component
CH70120CB3PR
Public Made by Adomby adom
COSEMITECH Current Sensors, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownCH70120CB3PR
COSEMITECH · Current Sensors · SOP-8
CH70120CB3PR from COSEMITECH, 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 sensed, fused internally; current flows from pins 1 and 2 to pins 3 and 4 and gives a positive output slope. |
| 2 | IP+ | passive | Terminal for the current being sensed, fused internally; current flows from pins 1 and 2 to pins 3 and 4 and gives a positive output slope. |
| 3 | IP- | passive | Terminal for the current being sensed, fused internally; the primary conductor path (1-2 to 3-4) has about 0.8 mΩ typical internal resistance. |
| 4 | IP- | passive | Terminal for the current being sensed, fused internally; the primary conductor path (1-2 to 3-4) has about 0.8 mΩ typical internal resistance. |
| 5 | GND | power_in | Signal ground terminal; the primary conductor terminals (pins 1-4) are electrically isolated from the sensor leads (pins 5-8). |
| 6 | FILTER | passive | Terminal for an external capacitor that sets the bandwidth of the device. |
| 7 | VIOUT | output | Analog output signal, ratio-metric to the supply; absolute maximum output voltage is VCC + 0.5 V and reverse output voltage is -0.1 V minimum. |
| 8 | VCC | power_in | Device power supply terminal; absolute maximum supply voltage is 6 V and reverse supply voltage is -0.1 V minimum. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | COSEMITECH |
| Package | SOP-8 |
| Category | Magnetic 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 Current | ICC | 10 | 14 | mA | VCC = 5 V, output open | 8 | |
| Output Capacitance Load | CL | 10 | nF | VIOUT to GND | 8 | ||
| Output Resistive Load | RL | 4.7 | kΩ | VIOUT to GND | 8 | ||
| Nonlinearity | ELIN | -1 | 1 | % | Through full range of IP | 8 | |
| Saturation Voltage (low) | VOL | 0.2 | V | RL = 4.7 kΩ, TA = 25°C | 8 | ||
| Supply Voltage | VCC | 3 | 3.6 | V | 27 | ||
| Current-Sensing Range | IPR | -20 | 20 | A | 27 | ||
| Total Output Error | ETOT | -2 | 0.8 | 2 | % | IP = IPR(max), Tj = -40°C to 150ºC | 27 |
| Sensitivity Error | Esens | -1.5 | 0.6 | 1.5 | % | IP = IPR(max), Tj = -40°C to 150°C | 27 |
| Offset Voltage | VOE | -10 | 5 | 10 | mV | IP = 0 A, Tj = -40°C to 150ºC | 27 |
| Sensitivity Error Lifetime Drift | Esens_drift | -1 | 1 | % | 9 | ||
| Total Output Error Lifetime Drift | Etot_drift | -1 | 1 | % | 9 | ||
| Supply Voltage | VCC | 6 | V | 6 | |||
| Reverse Supply Voltage | VRCC | -0.1 | V | 6 | |||
| Reverse Output Voltage | VRIOUT | -0.1 | V | 6 | |||
| Operating Ambient Temperature | TA | -40 | 150 | °C | 6 | ||
| Storage Temperature | TS | -65 | 165 | °C | 6 | ||
| Junction Temperature | TJ(max) | 165 | °C | 6 | |||
| Package Thermal Resistance (Junction to Ambient) | RθJA | 23 | ºC/W | 7 | |||
| Package Thermal Resistance (Junction to Lead) | RθJL | 5 | ºC/W | 7 |
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 |
|---|---|---|---|---|
| contacts | copper | when an increasing current flows through the primary copper conduction path (from pins 1 and 2, to | 2 |
CAD (KiCad official)
- Symbol:
CH70120CB3PR - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
ch70120cb3pr-etched.step/ch70120cb3pr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ch70120cb3pr.step/ch70120cb3pr.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: COSEMITECH datasheet (62 pp, sha256
bc54e9c5ff632dd6, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).