OPA1644AIPW

Instrumentation, Op Amps, Buffer Amps Overview

The OPA1644AIPW is a quad-channel audio operational amplifier from Texas Instruments' SoundPlus series, housed in a 14-pin TSSOP package. It features JFET inputs with a typical input bias current of 20 pA and a gain-bandwidth product of 11 MHz. The device supports dual or single power supplies ranging from ±2.25 V to ±18 V (or 4.5 V to 36 V). Key electrical specifications include a slew rate of 20 V/µs, total harmonic distortion plus noise of 0.00005%, and an output current capability of 36 mA per channel. It operates within a temperature range of -40°C to +85°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• JFET input architecture providing low input bias current for high impedance signal handling
• Rail-to-rail output capability maximizing dynamic range in audio applications
• Ultra-low total harmonic distortion plus noise ensuring high-fidelity signal reproduction
• Quad-channel configuration integrating four independent amplifiers in a compact surface-mount package

Instrumentation, Op Amps, Buffer Amps Applications

• High-performance multi-channel audio processing circuits
• Professional audio mixing consoles and preamplifiers
• Multi-zone audio distribution systems
• Precision analog signal conditioning for audio equipment

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific suffix IPW confirms the TSSOP-14 package and tube packaging format upon ordering. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure supply chain sources provide original manufacturer documentation to validate part authenticity and traceability.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component when multiple independent audio channels are required in a single footprint. The JFET input stage is suitable for high-impedance sources. Compare against the OPA1664 if higher bandwidth or lower offset voltage is needed, noting differences in input bias current and gain-bandwidth product specifications.

Instrumentation, Op Amps, Buffer Amps Part Context

This device belongs to the OPA164x family of high-performance audio op amps. It shares architectural similarities with the OPA1641 (single) and OPA1642 (dual) variants. The OPA1644 specifically integrates four identical amplifier channels, offering a space-efficient solution for stereo or surround sound applications requiring matched performance across all channels.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

• OPA1644AIDR: Same functional specifications but packaged in SOIC-14 tape and reel format.