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INA128UA/2K5

TIINA128UA/2K5

Texas Instruments
Instrumentation Amplifier 1 Circuit 8-SOIC
Active8,393 in stock
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Overview

The INA128UA/2K5 is a high-accuracy, low-power instrumentation amplifier designed for precise signal conditioning in data acquisition and sensor applications. It features a classic three-op-amp architecture that allows for gain settings from 1 to 10,000 using a single external resistor. With a wide supply range of +/-2.25V to +/-18V and an input offset voltage of only 25 uV, it provides exceptional DC performance in industrial environments.

Why Choose This Part

This amplifier offers a 1.3 MHz bandwidth and a 4V/us slew rate, making it faster than many precision competitors while maintaining a low 700uA supply current. Its internal input protection can withstand up to +/-40V without damage, ensuring reliability in industrial field wiring applications.

Applications

Industrial Pressure Transmitters
Amplifying small differential signals from bridge-based pressure sensors in harsh electrical environments.
Medical ECG Monitoring
Capturing microvolt-level biopotential signals while rejecting high common-mode noise from the human body.
Precision Weigh Scales
Utilizing the low 2 nA input bias current and high CMR to resolve tiny weight changes in load cell applications.
Analog Input Modules
Serving as a robust front-end for PLC and DAQ systems requiring protection and high input impedance.

Key Specifications

Slew Rate 4V/us
Mounting Type Surface Mount
-3db Bandwidth 1.3 MHz
Amplifier Type Instrumentation
Package / Case 8-SOIC (0.154", 3.90mm Width)
Current - Supply 700uA
Number of Circuits 1
Current - Input Bias 2 nA
Operating Temperature -40degC ~ 125degC
Voltage - Input Offset 25 uV
Supplier Device Package 8-SOIC
Current - Output / Channel 15 mA
Voltage - Supply Span (Max) 36 V
Voltage - Supply Span (Min) 4.5 V

Getting Started

To use the INA128UA/2K5, connect a single resistor (Rg) between pins 1 and 8 to set the desired gain according to the formula G = 1 + (50k/Rg). Ensure the reference pin (pin 5) is connected to a low-impedance node, such as ground or a voltage reference, to maintain high common-mode rejection. For prototyping, use an SOIC-8 to DIP adapter or an evaluation module like the INA128EVM.

Also Consider

AD620ARZ Analog Devices - Industry-standard alternative with similar gain-set architecture and low power consumption.

Categories

Analog ICs > Instrumentation Amplifiers Wearables & Medical > Biometric Sensors