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).

Datasheet PDF