# INA2141UA

**Texas Instruments** · Instrumentation Amplifiers · SOIC-16-300mil

INA2141UA from Texas Instruments, in a SOIC-16-300mil. 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 | VINA- | input | Inverting input of channel A, protected to ±40V. |
| 2 | VINA+ | input | Noninverting input of channel A, protected to ±40V. |
| 3 | JA | passive | Channel A gain-set jumper pin; G = 10V/V with no jumper to pin 4 and G = 100V/V with a low-resistance jumper installed. |
| 4 | JA | passive | Channel A gain-set jumper pin; connect to pin 3 with a low-resistance jumper for G = 100V/V (0.5Ω in series lowers gain by 0.1%). |
| 5 | RefA | input | Channel A output reference terminal, normally grounded and requiring a low-impedance connection to preserve CMR. |
| 6 | VOA | output | Channel A output, referred to RefA; drives loads of 10kΩ with stable load capacitance up to 1000pF. |
| 7 | SenseA | input | Channel A output sense feedback connection, which must be connected to the VOA output (or load) for proper operation. |
| 8 | V- | power_in | Negative supply voltage, operating range from -2.25V to -18V. |
| 9 | V+ | power_in | Positive supply voltage, operating range from +2.25V to +18V. |
| 10 | SenseB | input | Channel B output sense feedback connection, which must be connected to the VOB output (or load) for proper operation. |
| 11 | VOB | output | Channel B output, referred to RefB; drives loads of 10kΩ with stable load capacitance up to 1000pF. |
| 12 | RefB | input | Channel B output reference terminal, normally grounded and requiring a low-impedance connection to preserve CMR. |
| 13 | JB | passive | Channel B gain-set jumper pin; connect to pin 14 with a low-resistance jumper for G = 100V/V (0.5Ω in series lowers gain by 0.1%). |
| 14 | JB | passive | Channel B gain-set jumper pin; G = 10V/V with no jumper to pin 13 and G = 100V/V with a low-resistance jumper installed. |
| 15 | VINB+ | input | Noninverting input of channel B, protected to ±40V. |
| 16 | VINB- | input | Inverting input of channel B, protected to ±40V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16-300mil |
| Category | Amplifiers/Comparators |
| Pins | 16 |

## CAD (KiCad official)

- Symbol: `INA2141UA`
- Footprint: `Package_SO:SOIC-16_3.9x9.9mm_P1.27mm`
- 3D model: SOIC-16-300mil (KiCad packages3D, STEP)
- 3D model files: `ina2141ua-etched.step` / `ina2141ua-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina2141ua.step` / `ina2141ua.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/ina2141) (16 pp, sha256 `bc6511874b6cbe97`, retrieved 2026-10-11, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/ina2141ua-datasheet.pdf)