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INA333AIDRGR

TIINA333AIDRGR

Texas Instruments
Instrumentation Amplifier 1 Circuit Rail-to-Rail 8-SON (3x3)
Active379 in stock
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Overview

The INA333AIDRGR is a high-precision, zero-drift instrumentation amplifier designed for low-power applications requiring exceptional DC performance. It features a rail-to-rail output and can operate on supply voltages as low as 1.8V while drawing only 50uA of quiescent current. Its integrated RFI filtering and low offset voltage of 10uV make it ideal for bridge-based sensor signal conditioning.

Why Choose This Part

The zero-drift architecture provides long-term stability and extremely low offset voltage of 10uV, eliminating the need for periodic calibration. It operates efficiently in battery-powered systems with a 50uA supply current and maintains signal integrity in noisy environments thanks to its internal RFI filtering.

Applications

Precision Bridge Amplifiers
Ideal for load cells, strain gauges, and pressure sensors where high accuracy and low drift are required.
Medical Instrumentation
Commonly used in portable ECG and EEG monitors due to its low power consumption and high CMRR.
RTD Sensor Interfacing
Used in temperature measurement systems to amplify small differential voltages from resistance temperature detectors.
Handheld Test Equipment
Suitable for battery-powered diagnostic tools needing high precision in a small 3x3mm WSON package.

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 circuit, use the INA333EVM evaluation module which provides a hardware platform for testing various gain configurations. Gain is set by a single external resistor connected between the RG pins according to the formula G = 1 + (100k / Rg). Ensure the power supply is decoupled with 0.1uF capacitors placed close to the device pins for optimal performance.

INA333A Family

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

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

Also Consider

INA826 TITexas Instruments - Provides a wider supply range up to 36V and a lower price point for industrial systems that do not require zero-drift performance.

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Categories

Analog ICs > Instrumentation Amplifiers