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INA126U/2K5

TIINA126U/2K5

Texas Instruments
Instrumentation Amplifier 1 Circuit 8-SOIC
NRND2,216 in stock
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Overview

The INA126U/2K5 is a low-power, two-op-amp instrumentation amplifier designed for precise signal acquisition in bridge-based sensor systems. It operates on a wide supply range from 1.35V to 18V per rail while consuming only 175uA of quiescent current. This part is optimized for high-density applications where multiple channels or battery-powered operation are required.

Why Choose This Part

The device features a flexible gain range set by a single external resistor, providing high accuracy with a 0.02 percent gain error. Its wide supply voltage range and low input bias current of 10nA allow for interfacing with high-impedance sources without significant loading effects. The 8-SOIC package provides a compact footprint for multi-channel industrial analog input modules.

Applications

Industrial Process Control
Ideal for level and flow transmitters where accurate differential signal amplification is needed in noisy environments.
Medical Instrumentation
Used in patient monitors and electrocardiogram (ECG) systems to amplify small physiological signals.
Battery-Powered Transducers
The low 175uA supply current makes it suitable for remote wireless sensors and portable measurement tools.
Bridge Amplifiers
Commonly used for strain gauges and RTD temperature sensors due to its 100uV low offset voltage.

Key Specifications

Slew Rate 0.4V/us
Mounting Type Surface Mount
-3db Bandwidth 200 kHz
Amplifier Type Instrumentation
Package / Case 8-SOIC (0.154", 3.90mm Width)
Current - Supply 175uA
Number of Circuits 1
Current - Input Bias 10 nA
Operating Temperature -40degC ~ 85degC
Voltage - Input Offset 100 uV
Supplier Device Package 8-SOIC
Current - Output / Channel 10 mA
Voltage - Supply Span (Max) 36 V
Voltage - Supply Span (Min) 2.7 V

Getting Started

To implement the INA126U, calculate the gain-setting resistor (Rg) according to the datasheet formula and place it as close as possible to pins 1 and 8. Ensure proper decoupling with 0.1uF ceramic capacitors near the supply pins, especially in single-supply configurations. Evaluation can be performed using generic SOIC-8 breakout boards or custom PCBs following TI recommended layout practices for analog signal integrity.

Also Consider

INA128UA TITexas Instruments - Provides a three-op-amp architecture with higher performance and wider bandwidth for applications requiring better common-mode rejection.