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Texas Instruments LM7121IMX/NOPB — Logic ICs

Texas Instruments LM7121IMX/NOPB Voltage Feedback Op-Amp

MPNLM7121IMX/NOPB
End of Life

Texas Instruments LM7121IMX/NOPB voltage feedback op-amp, single circuit, 1300 V/µs slew rate, 235 MHz -3dB bandwidth, 5.3 mA supply, 4.5 V to 33 V supply span, 8-SOIC package, -40°C to 85°C operating temperature.

$3.93Ref. price · indicative, final on quote
Packaging8-SOIC (0.154", 3.90mm Width)
StockContact for availability
MOQ1 pcs
  • 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
  • Date & lot codes on quoteStated per line before you commit; label photos on request.
  • MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
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Specifications

LM7121IMX/NOPB Technical Specifications
ParameterValue
Mounting typeSurface Mount
Amplifier typeVoltage Feedback
Voltage - input offset900 µV
Voltage - supply span4.5 V
Current - supply5.3mA
Current - input bias5.2 µA
Operating temperature-40°C ~ 85°C
-3db bandwidth235 MHz
Gain bandwidth product175 MHz
PackageTape & Reel (TR); Cut Tape (CT)
Slew rate1300V/µs
Case8-SOIC (0.154\", 3.90mm Width)
Number of circuits1

Product details

That slew rate means it can swing a 5 V output step in under 4 ns, which is what you need when driving a high-speed ADC input or a video line driver. The 5.3 mA supply current is the trade-off: you get the speed without the 10+ mA draw of a full current-feedback part, but the voltage-feedback topology means you still need to watch the feedback resistor value for stability at high closed-loop gains.

The supply span runs from 4.5 V to 33 V, so it works on a single 5 V or 12 V rail, or split supplies like ±5 V. No AEC-Q100 grade here, so it is not qualified for under-hood automotive, but the industrial temperature band is enough for most chassis-mounted or indoor gear.

Package and footprint

Surface-mount only — no through-hole variant available.

Lifecycle and compliance

ROHS3 compliant, no exemptions to chase. For a new design, this part is a low-risk choice from a lifecycle standpoint — no last-time-buy clock ticking.

Frequently asked questions

What is the slew rate of LM7121IMX/NOPB?

The slew rate is 1300 V/µs, which is the headline rating for this part. It determines how fast the output can swing — critical for driving high-speed ADCs or video lines.

What is the equivalent or replacement for LM7121IMX/NOPB?

The THS4215DRBT is a voltage-feedback op-amp in the same 8-SOIC footprint, with a 970 V/µs slew rate and 350 MHz bandwidth. It is a functional alternative if you need slightly more bandwidth and can accept a lower slew rate. The OPA859QDSGRQ1 is a JFET-input part with 900 MHz bandwidth and 1150 V/µs slew rate, but it is AEC-Q100 qualified and comes in a different package (8-WSON). Neither is a direct pin-for-pin replacement — verify the feedback network and supply rails against your design.