INA181A2IDBVR from Texas Instruments, in a SOT-23-6. 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	output	Analog output voltage. Vout = (VIN+ - VIN-) x Gain (50 V/V for A2). Drives rail-to-rail within output swing limits from GND to (V+ - 0.05V) typical.
2	GND	power_in	Ground reference for the device. Connect to system ground.
3	VS	power_in	Power supply input, 2.7V to 5.5V. Bypass with a 0.1 uF ceramic capacitor to GND placed close to the pin.
4	VIN-	input	Negative differential input. Connect to the load side of the current-sense shunt resistor. Common-mode range: -0.2V to +26V, independent of supply voltage.
5	VIN+	input	Positive differential input. Connect to the supply side of the current-sense shunt resistor. Common-mode range: -0.2V to +26V, independent of supply voltage.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOT-23-6
Category	Op-amp/Cmp
Pins	5

Ordering variants

Same part, different packaging or reel option.

INA181A2IDBVR
INA181A2IDBVT

CAD (KiCad official)

Symbol: INA181A2IDBVR
Footprint: Package_TO_SOT_SMD:SOT-23-6
3D model: SOT-23-6 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ina181a2idbvr.step`	97 KB	You want the bare part, or you mark your own boards.
`ina181a2idbvr-etched.step`	2.0 MB	You want the part with `INA181A2IDBVR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 531 faces against 117 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 (58 pp, sha256 f6bd362733887a4d, retrieved 2026-08-17, tier: lcsc)
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