LT1920 - Single Resistor Gain Programmable, Precision Instrumentation Amplifier


  • Single Gain Set Resistor: G = 1 to 10,000
  • Gain Error: G = 10, 0.3% Max
  • Gain Nonlinearity: G = 10, 30ppm Max
  • Input Offset Voltage: G = 10, 225µV Max
  • Input Offset Voltage Drift: 1µV/°C Max
  • Input Bias Current: 2nA Max
  • PSRR at G = 1: 80dB Min
  • CMRR at G = 1: 75dB Min
  • Supply Current: 1.3mA Max
  • Wide Supply Range: ±2.3V to ±18V
  • 1kHz Voltage Noise: 7.5nV/rtHz
  • 0.1Hz to 10Hz Noise: 0.28µVP-P
  • Available in 8-Pin PDIP and SO Packages
  • Meets IEC 1000-4-2 Level 4 ESD Tests with Two External 5k Resistors

Typical Application

LT1920 Typical Application
LT1920 Typical Application


The LT®1920 is a low power, precision instrumentation amplifier that requires only one external resistor to set gains of 1 to 10,000. The low voltage noise of 7.5nV/rtHz (at 1kHz) is not compromised by low power dissipation (0.9mA typical for ±2.3V to ±15V supplies). The high accuracy of 30ppm maximum nonlinearity and 0.3% max gain error (G = 10) is not degraded even for load resistors as low as 2k (previous monolithic instrumentation amps used 10k for their nonlinearity specifications). The LT1920 is laser trimmed for very low input offset voltage (125µV max), drift (1µV/°C), high CMRR (75dB, G = 1) and PSRR (80dB, G = 1). Low input bias currents of 2nA max are achieved with the use of superbeta processing. The output can handle capacitive loads up to 1000pF in any gain configuration while the inputs are ESD protected up to 13kV (human body). The LT1920 with two external 5k resistors passes the IEC 1000-4-2 level 4 specification. The LT1920, offered in 8-pin PDIP and SO packages, is a pin for pin and spec for spec improved replacement for the AD620. The LT1920 is the most cost effective solution for precision instrumentation amplifier applications. For even better guaranteed performance, see the LT1167.


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
LT1920CN8#PBF N-8 N C 05-08-1510 (N8) Yes
LT1920CS8#PBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1920CS8#TRPBF SO-8 S8 C 05-08-1610 (S8) Yes
LT1920IN8#PBF N-8 N I 05-08-1510 (N8) Yes
LT1920IS8#PBF SO-8 S8 I 05-08-1610 (S8) Yes
LT1920IS8#TRPBF SO-8 S8 I 05-08-1610 (S8) Yes

LT1920 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
LT1920CN8#PBF N-8 C $3.60 $3.05 Yes
LT1920CS8#PBF SO-8 C $3.60 $3.05 Yes
LT1920CS8#TRPBF SO-8 C $3.11 Yes
LT1920IN8#PBF N-8 I $3.80 $3.25 Yes
LT1920IS8#PBF SO-8 I $3.80 $3.25 Yes
LT1920IS8#TRPBF SO-8 I $3.31 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.

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