LT1789 - Micropower, Single Supply Rail-to-Rail Output Instrumentation Amplifier

Features

  • Micropower: 95μA Supply Current Max
  • Low Input Offset Voltage: 100μV Max
  • Low Input Offset Voltage Drift: 0.5μV/°C Max
  • Single Gain Set Resistor:
    G = 1 to 1000 (LT1789-1)
    G = 10 to 1000 (LT1789-10)
  • Inputs Common Mode to V
  • Wide Supply Range: 2.2V to 36V Total Supply
  • CMRR at G = 10: 96dB Min
  • Gain Error: G = 10, 0.25% Max
  • Gain Nonlinearity: G = 10, 40ppm Max
  • Input Bias Current: 40nA Max
  • PSRR at G = 10: 100dB Min
  • 1kHz Voltage Noise: 48nV/√Hz
  • 0.1Hz to 10Hz Noise: 1.5μVP-P

Typical Application

LT1789 Typical Application

Description

The LT1789-1/LT1789-10 are micropower, precision instrumentation amplifiers that are optimized for single supply operation from 2.2V to 36V. The quiescent current is 95μA max, the inputs common mode to ground and the output swings within 110mV of ground. The gain is set with a single external resistor for a gain range of 1 to 1000 for the LT1789-1 and 10 to 1000 for the LT1789-10.

The high accuracy of the LT1789-1 (40ppm maximum nonlinearity and 0.25% max gain error) is unmatched by other micropower instrumentation amplifiers. The LT1789-10 maximizes both the input common mode range and dynamic output range when an amplification of 10 or greater is required, allowing precise signal processing where other instrumentation amplifiers fail to operate. The LT1789-1/LT1789-10 are laser trimmed for very low input offset voltage, low input offset voltage drift, high CMRR and high PSRR. The output can handle capacitive loads up to 400pF (LT1789-1), 1000pF (LT1789-10) in any gain configuration while the inputs are ESD protected up to 10kV (human body).

The LT1789-1/LT1789-10 are offered in the 8-pin SO package, requiring significantly less PC board area than discrete multi op amp and resistor designs.

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
LT1789CS8-1#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1789CS8-1#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1789CS8-10#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1789CS8-10#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1789IS8-1#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1789IS8-1#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1789IS8-10#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1789IS8-10#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes


LT1789 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
LT1789CS8-1#PBF SO-8 C $3.70 $3.20 Yes
LT1789CS8-1#TRPBF SO-8 C $3.26 Yes
LT1789CS8-10#PBF SO-8 C $4.55 $3.20 Yes
LT1789CS8-10#TRPBF SO-8 C $3.26 Yes
LT1789IS8-1#PBF SO-8 I $4.30 $3.70 Yes
LT1789IS8-1#TRPBF SO-8 I $3.76 Yes
LT1789IS8-10#PBF SO-8 I $5.27 $3.70 Yes
LT1789IS8-10#TRPBF SO-8 I $3.76 Yes
Buy NowRequest Samples
* 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
DC417B DIP8, MS8, S8, SOT23-6 | Multi-Footprint General Purpose Board for Single Op. Amp $25.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • Portable Instrumentation
  • Bridge Amplifiers
  • Strain Gauge Amplifiers
  • Thermocouple Amplifiers
  • Differential to Single-Ended Converters
  • Medical Instrumentation

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

Models for the following parts are available in LTspice:
LT1789-1
LT1789-10

Technical Support