OPA2189IDR

Instrumentation, Op Amps, Buffer Amps Overview

The OPA2189IDR is a dual-channel precision operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface-mount package. It features a zero-drift architecture with a gain-bandwidth product of 14 MHz and a slew rate of 20 V/µs. The device operates on supply voltages ranging from 4.5 V to 36 V, drawing a typical supply current of 1.3 mA per channel. Key electrical specifications include a maximum input offset voltage of 1.5 µV, an input bias current of 70 pA, and a rail-to-rail output capability. It provides high common-mode rejection ratios and supports operation across temperatures 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 stage allows signal swing close to both supply rails, maximizing dynamic range.
• Integrated EMI filtering inputs improve robustness against radio frequency and electromagnetic interference.

Instrumentation, Op Amps, Buffer Amps Applications

• High-precision multi-channel data acquisition systems
• Strain gauge and bridge amplifier circuits
• Temperature measurement and RTD signal conditioning
• Active filtering applications requiring low noise

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix 'IDR' corresponds to the SOIC-8 tape-and-reel packaging configuration. Confirm that the required operating temperature range extends to +125°C and that the supply voltage limits align with system requirements. Ensure compatibility with the 8-pin small-outline integrated circuit footprint during PCB layout.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when application demands combine low noise with high DC precision and fast settling times. The MUX-friendly feature makes it suitable for scanning multiple sensor inputs without cross-talk or transient errors. Compare against single-channel variants if only one amplifier is needed, or consider alternative packages like VSSOP if board space constraints require a smaller footprint.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the OPA2189 family of CMOS precision operational amplifiers. It shares core architectural features with other members such as the OPA2188 and OPA1189, including zero-drift technology and rail-to-rail outputs. The 'IDR' designation specifically identifies the dual-channel version in the SOIC-8 reel packaging format.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

Publicly documented substitutes include the TPA1882-SR from 3PEAK. Verify pinout compatibility and electrical parameter alignment before substitution.