Parts Analog ICs Instrumentation Amplifiers INA333AIDGKR

TIINA333AIDGKR

Name: INA333AIDGKR
Brand: Texas Instruments

Texas Instruments

Instrumentation Amplifier 1 Circuit Rail-to-Rail 8-VSSOP

Active12,591 in stock

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Overview

The INA333AIDGKR is a high-precision, zero-drift instrumentation amplifier designed for low-power applications requiring accurate signal amplification of small differential voltages. It operates on a supply voltage as low as 1.8 V and consumes only 50 uA of quiescent current, making it ideal for battery-operated portable equipment. The device features an integrated RFI filter and a very low offset voltage of 10 uV to ensure signal integrity in electrically noisy environments.

Why Choose This Part

The INA333 offers exceptional DC precision with a near-zero drift architecture and a very low input bias current of 70 pA. Its rail-to-rail output and wide common-mode input range (down to 0.1 V above negative rail) maximize dynamic range in single-supply systems. Additionally, the 8-VSSOP package footprint and low 50 uA supply current enable high-density, power-efficient circuit designs.

Applications

Bridge Amplifiers

Directly interface with Wheatstone bridge sensors such as load cells, strain gauges, and pressure transducers in industrial weighing scales.

Medical Instrumentation

Used in portable ECG and EEG monitors where low power consumption and high common-mode rejection are critical for battery life and signal clarity.

RTD Temperature Sensing

Provides accurate amplification for RTD and thermistor circuits in precision thermal management systems.

Portable Data Acquisition

Enables high-resolution signal conditioning in handheld field instruments where PCB space and power budget are limited.

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

To evaluate the device, use the INA333EVM evaluation module which provides a pre-assembled platform for testing various gain configurations. Gain is set by a single external resistor connected across pins 1 and 8; ensure a low-temperature-coefficient resistor is used to maintain the 0.01 percent accuracy. Place a 0.1 uF ceramic bypass capacitor as close to the V+ pin as possible to minimize noise in high-impedance sensor applications.

INA333A Family

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

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

Also Consider

AD8237 Analog Devices - An alternative micropower instrumentation amplifier that offers an indirect current feedback architecture for true rail-to-rail input capability.

INA331 TITexas Instruments - Suitable if a higher bandwidth is required and the zero-drift precision of the INA333 is not strictly necessary for the application.