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Texas Instruments OPA1644AIPW — Analog & Data Acquisition

OPA1644AIPW SoundPlus™ Audio Op-Amp, 11 MHz, 20 V/µs, Quad

MPNOPA1644AIPW
End of Life

Texas Instruments OPA1644AIPW, SoundPlus™ series, quad audio operational amplifier, 11 MHz gain bandwidth, 20 V/µs slew rate, rail-to-rail output, 4.5 V to 36 V supply, 14-TSSOP package, -40°C to 85°C operating temperature.

$6.37Ref. price · indicative, final on quote
Texas Instruments OPA1644AIPW datasheet (PDF)
Packaging14-TSSOP (0.173", 4.40mm Width)
RoHSROHS3 Compliant
SeriesSoundPlus™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

OPA1644AIPW specifications
ParameterValue
SeriesSoundPlus™
Output typeRail-to-Rail
MountingSurface Mount
Amplifier typeAudio
Voltage - input offset1 mV
Voltage - supply span4.5 V
Current - supply1.8mA (x4 Channels)
Current - input bias2 pA
Current - output (Channel)36 mA
Operating temperature-40°C ~ 85°C
Gain bandwidth product11 MHz
PackageTube
Slew rate20V/µs
Case14-TSSOP (0.173\", 4.40mm Width)
Number of circuits4

Product details

The Texas Instruments OPA1644AIPW is a quad-channel audio operational amplifier from the SoundPlus™ series. It delivers an 11 MHz gain-bandwidth product and a 20 V/µs slew rate.

Key ratings and what they mean for a field swap or BOM line

The 20 V/µs slew rate and 11 MHz GBW suit audio-band signals. The quad draws 1.8 mA per channel.

That means a field-service tech needs a fine-tip iron or hot-air station, and a steady hand — this is not a socketed DIP you can swap in a parking lot.

There is no NRND or EOL notice, so it is safe to qualify into a new BOM or specify as a spare.

Frequently asked questions

Does the OPA1644AIPW have rail-to-rail output?

Yes, the output type is rail-to-rail, which gives maximum signal swing on low-voltage supplies.

Is the OPA1644AIPW suitable for an audio preamp?

Yes, it is an audio amplifier type from the SoundPlus™ series, with 11 MHz GBW, 20 V/µs slew rate, and 2 pA input bias current — well suited for line-level preamp stages, active filters, and ADC buffers.

What are alternatives to the OPA1644AIPW?

A functional alternative in the same 14-TSSOP quad footprint is the OPA4374AIPWT, which offers 6.5 MHz GBW and 5 V/µs slew rate with a CMOS rail-to-rail output and a wider temperature range (-40°C to 125°C). It is a lower-bandwidth part, so it fits less demanding audio or general-purpose signal chains.