ACS725LLCTR-10AU-T from Allegro MicroSystems LLC, 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	IP+	passive	Primary current sense terminal (positive side). Tied to pin 2 internally; both pins carry the sensed current entering the internal copper conduction path (1.2 mΩ typ). Galvanically isolated from the signal-side pins.
2	IP+	passive	Primary current sense terminal (positive side). Tied to pin 1 internally as part of the internal copper conduction path used for current sensing.
3	IP-	passive	Primary current sense terminal (negative side / return). Tied to pin 4 internally; both pins form the current-out leg of the internal 1.2 mΩ copper conduction path. Galvanically isolated from the signal-side pins.
4	IP-	passive	Primary current sense terminal (negative side / return). Tied to pin 3 internally as part of the internal copper conduction path used for current sensing.
5	GND	power_in	Signal-ground terminal. Reference for VCC, VIOUT, and FILTER on the electrically isolated signal side of the device.
6	FILTER	passive	External bandwidth-setting capacitor pin. A user-selected capacitor (e.g. 1 nF, referenced to GND) sets the low-pass corner of the output amplifier, trading response speed for reduced noise.
7	VIOUT	output	Analog output voltage. Ratiometric to VCC, biased at VCC/2 quiescent, and swings proportionally with the bidirectional primary current IP (sensitivity is variant-dependent, e.g. 264 mV/A at VCC = 3.3 V for the 10AU variant).
8	VCC	power_in	Device power-supply terminal. Nominal 3.3 V single-supply operation (absolute max 6 V). Bypass locally with a 0.1 µF ceramic capacitor to GND.

Key specifications

Parameter	Value
Manufacturer	Allegro MicroSystems LLC
Package	SOIC-8
Category	Sensor
Pins	8

Ordering variants

ACS725LLCTR-10AU-T
ACS725LLCTR-10AU-TACS725LLCTR-10AU-S

CAD (KiCad official)

Symbol: ACS725LLCTR-10AU-T
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: Allegro MicroSystems LLC datasheet (20 pp, sha256 8d8dc74eb087bf95, 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