# OPA4743UA

**Texas Instruments** · Operational Amplifier · SOIC-14

OPA4743UA from Texas Instruments, in a SOIC-14. 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 | Amplifier A output, rail-to-rail, swinging to within 100mV of the rails with a 100kΩ load and driving up to 1000pF of capacitive load. |
| 2 | -In A | input | Amplifier A inverting input, diode-clamped to the supply rails, so signals beyond 0.3V outside the rails should be limited to 10mA. |
| 3 | +In A | input | Amplifier A non-inverting input with common-mode range extending 100mV beyond the supply rails, diode-clamped with a 10mA limit. |
| 4 | V+ | power_in | Positive supply, 3.5V to 12V single supply (±1.75V to ±6V dual), 13.2V absolute maximum, bypassed with 1000pF ceramic in parallel with 1µF tantalum. |
| 5 | +In B | input | Amplifier B non-inverting input with common-mode range extending 100mV beyond the supply rails, diode-clamped with a 10mA limit. |
| 6 | -In B | input | Amplifier B inverting input, diode-clamped to the supply rails, so signals beyond 0.3V outside the rails should be limited to 10mA. |
| 7 | Out B | output | Amplifier B output, rail-to-rail, swinging to within 100mV of the rails with a 100kΩ load and driving up to 1000pF of capacitive load. |
| 8 | Out C | output | Amplifier C output, rail-to-rail, swinging to within 100mV of the rails with a 100kΩ load and driving up to 1000pF of capacitive load. |
| 9 | -In C | input | Amplifier C inverting input, diode-clamped to the supply rails, so signals beyond 0.3V outside the rails should be limited to 10mA. |
| 10 | +In C | input | Amplifier C non-inverting input with common-mode range extending 100mV beyond the supply rails, diode-clamped with a 10mA limit. |
| 11 | V- | power_in | Negative supply or ground for single-supply operation, with total V+ to V- limited to 13.2V absolute maximum. |
| 12 | +In D | input | Amplifier D non-inverting input with common-mode range extending 100mV beyond the supply rails, diode-clamped with a 10mA limit. |
| 13 | -In D | input | Amplifier D inverting input, diode-clamped to the supply rails, so signals beyond 0.3V outside the rails should be limited to 10mA. |
| 14 | Out D | output | Amplifier D output, rail-to-rail, swinging to within 100mV of the rails with a 100kΩ load and driving up to 1000pF of capacitive load. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-14 |
| Category | Amplifiers/Comparators |
| Pins | 14 |

## CAD (KiCad official)

- Symbol: `OPA4743UA`
- Footprint: `Package_SO:SOIC-14_3.9x8.7mm_P1.27mm`
- 3D model: SOIC-14 (KiCad packages3D, STEP)
- 3D model files: `opa4743ua-etched.step` / `opa4743ua-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa4743ua.step` / `opa4743ua.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/opa743) (18 pp, sha256 `44b87cfd1a1b26a1`, retrieved 2026-10-12, 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/opa4743ua-datasheet.pdf)