LTC6912 - Dual Programmable Gain Amplifiers with Serial Digital Interface

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

Description

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.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTC6912CDE-1#PBF 4x3 DFN-12 DE/UE C 05-08-1695 Yes
LTC6912CDE-1#TRPBF 4x3 DFN-12 DE/UE C 05-08-1695 Yes
LTC6912CDE-2#PBF 4x3 DFN-12 DE/UE C 05-08-1695 Yes
LTC6912CDE-2#TRPBF 4x3 DFN-12 DE/UE C 05-08-1695 Yes
LTC6912CGN-1#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC6912CGN-1#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC6912CGN-2#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC6912CGN-2#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC6912HGN-1#PBF SSOP-16 GN H 05-08-1641 (GN16) Yes
LTC6912HGN-1#TRPBF SSOP-16 GN H 05-08-1641 (GN16) Yes
LTC6912HGN-2#PBF SSOP-16 GN H 05-08-1641 (GN16) Yes
LTC6912HGN-2#TRPBF SSOP-16 GN H 05-08-1641 (GN16) Yes
LTC6912IDE-1#PBF 4x3 DFN-12 DE/UE I 05-08-1695 Yes
LTC6912IDE-1#TRPBF 4x3 DFN-12 DE/UE I 05-08-1695 Yes
LTC6912IDE-2#PBF 4x3 DFN-12 DE/UE I 05-08-1695 Yes
LTC6912IDE-2#TRPBF 4x3 DFN-12 DE/UE I 05-08-1695 Yes
LTC6912IGN-1#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC6912IGN-1#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC6912IGN-2#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC6912IGN-2#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes


LTC6912 Package Drawing
LTC6912 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTC6912CDE-1#PBF 4x3 DFN-12 C $3.29 $2.30 Yes
LTC6912CDE-1#TRPBF 4x3 DFN-12 C $2.36 Yes
LTC6912CDE-2#PBF 4x3 DFN-12 C $3.29 $2.30 Yes
LTC6912CDE-2#TRPBF 4x3 DFN-12 C $2.36 Yes
LTC6912CGN-1#PBF SSOP-16 C $3.07 $2.15 Yes
LTC6912CGN-1#TRPBF SSOP-16 C $2.21 Yes
LTC6912CGN-2#PBF SSOP-16 C $3.07 $2.15 Yes
LTC6912CGN-2#TRPBF SSOP-16 C $2.21 Yes
LTC6912HGN-1#PBF SSOP-16 H $3.79 $2.65 Yes
LTC6912HGN-1#TRPBF SSOP-16 H $2.71 Yes
LTC6912HGN-2#PBF SSOP-16 H $3.79 $2.65 Yes
LTC6912HGN-2#TRPBF SSOP-16 H $2.71 Yes
LTC6912IDE-1#PBF 4x3 DFN-12 I $3.86 $2.70 Yes
LTC6912IDE-1#TRPBF 4x3 DFN-12 I $2.76 Yes
LTC6912IDE-2#PBF 4x3 DFN-12 I $3.86 $2.70 Yes
LTC6912IDE-2#TRPBF 4x3 DFN-12 I $2.76 Yes
LTC6912IGN-1#PBF SSOP-16 I $3.64 $2.55 Yes
LTC6912IGN-1#TRPBF SSOP-16 I $2.61 Yes
LTC6912IGN-2#PBF SSOP-16 I $3.64 $2.55 Yes
LTC6912IGN-2#TRPBF SSOP-16 I $2.61 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC861A-A LTC6912 Dual Digitally Controlled PGA / Programmable Data Acquisition Measurement and Control System $75.00
DC861A-B LTC6912 Dual Digitally Controlled PGA / Programmable Data Acquisition Measurement and Control System $75.00
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Applications

  • Data Acquisition Systems
  • Dynamic Gain Changing
  • Automatic Ranging Circuits
  • Automatic Gain Control

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