# INA133UA

**Texas Instruments** · Differential Amplifiers · SOIC-8

INA133UA 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 | Ref | input | Reference input with maximum voltage VS and 25kΩ resistor connected to op-amp non-inverting terminal |
| 2 | -IN | input | Negative (inverting) input with maximum voltage 2×VS and 25kΩ resistor connected to op-amp inverting terminal |
| 3 | +IN | input | Positive (non-inverting) input with maximum voltage 2×VS and 25kΩ resistor connected to op-amp non-inverting terminal |
| 4 | V- | power_in | Negative (lowest) supply voltage, 0 to 36V total span with V+ |
| 5 | Sense | input | Sense input with maximum voltage VS and 25kΩ resistor connected to op-amp inverting terminal |
| 6 | Output | output | Amplifier output, operating voltage range (V-)+ 1V to (V+)-1.5V for gain error less than 0.1% |
| 7 | V+ | power_in | Positive (highest) supply voltage, 0 to 36V total span with V- |
| 8 | NC | unconnected | Not connected internally, can be left floating |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `INA133UA`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ina133ua-etched.step` / `ina133ua-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina133ua.step` / `ina133ua.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/ina133) (41 pp, sha256 `15b53f9e067f70ea`, retrieved 2026-10-01, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **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/ina133ua-datasheet.pdf)