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INA333AIDRGT

TIINA333AIDRGT

Texas Instruments
Instrumentation Amplifier 1 Circuit Rail-to-Rail 8-SON (3x3)
NRND9,323 in stock

Overview

The INA333AIDRGT is a low-power, precision instrumentation amplifier designed for high-accuracy signal conditioning in portable and battery-operated devices. It features a zero-drift architecture that provides excellent DC stability with very low offset voltage and drift over time and temperature. Operating on as little as 50uA of supply current, it is ideal for systems requiring high input impedance and precise amplification of small differential signals.

Why Choose This Part

This device offers an exceptionally low power-to-performance ratio with a quiescent current of only 50uA and a wide operating voltage range down to 1.8V. Its zero-drift technology ensures high precision by minimizing offset voltage and noise, while integrated RFI filters protect sensitive signal paths from electromagnetic interference.

Applications

Bridge Amplifiers
Interfacing with resistive bridge sensors such as strain gauges and pressure transducers in industrial weighing scales.
Medical Instrumentation
Precise amplification of biopotential signals in handheld ECG or EMG monitoring equipment where low power consumption is critical.
Portable Data Acquisition
High-accuracy signal conditioning for remote sensor nodes and battery-powered field measurement tools.

Key Specifications

Slew Rate 0.16V/us
Output Type Rail-to-Rail
Mounting Type Surface Mount
-3db Bandwidth 150 kHz
Amplifier Type Instrumentation
Package / Case 8-WFDFN Exposed Pad
Current - Supply 50uA
Number of Circuits 1
Current - Input Bias 70 pA
Operating Temperature -40degC ~ 125degC
Voltage - Input Offset 10 uV
Supplier Device Package 8-SON (3x3)
Current - Output / Channel 40 mA
Voltage - Supply Span (Max) 5.5 V
Voltage - Supply Span (Min) 1.8 V

Getting Started

To evaluate the INA333AIDRGT, utilize the INA333EVM evaluation module which provides a pre-populated board for rapid prototyping. Gain is set by a single external resistor, allowing designers to easily tune the amplifier for specific sensor outputs. Ensure the decoupling capacitors are placed close to the 8-SON package pins to maintain stability in low-noise applications.

INA333A Family

Part NumberDifferenceStock
INA333AIDGKR GKR 6,301
Also available as: INA333AIDRGR

Also Consider

AD8421 Analog Devices - Provides significantly higher bandwidth and lower noise for applications where power consumption is less restrictive than signal speed.
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