OPA333
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TI zero-drift precision op-amp, SOT-23-5. 10 uV offset, 0.05 uV/C drift, rail-to-rail, 1.8-5.5 V. Datasheet-verified.
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markdownOPA333
Texas Instruments · Zero-drift precision op-amp · SOT-23-5
A single zero-drift (chopper-stabilized) precision operational amplifier in SOT-23-5, for measuring very small DC signals accurately. Its input offset voltage is just 10 uV maximum and drifts only 0.05 uV per degree C, with essentially no 1/f (flicker) noise, so it recovers microvolt-level signals from bridge sensors, thermocouples, shunt-current measurements, and electrochemical cells where a general-purpose op-amp's offset would swamp the signal. The output is rail-to-rail and it runs from a single 1.8 to 5.5 V supply, making it easy to drop into low-voltage precision front ends. Pinout is OUT, V-, +IN, -IN, V+.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | OUT | output | Op-amp output. Rail-to-rail output that swings within 50 mV of the supply rails. Short-circuit protected to ground (one amplifier per package). |
| 2 | V- | power_in | Negative (lowest) power supply. Connect to GND for single-supply operation or to the negative rail for dual-supply operation. Total supply (V+ minus V-) must be between 1.8 V and 5.5 V. |
| 3 | +IN | input | Noninverting input. Common-mode range extends 100 mV beyond both supply rails. Diode-clamped to the supply rails; limit input current to 10 mA when signals exceed rails by more than 0.3 V. |
| 4 | -IN | input | Inverting input. Common-mode range extends 100 mV beyond both supply rails. Diode-clamped to the supply rails; limit input current to 10 mA when signals exceed rails by more than 0.3 V. |
| 5 | V+ | power_in | Positive (highest) power supply. Operating supply range 1.8 V to 5.5 V referenced to V-. Bypass with a 0.1 µF ceramic capacitor to V-/GND close to the pin. |
Key specifications
| Parameter | Value |
|---|---|
| Type | Zero-drift precision op-amp |
| Offset voltage | 10 µV max |
| Offset drift | 0.05 µV/°C |
| Noise | 1.1 µVpp (0.1-10 Hz), no 1/f |
| Output | rail-to-rail |
| Gain-bandwidth | 350 kHz |
| Supply voltage | 1.8-5.5 V |
| Package | SOT-23-5 |
Ordering variants
Same part, different packaging or reel option.
OPA333AIDBVR (SOT-23-5)OPA333AIDBVT (SOT-23-5, small reel)
CAD (KiCad official)
- Symbol:
Amplifier_Operational:OPA333xxDBV - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (49 pp, sha256
df60da7154848c57, retrieved 2026-08-17, tier: manufacturer) - Extractor:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).