# OPA657N

**Texas Instruments** · FET Input Amplifiers · SOT-23-5

OPA657N from Texas Instruments, in a SOT-23-5. 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 | VOUT | output | Output of the amplifier, specified with a high output current of 70 mA in the datasheet features list. |
| 2 | -VS | power_in | Negative power supply; total supply voltage is limited to ±6.5 V absolute maximum, with 8 V to 12 V total recommended. |
| 3 | VIN+ | power_in | Noninverting input; input voltage must stay between -VS and +VS per the absolute maximum ratings. |
| 4 | VIN- | power_in | Inverting input; input voltage and differential input voltage are limited to -VS to +VS per the absolute maximum ratings. |
| 5 | +VS | power_in | Positive power supply; total supply voltage is limited to ±6.5 V absolute maximum, with 8 V to 12 V total recommended. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Amplifiers/Comparators |
| Pins | 5 |

## CAD (KiCad official)

- Symbol: `OPA657N`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `opa657n-etched.step` / `opa657n-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa657n.step` / `opa657n.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/opa657) (40 pp, sha256 `8d7a3a398f558fe9`, retrieved 2026-10-10, tier: lcsc)
- **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/opa657n-datasheet.pdf)