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Texas Instruments OPA391DCKT — DC-DC Power Modules

OPA391DCKT e-trim™ Op-Amp, 1 MHz GBW, 15 µV Offset, SC-70-5

MPNOPA391DCKT
End of Life

Texas Instruments e-trim™ series OPA391DCKT, General Purpose Amplifier, 1 Circuit, Rail-to-Rail, 1V/µs slew rate, 1 MHz gain bandwidth, 5.5V supply max, SC-70-5 package, -40°C to 125°C.

$2.75Ref. price · indicative, final on quote
Texas Instruments OPA391DCKT datasheet (PDF)
Packaging5-TSSOP, SC-70-5, SOT-353
RoHSNot applicable
Seriese-trim™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

OPA391DCKT specifications
ParameterValue
Seriese-trim™
Output typeRail-to-Rail
MountingSurface Mount
Amplifier typeGeneral Purpose
Voltage - input offset15 µV
Voltage - supply span5.5 V
Current - supply24µA
Current - input bias0.01 pA
Current - output (Channel)60 mA
Operating temperature-40°C ~ 125°C (TA)
Gain bandwidth product1 MHz
PackageTape & Reel (TR); Cut Tape (CT)
Slew rate1V/µs
Case5-TSSOP, SC-70-5, SOT-353
Number of circuits1

Product details

The OPA391DCKT is a single-channel, rail-to-rail output op-amp from TI's e-trim™ series. Its 15 µV maximum input offset voltage and 0.01 pA input bias current suit microvolt-level sensor outputs. The 1 MHz gain-bandwidth product and 1 V/µs slew rate keep supply draw at 24 µA.

Surface-mount SC-70-5 package (SOT-353 footprint).

Listed as Active by TI. For a BOM line, that means standard distribution availability and no forced redesign cycle. The e-trim™ series is TI's internal trimming technology that achieves the low offset without external nulling — it's a production feature, not a separate product family, so the part is a mainstream catalog item.

Output drive and rail headroom

Can source or sink 60 mA per channel, generous for a 24 µA quiescent part. Rail-to-rail output reaches within millivolts of the supply rails.

Frequently asked questions

What is the equivalent for OPA391DCKT?

The TLV9351IDCKR is a close functional peer in the same SC-70-5 footprint: it offers 3.5 MHz GBW and 20 V/µs slew rate but draws 600 µA supply current and has a 350 µV typical offset — so it trades higher bandwidth for higher power and worse offset. The OPA391 stays the choice for precision low-power designs; the TLV9351 fits where speed matters more than quiescent current.

What is the bandwidth of OPA391DCKT?

Gain-bandwidth product is 1 MHz, with a 1 V/µs slew rate. That combination supports gains up to about 10 at 100 kHz before the open-loop gain rolls off — adequate for audio-frequency filtering, sensor amplification, and control loops, but not for video or high-speed ADC drivers.

What package is OPA391DCKT?

The DCKT suffix indicates a 5-pin SC-70-5 (SOT-353) surface-mount package. It is also listed as compatible with 5-TSSOP and SC-70-5 footprints — the SC-70-5 is the actual body. Tape & Reel and Cut Tape options are available for prototyping or production.