, 32
   and 64V/V) -2 Option
■ Two Matched Programmable Gain Amplifiers
■ Channel-to-Channel Gain Matching of 0.1dB (Max)
■ Rail-to-Rail Input Range
■ Rail-to-Rail Output Swing
■ Single or Dual Supply: 2.7V to 10.5V Total
■ 11MHz Gain Bandwidth Product
■ Input Noise: 10nV/√Hz
■ Total System Dynamic Range to 120dB
■ Input Offset Voltage: 2mV, Gain of 10
■ Low Profile 10-Lead MSOP Package

APPLICATIONS
■ Data Acquisition Systems
■ Dynamic Gain Changing
■ Automatic Ranging Circuits
■ Automatic Gain Control