# OPA604AU

**Texas Instruments** · FET Input Amplifiers · SOIC-8

OPA604AU from Texas Instruments, in a SOIC-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 | Offset Trim | passive | Offset null pin used with a trim potentiometer (50kΩ to 1MΩ, 100kΩ recommended) for about ±50mV typical trim range; may be left unconnected. |
| 2 | -In | input | Inverting input; input voltage must stay within (V-)-1V to (V+)+1V, with typical common-mode range of ±13V at VS=±15V. |
| 3 | +In | input | Non-inverting input; input voltage must stay within (V-)-1V to (V+)+1V, with typical common-mode range of ±13V at VS=±15V. |
| 4 | -VS | power_in | Negative supply; operating voltage range is ±4.5V to ±24V total supply with absolute maximum ±25V, and a 1µF tantalum capacitor at the pin is usually adequate for decoupling. |
| 5 | Offset Trim | passive | Offset null pin used with a trim potentiometer (50kΩ to 1MΩ, 100kΩ recommended) for about ±50mV typical trim range; may be left unconnected. |
| 6 | Output | output | Op amp output that drives a 600Ω load to typically ±11V to ±12V, with short-circuit current of about ±40mA and continuous short circuit to ground allowed. |
| 7 | +VS | power_in | Positive supply; operating voltage range is ±4.5V to ±24V total supply with absolute maximum ±25V, and a 1µF tantalum capacitor at the pin is usually adequate for decoupling. |
| 8 | NC | unconnected | No internal connection. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `OPA604AU`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `opa604au-etched.step` / `opa604au-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa604au.step` / `opa604au.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/opa604) (21 pp, sha256 `ebd9255f985ebf1b`, retrieved 2026-10-01, tier: lcsc)
- **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/opa604au-datasheet.pdf)