ACS725LLCTR-20AB-T

@@ -0,0 +1,56 @@+# ACS725LLCTR-20AB-T++**Allegro MicroSystems LLC** · Current Sensors · SOP-8++ACS725LLCTR-20AB-T from Allegro MicroSystems LLC, in a SOP-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 input terminal (positive side of the sensed current path). Pins 1 and 2 are tied together internally to the copper conduction path (1.2 mΩ typical) that carries the primary current being sensed. Fused internally. |+| 2 | IP+ | passive | Primary current input terminal (positive side of the sensed current path). Pins 1 and 2 are tied together internally to the copper conduction path (1.2 mΩ typical). Fused internally. |+| 3 | IP- | passive | Primary current return terminal (negative side of the sensed current path). Pins 3 and 4 are tied together internally to the copper conduction path (1.2 mΩ typical). Fused internally. |+| 4 | IP- | passive | Primary current return terminal (negative side of the sensed current path). Pins 3 and 4 are tied together internally to the copper conduction path (1.2 mΩ typical). Fused internally. |+| 5 | GND | power_in | Signal ground terminal. Reference for VCC, VIOUT, and the FILTER capacitor. |+| 6 | FILTER | passive | Terminal for an external capacitor (C_F) that sets the output bandwidth. Forms an internal RC low-pass filter with R_F(int) = 1.8 kΩ typical; a 1 nF cap is used for the default 120 kHz bandwidth, larger caps reduce bandwidth for better noise performance. |+| 7 | VIOUT | output | Analog output voltage proportional to the sensed primary current I_P. Ratiometric to VCC with a quiescent output at VCC/2 and 66 mV/A sensitivity (typ) for the -20AB variant (±20 A range). Drives a resistive load ≥4.7 kΩ and capacitive load ≤10 nF. |+| 8 | VCC | power_in | Device power supply terminal. 3.3 V single-supply operation (3.0 V min, 3.6 V max); I_CC = 10 mA typ, 14 mA max. Bypass with 0.1 µF C_BYPASS to GND. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Allegro MicroSystems LLC |+| Package | SOP-8 |+| Category | Sensor |+| Pins | 8 |++## Ordering variants++- `ACS725LLCTR-20AB-TLLCTR-05AB-T`+- `ACS725LLCTR-20AB-TLLCTR-10AB-T`+- `ACS725LLCTR-20AB-TLLCTR-10AU-T`+- `ACS725LLCTR-20AB-T`+- `ACS725LLCTR-20AB-TLLCTR-20AU-T`+- `ACS725LLCTR-20AB-TLLCTR-30AB-T`+- `ACS725LLCTR-20AB-TLLCTR-30AB-T-H`+- `ACS725LLCTR-20AB-TLLCTR-30AU-T`+- `ACS725LLCTR-20AB-TLLCTR-40AB-T`+- `ACS725LLCTR-20AB-TLLCTR-50AB-T`++## CAD (KiCad official)++- Symbol: `ACS725LLCTR-20AB-T`+- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`+- 3D model: SOP-8 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Allegro MicroSystems LLC datasheet](docs/acs725llctr-20ab-t-datasheet.pdf) (24 pp, sha256 `2c79a87c5a09ef07`, 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](docs/acs725llctr-20ab-t-datasheet.pdf)

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