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INA118U +BOM

This low power instrumentation amp provides reliable and accurate signal amplification in a compact package

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INA118U General Description

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 ±2.25 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.

ina118u ina118u

Key Features

  • A newer version of this device is now available: INA818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: ±2.25 to ±18 V
  • Low quiescent current: 350 μA
  • Packages: 8-Pin plastic DIP, SO-8
ina118u ina118u

Application

  • Strain Gauge Measurement: It is used to amplify signals from strain gauges in applications like load cells and force sensors.
  • Bridge Amplification: In applications where Wheatstone bridge sensors, such as pressure and weight sensors, are used, the INA118U can accurately amplify the differential voltage output.
  • Medical Instrumentation: Used in medical devices like ECG (electrocardiogram) amplifiers to amplify small biopotential signals.
  • Data Acquisition Systems: In precision data acquisition systems where accurate signal conditioning is essential.
  • Industrial Automation: For amplifying signals in industrial automation and control systems.
  • Sensor Interfaces: In applications that involve interfacing with various sensors, including thermocouples and photodetectors.
  • Test and Measurement Equipment: In high-precision test and measurement instruments that require accurate signal amplification.
  • Audio and Instrumentation: In audio equipment and musical instruments for accurate amplification of low-level audio signals.
  • Signal Conditioning: In signal conditioning circuits for process control and industrial applications.
ina118u

Specifications

Category Integrated Circuits (ICs)LinearAmplifiersInstrumentation, OP Amps, Buffer Amps Series -
Amplifier Type Instrumentation Number of Circuits 1
Output Type - Slew Rate 0.9V/µs
-3db Bandwidth 800 kHz Current - Input Bias 1 nA
Voltage - Input Offset 25 µV Current - Supply 350µA
Current - Output / Channel 12 mA Voltage - Supply Span (Min) 2.7 V
Voltage - Supply Span (Max) 36 V Operating Temperature -40°C ~ 85°C
Mounting Type Surface Mount Base Product Number INA118

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Ratings and Reviews

More
T
T**r 07/24/2023

The sensor went for a short time. Put the battery, stuck in the pot after watering the plant, works.

17
M
M**y 01/12/2022

Goods Matches Description, quality Happy.This is Product Fits The Description, quality Content.

15
M
M**n 04/11/2021

Good goods, i advise!

7
Z
Z**r 01/05/2021

I'm very satisfied. All OK!

6

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