OPA2189IDGKR

Instrumentation, Op Amps, Buffer Amps Overview

The OPA2189IDGKR is a dual-channel, zero-drift, CMOS precision operational amplifier manufactured by Texas Instruments. It features a rail-to-rail output and operates within a supply voltage range of 4.5 V to 36 V. Key electrical parameters include a gain-bandwidth product of 14 MHz, a slew rate of 20 V/µs, and an input offset voltage of 800 nV. The device exhibits low noise with a density of 5.2 nV/√Hz at 1 kHz and maintains high common-mode rejection ratios up to 168 dB. It is housed in an 8-pin VSSOP package and supports an operating temperature range from -40°C to +125°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Zero-drift architecture ensures ultra-low offset voltage and minimal temperature drift for high DC accuracy.
• MUX-friendly input design prevents surge currents during large differential input voltages, enhancing stability in multiplexed systems.
• Rail-to-rail output capability allows signal swing close to both supply rails, maximizing dynamic range.
• Integrated controlled startup system manages power-on sequencing to prevent transient glitches.

Instrumentation, Op Amps, Buffer Amps Applications

• High-precision multi-channel data acquisition systems
• Strain gauge and bridge amplifier circuits
• Precision temperature measurement and RTD interfaces

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'DGKR' corresponds to the VSSOP-8 package and tape-and-reel shipping format. Confirm that the order quantity aligns with the manufacturer's standard reel size requirements. Ensure the application environment stays within the specified -40°C to +125°C thermal limits. Check for moisture sensitivity level (MSL) handling precautions if storage conditions exceed recommended thresholds prior to soldering.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when simultaneous high DC precision and fast AC response are required. The combination of zero-drift technology and 14 MHz bandwidth distinguishes it from slower chopper amplifiers or higher-noise general-purpose op-amps. It is suitable for applications demanding low input bias current and high common-mode rejection without sacrificing settling speed.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the OPAx189 family of CMOS precision operational amplifiers. It shares architectural similarities with single-channel variants like the OPA189 but provides two independent channels in a compact footprint. The family is designed to replace traditional bipolar precision amplifiers where lower power consumption and superior AC performance are critical.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

OPA2189ID: Identical electrical specifications and functionality; differs only in the SOIC-8 package instead of VSSOP-8. Verify pinout compatibility and thermal dissipation characteristics before substituting packages in existing layouts.