INA271AQDRQ1 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	IN-	input	Negative differential sense input. Connect to the load side of the current-sense shunt resistor RS. Common-mode range -16 V to +80 V, IIB typ ±8 μA (max ±16 μA).
2	GND	power_in	Device ground reference for the supply and analog signals.
3	PRE_OUT	output	Preamplifier analog output. Drives the input node of an optional external single-pole RC filter that feeds BUF IN. Internal 96-kΩ source impedance (±30% initial, -2200 ppm/°C).
4	BUF_IN	input	Output-buffer analog input. Connect to the output of the external filter driven by PRE OUT (tie directly to PRE OUT when no filter is used). Buffer gain = 2 V/V; buffer input bias current typ -50 nA.
5	OUT	output	Analog voltage output = VSENSE × 20 V/V (INA271A-Q1 gain). Rail-to-rail: swings to within ~50 mV of GND and VS with a 10-kΩ load; output impedance 1.5 Ω; drives up to 10 nF without sustained oscillation.
6	VS	power_in	Positive supply, 2.7 V to 18 V. Quiescent current 700 μA typ (900 μA max). Bypass with 0.1 μF close to the pin.
7	NC	unconnected	No internal connection. Datasheet recommends tying this pin to ground.
8	IN+	input	Positive differential sense input. Connect to the supply side of the current-sense shunt resistor RS. Common-mode range -16 V to +80 V, independent of VS.

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.

INA271AQDRQ1

CAD (KiCad official)

Symbol: INA271AQDRQ1
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

Provenance

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

Datasheet: Texas Instruments datasheet (None pp, sha256 c5298837c411edb6, 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