# INA141U

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

INA141U 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 | J | input | Gain-select pin: leaving the jumper open sets G = 10 V/V, shorting pins 1 and 8 sets G = 100 V/V, and a 0.5 Ω series resistance in the jumper reduces gain by 0.1%. |
| 2 | V- IN | power_in | Negative (inverting) signal input of the instrumentation amplifier. |
| 3 | V+ IN | power_in | Positive (non-inverting) signal input of the instrumentation amplifier. |
| 4 | V- | power_in | Negative power supply; the device operates from ±2.25 V to ±18 V dual supplies or 4.5 V to 36 V single supply. |
| 5 | Ref | input | Reference input, which must be driven from a low-impedance source to maintain good common-mode rejection. |
| 6 | VO | output | Amplifier output, which is the output reference for the Ref pin connection and is referenced to the Ref pin voltage. |
| 7 | V+ | power_in | Positive power supply; the device operates from ±2.25 V to ±18 V dual supplies or 4.5 V to 36 V single supply. |
| 8 | J | input | Second gain-select pin paired with pin 1: leaving the jumper open sets G = 10 V/V, and shorting pins 1 and 8 sets G = 100 V/V. |

## Key specifications

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

## CAD (KiCad official)

- Symbol: `INA141U`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ina141u-etched.step` / `ina141u-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina141u.step` / `ina141u.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/ina141) (29 pp, sha256 `7d9a0b29cc8d248b`, retrieved 2026-10-10, 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-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/ina141u-datasheet.pdf)