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INA118U

TIINA118U

Texas Instruments
Instrumentation Amplifier 1 Circuit 8-SOIC
NRND2,621 in stock

Overview

The INA118U is a low-power, general-purpose instrumentation amplifier designed for high accuracy and excellent common-mode rejection. It operates with a very low quiescent current of 350uA and features internal input protection up to plus or minus 40V. This device is particularly effective in precision applications requiring a wide power supply range from 2.25V to 18V.

Why Choose This Part

The INA118U offers exceptional robustness with integrated JFET input protection up to 40V beyond the supply rails. It features a low input offset voltage of 25uV and maintains a functional 800 kHz bandwidth, providing a versatile balance of speed and precision in an 8-SOIC package.

Applications

Industrial Process Control
Used in bridge amplifiers and thermocouple amplifiers where high precision and low noise are critical for signal integrity.
Battery-Powered Instrumentation
The low 350uA supply current makes it ideal for portable field equipment and remote sensor nodes.
Medical Signal Acquisition
Suitable for physiological signal monitoring due to its high input impedance and low 1nA input bias current.
Data Acquisition Systems
Provides a high-performance analog front end for ADCs in multi-channel measurement systems.

Key Specifications

Slew Rate 0.9V/us
Mounting Type Surface Mount
-3db Bandwidth 800 kHz
Amplifier Type Instrumentation
Package / Case 8-SOIC (0.154", 3.90mm Width)
Current - Supply 350uA
Number of Circuits 1
Current - Input Bias 1 nA
Operating Temperature -40degC ~ 85degC
Voltage - Input Offset 25 uV
Supplier Device Package 8-SOIC
Current - Output / Channel 12 mA
Voltage - Supply Span (Max) 36 V
Voltage - Supply Span (Min) 2.7 V

Getting Started

To use the INA118U, set the desired gain using a single external resistor between pins 1 and 8. Ensure proper power supply decoupling with 0.1uF ceramic capacitors placed close to the V+ and V- pins. For evaluation, use a generic SOIC-8 to DIP breakout board to prototype on a breadboard.

Also Consider

INA128UA TITexas Instruments - Offers similar pinout and functionality but is optimized for higher precision applications with different noise characteristics.