# THS4120IDGK

**Texas Instruments** · Differential Amplifiers · MSOP-8

THS4120IDGK from Texas Instruments, in a MSOP-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 | VIN− | power_in | Inverting differential input; absolute maximum differential input voltage is ±VDD and input voltage is ±VDD. |
| 2 | VOCM | input | Output common-mode voltage control input that sets VOC of the fully differential amplifier; for proper operation, keep VOCM symmetry with matched Rf and Rg. |
| 3 | VDD | power_in | Positive supply; the datasheet gives a 3.3 V operating example and an absolute maximum supply voltage of 3.6 V (GND to VDD). |
| 4 | VOUT+ | output | Non-inverting differential output; output current (sink) is limited to 110 mA absolute maximum. |
| 5 | VOUT− | output | Inverting differential output; output current (sink) is limited to 110 mA absolute maximum. |
| 6 | GND | power_in | Ground reference for the supply, specified as the GND terminal of the supply voltage rating (GND to VDD, 3.6 V maximum). |
| 7 | PD | input | Power-down pin; for proper functionality an external 10 kΩ pullup resistor is required between PD and the positive supply. |
| 8 | VIN+ | power_in | Non-inverting differential input; absolute maximum differential input voltage is ±VDD and input voltage is ±VDD. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | MSOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `THS4120IDGK`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ths4120idgk-etched.step` / `ths4120idgk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ths4120idgk.step` / `ths4120idgk.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/cn/lit/gpn/ths4121) (37 pp, sha256 `705c359dabda7e27`, retrieved 2026-10-11, 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/ths4120idgk-datasheet.pdf)