# OPA2991IPWR

**Texas Instruments** · Operational Amplifier · TSSOP-8

OPA2991IPWR from Texas Instruments, in a TSSOP-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 | OUT A | output | Output of channel A. |
| 2 | -IN A | input | Inverting input of channel A; differential input range extends to the full 40-V supply span. |
| 3 | +IN A | input | Noninverting input of channel A; common-mode range extends 100 mV beyond either supply rail. |
| 4 | V- | power_in | Negative (lowest) supply; total supply (V+)-(V-) rated 2.7 V to 40 V. |
| 5 | +IN B | input | Noninverting input of channel B; common-mode range extends 100 mV beyond either supply rail. |
| 6 | -IN B | input | Inverting input of channel B; differential input range extends to the full 40-V supply span. |
| 7 | OUT B | output | Output of channel B. |
| 8 | V+ | power_in | Positive (highest) supply; total supply (V+)-(V-) rated 2.7 V to 40 V, with a 0.1 µF bypass capacitor recommended nearby. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `OPA2991IPWR`
- Footprint: `Package_SO:TSSOP-8_3x3mm_P0.65mm`
- 3D model: TSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `opa2991ipwr-etched.step` / `opa2991ipwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa2991ipwr.step` / `opa2991ipwr.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/opa991) (87 pp, sha256 `d6030f5844d7c1ca`, retrieved 2026-10-03, 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/opa2991ipwr-datasheet.pdf)