# ACS714LLCTR-20A-T

**Allegro MicroSystems, LLC** · Current Sensors · SOIC-8

ACS714LLCTR-20A-T from Allegro MicroSystems, LLC, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IP+ | passive | Terminal for current being sampled, fused internally and electrically connected to pin 2; current path runs from pins 1 and 2 to pins 3 and 4 with 1.2 mΩ typical resistance. |
| 2 | IP+ | passive | Terminal for current being sampled, fused internally and electrically connected to pin 1; current path runs from pins 1 and 2 to pins 3 and 4 with 1.2 mΩ typical resistance. |
| 3 | IP- | passive | Terminal for current being sampled, fused internally and electrically connected to pin 4; isolated from signal pins 5 through 8 (2.1 kVRMS minimum). |
| 4 | IP- | passive | Terminal for current being sampled, fused internally and electrically connected to pin 3; isolated from signal pins 5 through 8 (2.1 kVRMS minimum). |
| 5 | GND | power_in | Signal ground terminal. |
| 6 | FILTER | passive | Terminal for external capacitor CF to ground that sets the bandwidth (1 nF in the typical application). |
| 7 | VIOUT | output | Analog output signal proportional to the sampled current, with VCC×0.5 at 0 A; load must be at least 4.7 kΩ and at most 10 nF to GND. |
| 8 | VCC | power_in | Device power supply terminal, 4.5 V to 5.5 V (5.0 V typical), with 0.1 µF bypass capacitor. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Allegro MicroSystems, LLC |
| Package | SOIC-8 |
| Category | Sensors |
| Pins | 8 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 4.5 | 5 | 5.5 | V |  | 4 |
| Supply Current | ICC |  | 10 | 13 | mA | VCC = 5.0 V, output open | 4 |
| Output Capacitance Load | CLOAD |  |  | 10 | nF | VIOUT to GND | 4 |
| Output Resistive Load | RLOAD | 4.7 |  |  | kΩ | VIOUT to GND | 4 |
| Symmetry | ESYM | 98 | 100 | 102 | % | Over full range of IP | 4 |
| Sensitivity (full temp) | Sens | 94 |  | 104 | mV/A | Over full range of IP, TA = -40°C to 150°C | 6 |
| Electrical Output Voltage | VOE | -40 |  | 40 | mV | IP = 0 A | 6 |
| Total Output Error | ETOT | -5 |  | 5 | % | IP = ±20 A, TA = -40°C to 150°C | 6 |
| Optimized Accuracy Range | IP | -20 |  | 20 | A |  | 6 |
| Sensitivity (25°C) | Sens |  | 100 |  | mV/A | Over full range of IP, TA = 25°C | 6 |
| Noise | VNOISE(PP) |  | 11 |  | mV | Peak-to-peak, TA = 25°C, 100 mV/A programmed Sensitivity, CF = 47 nF, COUT = out, 2 kHz bandwidth | 6 |
| Zero Current Output Slope | ∆VOUT(Q) |  | -0.34 |  | mV/°C | TA = -40°C to 25°C | 6 |
| Zero Current Output Slope | ∆VOUT(Q) |  | -0.07 |  | mV/°C | TA = 25°C to 150°C | 6 |
| Sensitivity Slope | ∆Sens |  | 0.017 |  | mV/A/°C | TA = -40°C to 25°C | 6 |
| Sensitivity Slope | ∆Sens |  | -0.004 |  | mV/A/°C | TA = 25°C to 150°C | 6 |
| Total Output Error | ETOT |  | 1.5 |  | % | IP = ±20 A, TA = 25°C (printed ±1.5) | 6 |
| Primary Conductor Resistance | RPRIMARY |  | 1.2 |  | mΩ | TA = 25°C | 4 |
| Rise Time | tr |  | 3.5 |  | μs | IP = IP(max), TA = 25°C, COUT = open | 4 |
| Frequency Bandwidth | f |  | 80 |  | kHz | -3 dB, TA = 25°C; IP is 10 A peak-to-peak | 4 |
| Nonlinearity | ELIN |  | 1.5 |  | % | Over full range of IP | 4 |
| Power-On Time | tPO |  | 35 |  | µs | Output reaches 90% of steady-state level, TJ=25°C, 20 A present on leadframe | 4 |
| Magnetic Coupling |  |  | 12 |  | G/A |  | 4 |
| Internal Filter Resistance | RF(INT) |  | 1.7 |  | kΩ |  | 4 |
| Operating Internal Leadframe Temperature (L range) | TA | -40 |  | 150 | °C | L range | 4 |
| Supply Voltage | VCC |  |  | 8 | V |  | 2 |
| Reverse Supply Voltage | VRCC | -0.1 |  |  | V |  | 2 |
| Output Voltage | VIOUT |  |  | 8 | V |  | 2 |
| Reverse Output Voltage | VRIOUT | -0.1 |  |  | V |  | 2 |
| Output Current Source | IIOUT(Source) |  |  | 3 | mA |  | 2 |
| Output Current Sink | IIOUT(Sink) |  |  | 10 | mA |  | 2 |
| Overcurrent Transient Tolerance | IP |  |  | 100 | A | 1 pulse, 100 ms | 2 |
| Nominal Operating Ambient Temperature (Range L) | TA | -40 |  | 150 | °C | Range L | 2 |
| Maximum Junction Temperature | TJ(max) |  |  | 165 | °C |  | 2 |
| Storage Temperature | Tstg | -65 |  | 170 | °C |  | 2 |
| Dielectric Strength Test Voltage | VISO |  |  | 2100 | VAC | Agency type-tested for 60 seconds per UL standard 60950-1, 1st Edition | 2 |
| Junction-to-Lead Thermal Resistance | RθJL |  | 5 |  | °C/W | Mounted on the Allegro ASEK 714 evaluation board | 4 |
| Junction-to-Ambient Thermal Resistance | RθJA |  | 23 |  | °C/W | Mounted on the Allegro 85-0322 evaluation board, includes the power consumed by the board | 4 |

## CAD (KiCad official)

- Symbol: `ACS714LLCTR-20A-T`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `acs714llctr-20a-t-etched.step` / `acs714llctr-20a-t-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `acs714llctr-20a-t.step` / `acs714llctr-20a-t.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Allegro MicroSystems, LLC datasheet](docs/acs714llctr-20a-t-datasheet.pdf) (18 pp, sha256 `8e85191c250bffbc`, retrieved 2026-10-30, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/acs714llctr-20a-t-datasheet.pdf)