# CH1311BDWVR

**Tokmas** · Isolation Amplifiers · SOIC-8

CH1311BDWVR from Tokmas, 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 | VDD1 | power_in | High-side power supply, 3.0 V to 5.5 V relative to GND1. |
| 2 | IN | input | Analog input, specified range -0.1V to 2V relative to GND1. |
| 3 | SHTDN | input | Shutdown input, active high, with internal pullup resistor. |
| 4 | GND1 | power_in | High-side analog ground. |
| 5 | GND2 | power_in | Low-side analog ground. |
| 6 | OUTN | output | Inverting analog output. |
| 7 | OUTP | output | Noninverting analog output. |
| 8 | VDD2 | power_in | Low-side power supply, 3.0V to 5.5V relative to GND2. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Tokmas |
| Package | SOIC-8 |
| Category | Signal Isolation Devices |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `CH1311BDWVR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ch1311bdwvr-etched.step` / `ch1311bdwvr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ch1311bdwvr.step` / `ch1311bdwvr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Tokmas datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8604447837337755648) (15 pp, sha256 `f436becf0b12eeef`, retrieved 2026-09-17, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/ch1311bdwvr-datasheet.pdf)