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Texas Instruments OPA2631U/2K5 — Analog & Data Acquisition

OPA2631U/2K5 Voltage Feedback Op-Amp, 100V/µs Slew Rate

MPNOPA2631U/2K5
End of Life

Texas Instruments SpeedPlus™ OPA2631U/2K5, Dual Voltage Feedback Op-Amp, 75 MHz -3dB Bandwidth, 100V/µs Slew Rate, 2.7V–10.5V Supply, 8-SOIC Package, -40°C to 85°C.

$1.35Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
RoHSRoHS non-compliant
SeriesSpeedPlus™
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

OPA2631U/2K5 specifications
ParameterValue
SeriesSpeedPlus™
MountingSurface Mount
Amplifier typeVoltage Feedback
Voltage - input offset2.5 mV
Voltage - supply span10.5 V
Current - supply6mA (x2 Channels)
Current - input bias11 µA
Current - output (Channel)90 mA
Operating temperature-40°C ~ 85°C
-3db bandwidth75 MHz
Gain bandwidth product68 MHz
PackageBulk
Slew rate100V/µs
Case8-SOIC (0.154\", 3.90mm Width)
Number of circuits2

Product details

What this dual op-amp brings to a high-speed signal chain

It's the sort of part you reach for when a video line driver, pulse amplifier, or high-speed ADC buffer needs two channels in one package and the board area is tight. Each channel draws 6 mA supply current, so the total quiescent is 12 mA — moderate for this speed class, but worth budgeting in a multi-rail system.

The 100V/µs slew rate means this op-amp can swing a 5 V peak-to-peak output in 50 ns, which is fast enough to preserve the edges on a 10 MHz square wave or drive the input of a high-speed ADC without excessive slew-induced distortion. The 75 MHz -3dB bandwidth (gain-bandwidth product is 68 MHz) tells you the small-signal gain holds up well into the tens of megahertz. If you are conditioning signals from a fast photodiode or a magnetic pickup, this part keeps the phase shift manageable. The 90 mA output current per channel gives it enough drive to handle a 50 Ω back-terminated cable or a modest capacitive load without an external buffer.

RoHS flag — check your compliance path

If your BOM needs a lead-free assembly process, you will need to either qualify an exemption or look at a RoHS-compliant alternate.

Package and footprint — what fits on the board

No exposed pad, which simplifies layout but means the thermal path is through the leads — keep the ambient below 85°C for sustained high-output current. The shipping form is Bulk, not tape-and-reel, so plan for manual placement or a tube feeder if you are running a pick-and-place line.

Frequently asked questions

Is OPA2631U/2K5 RoHS compliant?

No — it is listed as RoHS non-compliant. If your design requires RoHS compliance, you will need to either secure an exemption or evaluate a RoHS-compliant alternate.

What is a direct equivalent or replacement for OPA2631U/2K5?

The THS4215DRBT is a single-channel voltage-feedback op-amp with a 350 MHz bandwidth and 970 V/µs slew rate, but it is a single-channel part in a different package (QFN). For a dual-channel replacement in the same 8-SOIC footprint, the closest functional match would be another dual voltage-feedback op-amp from TI's SpeedPlus family with similar slew rate and bandwidth — verify the pinout and supply range against your design.