CH70120AB5PR

@@ -0,0 +1,52 @@+# CH70120AB5PR++**COSEMITECH** · Current Sensors · SOIC-8++CH70120AB5PR from COSEMITECH, 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 | Positive terminal of the internal current-sense copper conduction path (fused with pin 2). Current flowing from IP+ (pins 1,2) into IP− (pins 3,4) yields a positive-slope output. Primary conductor resistance is 0.8 mΩ typical; electrically isolated from the sensor leads by 3000 VRMS. |+| 2 | IP+ | passive | Positive terminal of the internal current-sense copper conduction path (fused with pin 1). Carries the primary current being measured. Primary conductor resistance is 0.8 mΩ typical. |+| 3 | IP- | passive | Negative terminal of the internal current-sense copper conduction path (fused with pin 4). Return terminal for the primary current being measured. Electrically isolated from the low-voltage sensor leads (pins 5-8). |+| 4 | IP- | passive | Negative terminal of the internal current-sense copper conduction path (fused with pin 3). Return terminal for the primary current being measured. |+| 5 | GND | power_in | Signal ground reference for the sensor circuitry and the VIOUT output. |+| 6 | FILTER | passive | External filter-capacitor pin. A capacitor from FILTER to GND forms an RC low-pass with the internal 1.7 kΩ filter resistor to set the output bandwidth and adjust noise/resolution. Typical application uses ~10 nF for a bandwidth reduction, or the pin can be left with the recommended CF value from the electrical table. |+| 7 | VIOUT | output | Analog output voltage proportional to the sensed primary current. For the CH70120AB5 (bidirectional, ratiometric, 5 V supply), VIOUT = VCC/2 at 0 A with sensitivity 100 mV/A over ±20 A. Recommended load ≥4.7 kΩ; output can swing from VOL (≤0.2 V) to VOH (≥VCC−0.2 V). |+| 8 | VCC | power_in | Device power-supply input. Nominal 5 V ±0.5 V for the CH70120AB5 variant (absolute max 6 V). Supply current ICC ≈ 10 mA typical (14 mA max). Decouple with ~0.1 µF to GND close to the pin; VIOUT is ratiometric to this rail. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | COSEMITECH |+| Package | SOIC-8 |+| Category | Sensor |+| Pins | 8 |++## Ordering variants++Same part, different packaging or reel option.++- `CH70120AB5PR`+- `CH70120AB3PR`+- `CH70120BB5PR`+- `CH70120CB3PR`++## CAD (KiCad official)++- Symbol: `CH70120AB5PR`+- 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:** [COSEMITECH datasheet](docs/ch70120ab5pr-datasheet.pdf) (62 pp, sha256 `bc54e9c5ff632dd6`, 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/ch70120ab5pr-datasheet.pdf)

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