INA186A2IDDFR from Texas Instruments, in a TSOT-23-8. 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	VS	power_in	Power supply input, 1.7 V to 5.5 V. Bypass to GND with a 0.1 uF ceramic capacitor placed close to the pin.
2	ENABLE	input	Digital enable input. Drive to VS to enable the amplifier for normal current-sense operation. Drive to GND to disable the device, which reduces supply current and puts the output in a high-impedance state. Must be driven externally or tied to VS when unused; available only on DDF and YFD packages.
3	REF	input	Reference voltage input. An externally applied voltage on this pin enables bidirectional current sensing by offsetting the output. Available only on DCK and SC70 packages plus DDF; devices without a REF pin tie the internal REF node to GND.
4	GND	power_in	Ground / analog return.
5	OUT	output	Analog output. Provides an output voltage equal to the differential input voltage (IN+ minus IN-) multiplied by the device gain (50 V/V for the A2 option), added to the REF pin voltage.
6	NC	unconnected	No internal connection. May be left floating, tied to ground, or connected to the supply.
7	IN+	input	Positive input of the current-sense amplifier. For high-side applications connect to the bus-side (supply-side) of the sense resistor; for low-side applications connect to the load-side of the sense resistor.
8	IN-	input	Negative input of the current-sense amplifier. For high-side applications connect to the load-side of the sense resistor; for low-side applications connect to the ground-side of the sense resistor.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSOT-23-8
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

INA186A2IDDFR
INA186A2IDDFT
INA186A2IDDFRIDCKR
INA186A2IDDFRIDCKT
INA186A2IDDFRIYFDR
INA186A2IDDFRIYFDT

CAD (KiCad official)

Symbol: INA186A2IDDFR
Footprint: Package_TO_SOT_SMD:SOT-23-8
3D model: TSOT-23-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`ina186a2iddfr.step`	123 KB	You want the bare part, or you mark your own boards.
`ina186a2iddfr-etched.step`	2.3 MB	You want the part with `INA186A2IDDFR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 590 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 (47 pp, sha256 1517831c6395c89f, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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