# OPA237NA

**Texas Instruments** · Precision OpAmps · SOT-23-5

OPA237NA from Texas Instruments, in a SOT-23-5. 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 | NC | unconnected | No internal connection. Leave floating or tie to any convenient net; not used by the die. |
| 2 | -IN | input | Inverting input of the op-amp. High-impedance analog input (differential 5 MΩ || 4 pF, common-mode 5 TΩ || 2 pF). Absolute maximum common-mode range (V-) - 0.7 V to (V+) + 0.7 V. |
| 3 | +IN | input | Noninverting input of the op-amp. High-impedance analog input (differential 5 MΩ || 4 pF, common-mode 5 TΩ || 2 pF). Common-mode range extends from (V-) - 0.2 V to (V+) - 1.5 V. |
| 4 | V- | power_in | Negative (lowest) power supply. Connect to GND for single-supply operation or to the negative rail for dual-supply operation. Total supply (V+ - V-) 2.7 V to 36 V; 36 V absolute maximum. |
| 5 | NC | unconnected | No internal connection. Leave floating or tie to any convenient net; not used by the die. |
| 6 | OUT | output | Op-amp output. Rail-to-rail-ish output that swings to within ~10 mV of the negative rail with light load. Short-circuit current ~7 mA sourcing / 10 mA sinking; output short-circuit-protected continuously. |
| 7 | V+ | power_in | Positive (highest) power supply. Total supply (V+ - V-) 2.7 V to 36 V; 36 V absolute maximum. Bypass with 0.1 µF close to the pin. |
| 8 | NC | unconnected | No internal connection. Leave floating or tie to any convenient net; not used by the die. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Op-amp/Cmp |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `OPA237NAD`
- `OPA237NA`
- `OPA237NADBV`

## CAD (KiCad official)

- Symbol: `OPA237NA`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `opa237na-etched.step` / `opa237na-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa237na.step` / `opa237na.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/opa237.pdf) (29 pp, sha256 `8afe5b03d4a30908`, 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/opa237na-datasheet.pdf)