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Texas Instruments OPA743NA/250 — Analog & Data Acquisition

OPA743NA/250 General Purpose Op-Amp, 7 MHz

MPNOPA743NA/250
End of Life

Texas Instruments OPA743NA/250, general-purpose op-amp, 1 circuit, 7 MHz gain bandwidth, 10 V/µs slew rate, rail-to-rail output, 3.5 V to 12 V supply, SOT-23-5 package, -40°C to 85°C.

$3.46Ref. price · indicative, final on quote
PackagingSC-74A, SOT-753
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

OPA743NA/250 specifications
ParameterValue
Output typeRail-to-Rail
MountingSurface Mount
Amplifier typeGeneral Purpose
Voltage - input offset1.5 mV
Voltage - supply span3.5 V
Current - supply1.1mA
Current - input bias1 pA
Current - output (Channel)20 mA
Operating temperature-40°C ~ 85°C
Gain bandwidth product7 MHz
PackageTape & Reel (TR); Cut Tape (CT)
Slew rate10V/µs
CaseSC-74A, SOT-753
Number of circuits1

Product details

It draws 1.1 mA supply current and operates from a single 3.5 V to 12 V supply or split ±5 V rails. The 1 pA input bias current suits it for high-impedance sensor interfaces — photodiode amplifiers, pH probe buffers, or piezoelectric pickups — where bias-current-induced offset would otherwise dominate the error budget.

Slew rate and output swing — what the 10 V/µs buys you

For a 5 V peak-to-peak sine wave, that supports full-power bandwidth around 318 kHz before slew-rate limiting distorts the waveform.

Package and footprint — SOT-23-5

The OPA743NA/250 comes in a 5-pin SOT-23 package (SC-74A / SOT-753 case code). Surface-mount only, with a 0.95 mm pin pitch.

Frequently asked questions

What is the equivalent or replacement for OPA743NA/250?

No official second-source alternate is listed. Among general-purpose op-amps in SOT-23-5, the TLV9351IDCKR offers a higher slew rate (20 V/µs) and wider supply range (4.5 V to 36 V) but a lower 3.5 MHz GBW — a trade-off worth evaluating if your design needs faster edge rates or higher supply voltage.

What is OPA743NA/250's listed slew rate?

The slew rate is 10 V/µs, which supports full-power bandwidth around 318 kHz for a 5 V peak-to-peak sine wave before slew limiting occurs.