# OPA4131UA

**Texas Instruments** · FET Input Amplifiers · SOIC-16-300mil

OPA4131UA from Texas Instruments, in a SOIC-16-300mil. 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 | OUT A | output | Output of channel A. |
| 2 | -IN A | input | Inverting input of channel A. |
| 3 | +IN A | input | Noninverting input of channel A. |
| 4 | V+ | power_in | Positive (highest) power supply. |
| 5 | +IN B | input | Noninverting input of channel B. |
| 6 | -IN B | input | Inverting input of channel B. |
| 7 | OUT B | output | Output of channel B. |
| 8 | NC | unconnected | No internal connection; float this pin. |
| 9 | NC | unconnected | No internal connection; float this pin. |
| 10 | OUT C | output | Output of channel C. |
| 11 | -IN C | input | Inverting input of channel C. |
| 12 | +IN C | input | Noninverting input of channel C. |
| 13 | V- | power_in | Negative (lowest) power supply. |
| 14 | +IN D | input | Noninverting input of channel D. |
| 15 | -IN D | input | Inverting input of channel D. |
| 16 | OUT D | output | Output of channel D. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Amplifiers/Comparators |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `OPA4131UA`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files: `opa4131ua-etched.step` / `opa4131ua-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa4131ua.step` / `opa4131ua.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/opa4131) (32 pp, sha256 `4de751b87581a378`, retrieved 2026-10-08, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/opa4131ua-datasheet.pdf)