# OPA2227UA

**Texas Instruments** · Precision OpAmps · SOIC-8

OPA2227UA from Texas Instruments, in a SOIC-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Out A | output | Amplifier A output. Class-AB output stage; +/-45mA typical short-circuit current, drives loads down to 600 ohm with V- +3.5V to V+ -3.5V swing. |
| 2 | -In A | input | Inverting input of amplifier A. Bipolar input with +/-2.5nA typical (10nA max) bias current, +/-2.5nA typical offset current. Common-mode range V- +2V to V+ -2V. |
| 3 | +In A | input | Non-inverting input of amplifier A. Same DC/AC specs as -In A; differential input impedance 10^7 ohm || 12 pF. |
| 4 | V- | power_in | Negative supply rail. Operating range -2.5V to -18V referenced to V+ (total Vs = 5V to 36V). Quiescent current 3.7mA typ per amplifier. |
| 5 | +In B | input | Non-inverting input of amplifier B. Bipolar input, +/-2.5nA typ bias, common-mode range V- +2V to V+ -2V. |
| 6 | -In B | input | Inverting input of amplifier B. Same specs as +In B; 10^9 ohm || 3 pF common-mode input impedance. |
| 7 | Out B | output | Amplifier B output. Class-AB output stage matched to Out A; channel separation 110 dB at 1kHz, 5k ohm load. |
| 8 | V+ | power_in | Positive supply rail. Operating range +2.5V to +18V referenced to V-. Absolute maximum supply voltage +/-18V; bypass with 0.1uF ceramic to V-. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Op-amp/Cmp |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `OPA2227UAU`
- `OPA2227UA`
- `OPA2227UAP`

## CAD (KiCad official)

- Symbol: `OPA2227UA`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `opa2227ua-etched.step` / `opa2227ua-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa2227ua.step` / `opa2227ua.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/lit/ds/symlink/opa2227ua.pdf) (27 pp, sha256 `9c1e133dfda319a3`, retrieved 2026-08-17, tier: manufacturer)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/opa2227ua-datasheet.pdf)