OPA350UA from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	NC	unconnected	No internal connection. Leave floating or tie to a static potential.
2	-In	input	Inverting input of the operational amplifier. Common-mode range extends 0.1V beyond each rail (-0.1V to V+ +0.1V). Input bias current typ. +/-0.5pA.
3	+In	input	Non-inverting input of the operational amplifier. Common-mode range extends 0.1V beyond each rail (-0.1V to V+ +0.1V).
4	V-	power_in	Negative supply rail (or GND in single-supply operation). Total supply voltage V+ to V- must be between 2.7V and 5.5V (7.0V absolute max).
5	NC	unconnected	No internal connection. Leave floating or tie to a static potential.
6	Output	output	Rail-to-rail amplifier output. Swings within 10mV of each supply rail with a 10k-ohm load. Output current +/-40mA typ, short-circuit +/-80mA.
7	V+	power_in	Positive supply rail. Operating range 2.7V to 5.5V with respect to V-. Quiescent current typ. 5.2mA per amplifier.
8	NC	unconnected	No internal connection. Leave floating or tie to a static potential.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

OPA350UA
OPA350UA/2K5
OPA350EA/250
OPA350EA/2K5
OPA350PA
OPA350UAOPA2350UA
OPA350UAOPA2350UA/2K5
OPA350UAOPA2350EA/250
OPA350UAOPA2350EA/2K5
OPA350UAOPA2350PA
OPA350UAOPA4350UA
OPA350UAOPA4350UA/2K5
OPA350UAOPA4350EA/250
OPA350UAOPA4350EA/2K5

CAD (KiCad official)

Symbol: OPA350UA
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`opa350ua.step`	122 KB	You want the bare part, or you mark your own boards.
`opa350ua-etched.step`	1.9 MB	You want the part with `OPA350UA` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 465 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (28 pp, sha256 84420571ada2f45c, 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