LTC6915 - Zero Drift, Precision Instrumentation Amplifier with Digitally Programmable Gain

Features

  • 14 Levels of Programmable Gain
  • 125dB CMRR Independent of Gain
  • Gain Accuracy 0.1% (Typ)
  • Maximum Offset Voltage of 10µV
  • Maximum Offset Voltage Drift: 50nV/°C
  • Rail-to-Rail Input and Output
  • Parallel or Serial (SPI) Interface for Gain Setting
  • Supply Operation: 2.7V to ±5.5V
  • Typical Noise: 2.5µVP-P (0.01Hz to 10Hz)
  • 16-Lead SSOP and 12-Lead DFN Packages

Typical Application

LTC6915 Typical Application

Description

The LTC6915 is a precision programmable gain instrumentation amplifier. The gain can be programmed to 0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, or 4096 through a parallel or serial interface. The CMRR is typically 125dB with a single 5V supply with any programmed gain. The offset is below 10µV with a temperature drift of less than 50nV/°C.

The LTC6915 uses charge balanced sampled data techniques to convert a differential input voltage into a single ended signal that is in turn amplified by a zero-drift operational amplifier.

The differential inputs operate from rail-to-rail and the single-ended output swings from rail-to-rail. The LTC6915 can be used in single power supply applications as low as 2.7V, or with dual ±5V supplies. The LTC6915 is available in a 16-lead SSOP package and a 12-lead DFN surface mount package.

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
LTC6915CDE#PBF 4x3 DFN-12 DE/UE C 05-08-1695 Yes
LTC6915CDE#TRPBF 4x3 DFN-12 DE/UE C 05-08-1695 Yes
LTC6915CGN#PBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC6915CGN#TRPBF SSOP-16 GN C 05-08-1641 (GN16) Yes
LTC6915HGN#PBF SSOP-16 GN H 05-08-1641 (GN16) Yes
LTC6915HGN#TRPBF SSOP-16 GN H 05-08-1641 (GN16) Yes
LTC6915IDE#PBF 4x3 DFN-12 DE/UE I 05-08-1695 Yes
LTC6915IDE#TRPBF 4x3 DFN-12 DE/UE I 05-08-1695 Yes
LTC6915IGN#PBF SSOP-16 GN I 05-08-1641 (GN16) Yes
LTC6915IGN#TRPBF SSOP-16 GN I 05-08-1641 (GN16) Yes


LTC6915 Package Drawing
LTC6915 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
LTC6915CDE#PBF 4x3 DFN-12 C $3.69 $2.44 Yes
LTC6915CDE#TRPBF 4x3 DFN-12 C $2.50 Yes
LTC6915CGN#PBF SSOP-16 C $3.69 $2.44 Yes
LTC6915CGN#TRPBF SSOP-16 C $2.50 Yes
LTC6915HGN#PBF SSOP-16 H $4.37 $2.89 Yes
LTC6915HGN#TRPBF SSOP-16 H $2.95 Yes
LTC6915IDE#PBF 4x3 DFN-12 I $4.07 $2.69 Yes
LTC6915IDE#TRPBF 4x3 DFN-12 I $2.75 Yes
LTC6915IGN#PBF SSOP-16 I $4.07 $2.69 Yes
LTC6915IGN#TRPBF SSOP-16 I $2.75 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.

Click here to view our complete list of demo boards

Applications

  • Thermocouple Amplifiers
  • Electronic Scales
  • Medical Instrumentation
  • Strain Gauge Amplifier
  • High Resolution Data Acquisition

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Design Tools

Linear Technology provides a variety of custom design simulation tools and device models to allow even novice designers to quickly and easily evaluate circuits using high performance switching regulators, amplifiers, data converters, filters and more. Please visit our Design Tools page to view and download:

  • LTspice - A powerful SPICE simulator, schematic capture and waveform viewer with enhancements and models for easing the simulation of switching regulators
  • LTpowerCAD - A complete power supply selection, synthesis and design tool
  • LTpowerPlay - A development environment supporting Linear Technology's Digital Power System Management (PSM) products
  • PScope & QuikEval - USB-based product demonstration and data acquisition system for use with our ADCs, DACs, and more
  • Linduino - Arduino compatible system for developing and distributing firmware libraries and example code
  • LinearLab Tools - A collection of Matlab and Python programs that provide direct access to Linear Technology’s data converter evaluation boards
  • And More!

Technical Support