LTC6912 - Dual Programmable Gain Amplifiers with Serial Digital Interface

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. Operating from single or split supplies from 2.7V to 10.5V total, the LTC6912-X family is offered in tiny SSOP and DFN-12 Packages.

Features
  • 2 Channels with Independent Gain Control LTC6912-1: (0, 1, 2, 5, 10, 20, 50, and 100V/V) LTC6912-2: (0, 1, 2, 4, 8, 16, 32, and 64V/V)
  • Offset Voltage = 2mV Max (–40°C to 85°C)
  • Channel-to-Channel Gain Matching of 0.1dB Max
  • 3-Wire SPITM Interface
  • Extended Gain-Bandwidth at High Gains
  • Wired-OR Outputs Possible (2:1 Analog MUX Function)
  • Low Power Hardware Shutdown (GN-16 Only, 2µA Max at 2.7V)
  • Rail-to-Rail Input Range
  • Rail-to-Rail Output Swing
  • Single or Dual Supply: 2.7V to 10.5V Total
  • Input Noise: 12.6nV/√Hz
  • Total System Dynamic Range to 115dB
  • 16-Pin GN (SSOP) or 12-Pin DFN Package Options
Typical Application
LTC6912 Typical Application
LTC6912 Typical Application
Applications
  • Data Acquisition Systems
  • Dynamic Gain Changing
  • Automatic Ranging Circuits
  • Automatic Gain Control
Packaging
LTC6912 Package Drawing
LTC6912 Package Drawing
Order Information
Part NumberPackageTempPrice(1-99)Price (1k)*
LTC6912CDE-1#PBF4x3 DFN-12C$3.29$2.30
LTC6912CDE-1#TRPBF4x3 DFN-12C$2.36
LTC6912CDE-2#PBF4x3 DFN-12C$3.29$2.30
LTC6912CDE-2#TRPBF4x3 DFN-12C$2.36
LTC6912CGN-1#PBFSSOP-16C$3.07$2.15
LTC6912CGN-1#TRPBFSSOP-16C$2.21
LTC6912CGN-2#PBFSSOP-16C$3.07$2.15
LTC6912CGN-2#TRPBFSSOP-16C$2.21
LTC6912HGN-1#PBFSSOP-16H$3.79$2.65
LTC6912HGN-1#TRPBFSSOP-16H$2.71
LTC6912HGN-2#PBFSSOP-16H$3.79$2.65
LTC6912HGN-2#TRPBFSSOP-16H$2.71
LTC6912IDE-1#PBF4x3 DFN-12I$3.86$2.70
LTC6912IDE-1#TRPBF4x3 DFN-12I$2.76
LTC6912IDE-2#PBF4x3 DFN-12I$3.86$2.70
LTC6912IDE-2#TRPBF4x3 DFN-12I$2.76
LTC6912IGN-1#PBFSSOP-16I$3.64$2.55
LTC6912IGN-1#TRPBFSSOP-16I$2.61
LTC6912IGN-2#PBFSSOP-16I$3.64$2.55
LTC6912IGN-2#TRPBFSSOP-16I$2.61
Demo Boards
Part NumberDescriptionPrice
DC861A-ALTC6912 Dual Digitally Controlled PGA / Programmable Data Acquisition Measurement and Control System$75.00
DC861A-BLTC6912 Dual Digitally Controlled PGA / Programmable Data Acquisition Measurement and Control System$75.00
Datasheet
Reliability Data
CAD Symbol
Related Products
LTC6912 - Dual Programmable Gain Amplifiers with Serial Digital Interface
R465 Reliability Data
LTC6912 Footprints and Symbols