OPA2171AIDR 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	OUT A	output	Amplifier A output. Rail-to-rail output stage; short-circuit current ±25/-35 mA typ; can drive capacitive loads up to 300pF stably.
2	-IN A	input	Inverting input of amplifier A. Input range includes the negative supply and extends to (V+) - 2V typ; input bias current 8pA typ; abs-max voltage (V-) - 0.5V to (V+) + 0.5V.
3	+IN A	input	Non-inverting input of amplifier A. Input range (V-) - 0.1V to (V+) - 2V typ; RFI-filtered input; 100MΩ differential impedance.
4	V-	power_in	Negative supply rail. Supply range +2.7V to +36V single-supply or ±1.35V to ±18V dual-supply (absolute max ±20V). Tie to GND for single-supply operation.
5	+IN B	input	Non-inverting input of amplifier B. Same characteristics as +IN A; input range (V-) - 0.1V to (V+) - 2V typ.
6	-IN B	input	Inverting input of amplifier B. Same characteristics as -IN A; input bias current 8pA typ.
7	OUT B	output	Amplifier B output. Rail-to-rail; short-circuit current ±25/-35 mA typ.
8	V+	power_in	Positive supply rail. Supply range +2.7V to +36V single-supply or ±1.35V to ±18V dual-supply; quiescent current 475µA/amplifier typ (950µA total for dual).

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.

OPA2171AIDR
OPA2171AIDRAIDCUT
OPA2171AIDRAIDCUR
OPA2171AIDRAIDGK
OPA2171AIDRAIDGKR

CAD (KiCad official)

Symbol: OPA2171AIDR
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
`opa2171aidr.step`	122 KB	You want the bare part, or you mark your own boards.
`opa2171aidr-etched.step`	1.8 MB	You want the part with `OPA2171AIDR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 476 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 (34 pp, sha256 d70bd45a5d8264dd, 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