# THS4121IDGNR

**Texas Instruments** · Differential Amplifiers · HVSSOP-8-EP

THS4121IDGNR from Texas Instruments, in a HVSSOP-8-EP. 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 input of the fully differential amplifier; input voltage is limited to ±VDD. |
| 2 | VOCM | input | Output common-mode voltage control input of the fully differential amplifier. |
| 3 | VDD | power_in | Positive supply, nominal 3.3 V with an absolute maximum of 3.6 V from GND to VDD. |
| 4 | VOUT+ | output | Non-inverting differential output, with output sink current limited to 110 mA absolute maximum. |
| 5 | VOUT− | output | Inverting differential output, with output sink current limited to 110 mA absolute maximum. |
| 6 | GND | power_in | Ground (negative supply) reference for the device. |
| 7 | NC | unconnected | No internal connection on the THS4121 (this pin is PD on the THS4120). |
| 8 | VIN+ | power_in | Non-inverting input of the fully differential amplifier; input voltage is limited to ±VDD. |
| 9 | EP | passive | Exposed pad (from the footprint; not named in the datasheet pin table). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | HVSSOP-8-EP |
| Category | Amplifiers/Comparators |
| Pins | 9 |

## CAD (KiCad official)

- Symbol: `THS4121IDGNR`
- Footprint: `Package_SO:HVSSOP-8-1EP_3x3mm_P0.65mm_EP1.57x1.89mm`
- 3D model: HVSSOP-8-EP, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.0 mm nominal HVSSOP height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
- 3D model files: `ths4121idgnr-etched.step` / `ths4121idgnr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ths4121idgnr.step` / `ths4121idgnr.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 2026-10-08, 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/ths4121idgnr-datasheet.pdf)