# INA2181A1IDGSR

**Texas Instruments** · Current Sense Amplifiers · VSSOP-10-0.5mm

INA2181A1IDGSR from Texas Instruments, in a VSSOP-10-0.5mm. 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 | OUT1 | output | Channel 1 analog output voltage proportional to measured current across sense resistor. |
| 2 | IN-1 | input | Channel 1 current sense amplifier negative input; connect to load side for high-side sensing or to ground side for low-side sensing configuration. |
| 3 | IN+1 | input | Channel 1 current sense amplifier positive input; connect to bus voltage side for high-side sensing or to load side for low-side sensing configuration. |
| 4 | GND | power_in | Analog ground reference for the differential measurement circuit. |
| 5 | REF1 | input | Channel 1 reference input for setting output baseline voltage, operating range 0V to VS. |
| 6 | REF2 | input | Channel 2 reference input for setting output baseline voltage, operating range 0V to VS. |
| 7 | IN+2 | input | Channel 2 current sense amplifier positive input; connect to bus voltage side for high-side sensing or to load side for low-side sensing configuration. |
| 8 | IN-2 | input | Channel 2 current sense amplifier negative input; connect to load side for high-side sensing or to ground side for low-side sensing configuration. |
| 9 | OUT2 | output | Channel 2 analog output voltage proportional to measured current across sense resistor. |
| 10 | VS | power_in | Analog power supply input pin, operating range 2.7V to 5.5V. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-10-0.5mm |
| Category | Amplifiers/Comparators |
| Pins | 10 |

## CAD (KiCad official)

- Symbol: `INA2181A1IDGSR`
- Footprint: `Package_SO:MSOP-10_3x3mm_P0.5mm`
- 3D model: VSSOP-10-0.5mm (KiCad packages3D, STEP)
- 3D model files: `ina2181a1idgsr-etched.step` / `ina2181a1idgsr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina2181a1idgsr.step` / `ina2181a1idgsr.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/cn/lit/ds/symlink/ina2181.pdf) (62 pp, sha256 `16077f586e92eff4`, retrieved 2026-10-03, 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/ina2181a1idgsr-datasheet.pdf)