Product details

Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 50 Gain (Min) (V/V) 1 Gain (Max) (V/V) 10000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 10 Features Overvoltage Protection CMRR (Min) (dB) 110 Input offset drift (+/-) (Max) (uV/C) 0.5 Input bias current (+/-) (Max) (nA) 5 Iq (Typ) (mA) 0.35 Bandwidth at min gain (Typ) (MHz) 0.8 Gain error (+/-) (Max) (%) 0.5 Operating temperature range (C) -40 to 85 Type Resistor Output swing headroom (to negative supply) (Typ) (V) 0.2 Output swing headroom (to positive supply) (Typ) (V) -0.8 Input common mode headroom (to negative supply) (Typ) (V) 0.95 Input common mode headroom (to positive supply) (Typ) (V) -0.65 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 0.28 Gain non-linearity (+/-) (Max) (%) 0.002
Number of channels (#) 1 Vs (Max) (V) 36 Vs (Min) (V) 2.7 Input offset (+/-) (Max) (uV) 50 Gain (Min) (V/V) 1 Gain (Max) (V/V) 10000 Noise at 1 kHz (Typ) (nV/rt (Hz)) 10 Features Overvoltage Protection CMRR (Min) (dB) 110 Input offset drift (+/-) (Max) (uV/C) 0.5 Input bias current (+/-) (Max) (nA) 5 Iq (Typ) (mA) 0.35 Bandwidth at min gain (Typ) (MHz) 0.8 Gain error (+/-) (Max) (%) 0.5 Operating temperature range (C) -40 to 85 Type Resistor Output swing headroom (to negative supply) (Typ) (V) 0.2 Output swing headroom (to positive supply) (Typ) (V) -0.8 Input common mode headroom (to negative supply) (Typ) (V) 0.95 Input common mode headroom (to positive supply) (Typ) (V) -0.65 Noise at 0.1 Hz-10 Hz (Typ) (uVpp) 0.28 Gain non-linearity (+/-) (Max) (%) 0.002
PDIP (P) 8 93 mm² 9.81 x 9.43 SOIC (D) 8 19 mm² 3.91 x 4.9
  • A newer version of this device is now available: INA818
  • Low offset voltage: 50 µV, maximum
  • Low drift: 0.5 µV/°C, maximum
  • Low input bias current: 5 nA, maximum
  • High CMR: 110 dB, minimum
  • Inputs protected to ±40 V
  • Wide supply range: ±1.35 to ±18 V
  • Low quiescent current: 350 µA
  • Packages: 8-Pin plastic DIP, SO-8
  • A newer version of this device is now available: INA818
  • Low offset voltage: 50 µV, maximum
  • Low drift: 0.5 µV/°C, maximum
  • Low input bias current: 5 nA, maximum
  • High CMR: 110 dB, minimum
  • Inputs protected to ±40 V
  • Wide supply range: ±1.35 to ±18 V
  • Low quiescent current: 350 µA
  • Packages: 8-Pin plastic DIP, SO-8

The INA118 is a low-power, general-purpose instrumentation amplifier offering excellent accuracy. The versatile, three op amp design and small size make this device an excellent choice for a wide range of applications. Current-feedback input circuitry provides wide bandwidth, even at high gain (70 kHz at G = 100).

A single external resistor sets any gain from 1 to 10000. Internal input protection can withstand up to ±40 V without damage.

The INA118 is laser-trimmed for low offset voltage (50 µV), drift (0.5 µV/°C), and high common-mode rejection (110 dB at G = 1000). The INA118 operates with power supplies as low as ±1.35 V, and quiescent current is only 350 µA, making this device an excellent choice for battery-operated systems.

The INA118 is available in 8-pin plastic DIP and SO-8 surface-mount packages, and specified for the –40°C to +85°C temperature range.

The upgraded INA818 offers a lower input stage offset voltage (35 µV, maximum), lower input bias current (0.5 nA maximum) and lower noise (8 nV/√Hz) at the same quiescent current. See the Device Comparison Table for a selection of precision instrumentation amplifiers from Texas Instruments.

The INA118 is a low-power, general-purpose instrumentation amplifier offering excellent accuracy. The versatile, three op amp design and small size make this device an excellent choice for a wide range of applications. Current-feedback input circuitry provides wide bandwidth, even at high gain (70 kHz at G = 100).

A single external resistor sets any gain from 1 to 10000. Internal input protection can withstand up to ±40 V without damage.

The INA118 is laser-trimmed for low offset voltage (50 µV), drift (0.5 µV/°C), and high common-mode rejection (110 dB at G = 1000). The INA118 operates with power supplies as low as ±1.35 V, and quiescent current is only 350 µA, making this device an excellent choice for battery-operated systems.

The INA118 is available in 8-pin plastic DIP and SO-8 surface-mount packages, and specified for the –40°C to +85°C temperature range.

The upgraded INA818 offers a lower input stage offset voltage (35 µV, maximum), lower input bias current (0.5 nA maximum) and lower noise (8 nV/√Hz) at the same quiescent current. See the Device Comparison Table for a selection of precision instrumentation amplifiers from Texas Instruments.

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INA818 ACTIVE Low power (350-µA), precision instrumentation amp with ±60-V overvoltage protection (gain pins 1, 8) Pin-to-pin device with higher GBW (2MHz), higher DC precision (35µV max Vos, 0.4 µV/C max drift), higher CMRR (140dB Min) and lower bias current (0.5nA max)

Technical documentation

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Type Title Date
* Data sheet INA118 Precision, Low-Power Instrumentation Amplifier datasheet (Rev. B) 29 Apr 2019
Application note Importance of Input Bias Current Return Paths in Instrumentation Amplifier Apps 27 Jul 2021
E-book An Engineer’s Guide to Designing with Precision Amplifiers 29 Apr 2021
Technical article What is an instrumentation amplifier? 09 Aug 2019
Application note Comprehensive Error Calculation for Instrumentation Amplifiers 26 Mar 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article How to layout a PCB for an instrumentation amplifier 14 Oct 2016
EVM User's guide Universal Instrumentation Amplifier EVM User’s Guide (Rev. B) 09 Aug 2016
Technical article Dealing with rejection: Instrumentation amplifier PSRR and CMRR (Part I) 25 Nov 2013
Analog Design Journal Getting the most out of your instrumentation amplifier design 10 Oct 2005

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

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Simulation tool

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Calculation tool

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Reference designs

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