# OPA4991QPWRQ1

**Texas Instruments** · Operational Amplifier · TSSOP-14

OPA4991QPWRQ1 from Texas Instruments, in a TSSOP-14. 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 | OUT1 | output | Output of channel 1 with ±75mA short circuit current capability and 1nF capacitive load drive. |
| 2 | IN1− | input | Inverting input of channel 1, common mode input range (V−)−0.1V to (V+)+0.1V. |
| 3 | IN1+ | input | Non-inverting input of channel 1, common mode input range (V−)−0.1V to (V+)+0.1V. |
| 4 | V+ | power_in | Positive power supply, operating range 2.7V to 40V relative to V−. |
| 5 | IN2+ | input | Non-inverting input of channel 2, common mode input range (V−)−0.1V to (V+)+0.1V. |
| 6 | IN2− | input | Inverting input of channel 2, common mode input range (V−)−0.1V to (V+)+0.1V. |
| 7 | OUT2 | output | Output of channel 2 with ±75mA short circuit current capability and 1nF capacitive load drive. |
| 8 | OUT3 | output | Output of channel 3 with ±75mA short circuit current capability and 1nF capacitive load drive. |
| 9 | IN3− | input | Inverting input of channel 3, common mode input range (V−)−0.1V to (V+)+0.1V. |
| 10 | IN3+ | input | Non-inverting input of channel 3, common mode input range (V−)−0.1V to (V+)+0.1V. |
| 11 | V- | power_in | Negative power supply (ground reference), supply voltage range 2.7V to 40V. |
| 12 | IN4+ | input | Non-inverting input of channel 4, common mode input range (V−)−0.1V to (V+)+0.1V. |
| 13 | IN4− | input | Inverting input of channel 4, common mode input range (V−)−0.1V to (V+)+0.1V. |
| 14 | OUT4 | output | Output of channel 4 with ±75mA short circuit current capability and 1nF capacitive load drive. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-14 |
| Category | Amplifiers/Comparators |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `OPA4991QPWRQ1`
- Footprint: `Package_SO:TSSOP-14_4.4x5mm_P0.65mm`
- 3D model: TSSOP-14 (KiCad packages3D, STEP)
- 3D model files: `opa4991qpwrq1-etched.step` / `opa4991qpwrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa4991qpwrq1.step` / `opa4991qpwrq1.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/opa4991-q1) (65 pp, sha256 `ad18138f042f7147`, retrieved 2026-10-07, 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-4-5-20251001` (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/opa4991qpwrq1-datasheet.pdf)