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INA333AIDGKT

TIINA333AIDGKT

Texas Instruments
Instrumentation Amplifier 1 Circuit Rail-to-Rail 8-VSSOP
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Overview

The INA333AIDGKT is a high-precision, low-power instrumentation amplifier designed for bridge amplification and small-signal conditioning. Utilizing a zero-drift architecture, it achieves exceptionally low offset voltage and near-zero drift over time and temperature. It is optimized for low-voltage operation from 1.8V to 5.5V, making it ideal for battery-powered handheld instrumentation.

Why Choose This Part

The INA333 offers superior DC precision with integrated RFI filtering to minimize interference in noisy environments. Its rail-to-rail output and ability to operate down to 1.8V supply rails provide maximum dynamic range for low-voltage analog-to-digital converters.

Applications

Bridge Amplifiers
Ideal for resistive bridge sensors such as weigh scales and pressure transducers where high sensitivity and stability are required.
Medical Instrumentation
Suitable for ECG and EEG signal conditioning due to its high CMRR and very low input bias current of 70 pA.
Portable Data Acquisition
The 50uA quiescent current allows for extended battery life in remote sensing and portable data logging applications.
RTD Sensor Interfacing
Provides the necessary precision for high-accuracy temperature measurements using RTDs or thermocouples.

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-TSSOP, 8-MSOP (0.118", 3.00mm Width)
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-VSSOP
Current - Output / Channel 40 mA
Voltage - Supply Span (Max) 5.5 V
Voltage - Supply Span (Min) 1.8 V

Getting Started

When designing with the INA333, ensure the gain-setting resistor (RG) is a high-precision, low-drift metal film type to maintain the amplifier's native performance. For rapid prototyping, use the INA333EVM evaluation module to test gain configurations and common-mode rejection performance.

INA333A Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number Package Stock
INA333AIDGKT (this part) TSSOP-8 —
INA333AIDGKR TSSOP-8 12,591
INA333AIDRGR WFDFN-8 379

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