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STMicroelectronics TSZ121ICT — Analog & Data Acquisition

STMicro TSZ121ICT Zero-Drift Op-Amp, 400 kHz, SC-70-5

MPNTSZ121ICT
End of Life

STMicroelectronics TSZ121ICT zero-drift operational amplifier, single circuit, 400 kHz gain bandwidth, 0.19 V/µs slew rate, 1 µV input offset, rail-to-rail output, SC-70-5 package, -40°C to 125°C.

$1.51Ref. price · indicative, final on quote
STMicroelectronics TSZ121ICT datasheet (PDF)
Packaging5-TSSOP, SC-70-5, SOT-353
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

TSZ121ICT specifications
ParameterValue
Output typeRail-to-Rail
MountingSurface Mount
Amplifier typeZero-Drift
Voltage - input offset1 µV
Voltage - supply span5.5 V
Current - supply31µA
Current - input bias70 pA
Current - output (Channel)18 mA
Operating temperature-40°C ~ 125°C
Gain bandwidth product400 kHz
PackageTape & Reel (TR); Cut Tape (CT)
Slew rate0.19V/µs
Case5-TSSOP, SC-70-5, SOT-353
Number of circuits1

Product details

Zero-drift precision in a 5-pin SC-70

The STMicroelectronics TSZ121ICT is a single-channel zero-drift operational amplifier with 1 µV input offset, 400 kHz gain-bandwidth product, and 0.19 V/µs slew rate. Supply current is 31 µA. Output drive is 18 mA per channel. Input bias current is 70 pA.

Temperature range and package — where it fits on the board

The SC-70-5 package (also known as SOT-353) is a five-lead, 2.0 mm × 2.1 mm footprint that fits on tight mixed-signal boards where every square millimetre counts. Surface-mount assembly is standard; no exposed pad, so the thermal path is through the leads only — keep the copper pour under the part connected to a ground plane for best heat spreading.

Frequently asked questions

Is TSZ121ICT rail-to-rail?

Yes, the output type is rail-to-rail. The input common-mode range is not rail-to-rail — it extends from the negative rail to about 1.1 V below the positive rail at 3.3 V supply, so high-side sensing at low supply voltages needs attention.

What is the closest functional equivalent to TSZ121ICT?

The OA4ZHA33Q is a quad-channel zero-drift amplifier with the same 400 kHz GBW, 0.19 V/µs slew rate, 1 µV offset, and 70 pA bias current, but in a different package and four circuits instead of one. For a single-channel drop-in, the TSV621ICT is a general-purpose (not zero-drift) alternative with 420 kHz GBW and 4 mV offset — the offset difference is significant for precision DC applications.