# ACHS-7125-500E

**AVAGO(Broadcom)** · Current Sensors · SOP-8

ACHS-7125-500E from AVAGO(Broadcom), in a SOP-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 the current being sampled, fused internally; pins 1 and 2 are shorted together on the input side, and the ACHS-7125 input peak current range is ±50 A (valid up to 85°C ambient, derated above that on 4-oz copper PCB), with primary conductor lead temperature limited to +150°C. |
| 2 | IP+ | passive | Terminal for the current being sampled, fused internally; pins 1 and 2 are shorted together on the input side, and the ACHS-7125 input peak current range is ±50 A (valid up to 85°C ambient, derated above that on 4-oz copper PCB), with primary conductor lead temperature limited to +150°C. |
| 3 | IP- | passive | Terminal for the current being sampled, fused internally; pins 3 and 4 are shorted together on the input side, and the ACHS-7125 input peak current range is ±50 A (valid up to 85°C ambient, derated above that on 4-oz copper PCB), with primary conductor lead temperature limited to +150°C. |
| 4 | IP- | passive | Terminal for the current being sampled, fused internally; pins 3 and 4 are shorted together on the input side, and the ACHS-7125 input peak current range is ±50 A (valid up to 85°C ambient, derated above that on 4-oz copper PCB), with primary conductor lead temperature limited to +150°C. |
| 5 | GND | power_in | Output-side ground reference; the datasheet requires a 1 µF bypass capacitor between pins 8 and 5 and states the signal leads (pins 5 through 8) are electrically isolated from the primary conductor. |
| 6 | FILTER | passive | Filter pin to set the output bandwidth (80 kHz typ. with a 1 nF ceramic capacitor CF connected from FILTER to GND), replacing an external RC filter on VOUT. |
| 7 | VOUT | output | Ratiometric analog output voltage proportional to the input current, with zero-current level VDD/2 and a maximum output current of 10 mA source or sink; output capacitance load limited to 10 nF and resistive load at least 4.7 kΩ. |
| 8 | VDD | power_in | Supply voltage relative to GND, recommended 4.5 V to 5.5 V (absolute maximum 8.0 V), with a 1 µF bypass capacitor to pin 5 recommended. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | AVAGO(Broadcom) |
| Package | SOP-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 |
|---|---|---|---|---|---|---|---|
| Ambient Operating Temperature | TA | -40 |  | 110 | °C |  | 6 |
| Supply Voltage | VDD | 4.5 |  | 5.5 | V |  | 6 |
| Output Capacitance Load | CLOAD |  |  | 10 | nF |  | 6 |
| Output Resistive Load | RLOAD | 4.7 |  |  | kΩ |  | 6 |
| Input Peak Current Range ACHS-7125 | Ip | -50 |  | 50 | A | ACHS-7125; derate above 85°C ambient on 4-oz copper PCB (footnote a) | 6 |
| Storage Temperature | TS | -55 |  | 125 | °C |  | 5 |
| Ambient Operating Temperature | TA | -40 |  | 110 | °C |  | 5 |
| Junction Temperature | TJ |  |  | 150 | °C |  | 5 |
| Primary Conductor Lead Temperature | TL |  |  | 150 | °C | Pins 1, 2, 3, or 4 | 5 |
| Supply Voltages | VDD | -0.5 |  | 8 | V |  | 5 |
| Output Voltage | VOUT | -0.5 |  |  | V |  | 5 |
| Output Current Source | IOUT(source) |  |  | 10 | mA | TA = 25°C | 5 |
| Output Current Sink | IOUT(sink) |  |  | 10 | mA | TA = 25°C | 5 |
| Overcurrent Transient Tolerance | IP |  |  | 100 | A | 1 pulse, 100 ms; TA = 25°C | 5 |
| Input Power Dissipation | PIN |  |  | 1750 | mW | Valid up to 85°C ambient on 4-oz copper PCB; derate -25.2 mW/°C above 85°C | 5 |
| Output Power Dissipation | POUT |  |  | 90 | mW |  | 5 |
| Supply Current | IDD |  | 13 | 15 | mA | VDD = 5V, output open | 7 |
| Common Mode Transient Immunity | CMTI | 25 |  |  | kV/µs | VCM = 1000V | 7 |
| Optimized Accuracy Range | IP | -50 |  | 50 | A |  | 9 |
| Sensitivity Error | ESENS | -3 |  | 3 | % | TA = 25°C, VDD = 5V | 9 |
| Zero Current Output Error | VOE | -20 |  | 20 | mV | TA = 25°C | 9 |
| Total Output Error | ETOT | -1.5 |  | 1.5 | % | TA = 25°C; printed as ±1.5 in the typ column | 9 |
| Sensitivity Error Lifetime Drift | ESENS_DRIFT | -2 |  | 2 | % |  | 9 |
| Total Output Error Lifetime Drift | ETOT_DRIFT | -2 |  | 2 | % |  | 9 |
| Junction-to-Ambient Thermal Resistance (due to primary conductor) | Rθ12 |  | 35 |  | °C/W | Based on the Broadcom evaluation board (600 mm² 4-oz copper on pins 1-4) | 10 |
| Junction-to-Ambient Thermal Resistance (due to IC) | Rθ22 |  | 22 |  | °C/W | Based on the Broadcom evaluation board | 10 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| housing | Abs |  | Insulation and Safety Related Specifications Absolute Maximum Ratings | 5 |
| contacts | copper |  | through the primary 4 oz copper conduction path (from pins | 1 |

## CAD (KiCad official)

- Symbol: `ACHS-7125-500E`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `achs-7125-500e-etched.step` / `achs-7125-500e-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `achs-7125-500e.step` / `achs-7125-500e.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [AVAGO(Broadcom) datasheet](docs/achs-7125-500e-datasheet.pdf) (16 pp, sha256 `59de3513c95eaf39`, retrieved 2026-10-31, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-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/achs-7125-500e-datasheet.pdf)