# INA253A3IPWR

**Texas Instruments** · Current Sense Amplifiers · TSSOP-20

INA253A3IPWR from Texas Instruments, in a TSSOP-20. 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 | IS- | input | Analog input connected to the load side of the internal shunt; connect to the load. |
| 2 | IS- | input | Analog input connected to the load side of the internal shunt; connect to the load. |
| 3 | IS- | input | Analog input connected to the load side of the internal shunt; connect to the load. |
| 4 | SH- | output | Kelvin connection to the internal shunt; connect to IN- if no filtering is needed. |
| 5 | IN- | input | Voltage input from the load side of the shunt resistor. |
| 6 | GND | power_in | Ground reference for the device. |
| 7 | DNC1 | unconnected | Do not connect this pin to any potential; leave it floating. |
| 8 | NC | unconnected | No connect. |
| 9 | VS | power_in | Analog power supply, 2.7 V to 5.5 V. |
| 10 | REF2 | input | Reference voltage 2 input, 0 V to VS; do not connect to any voltage below GND or above VS. |
| 11 | REF1 | input | Reference voltage 1 input, 0 V to VS; do not connect to any voltage below GND or above VS. |
| 12 | NC | unconnected | No connect. |
| 13 | OUT | output | Analog output voltage. |
| 14 | DNC2 | unconnected | Do not connect this pin to any potential; leave it floating. |
| 15 | NC | unconnected | Reserved analog pin; the datasheet says to connect it to ground. |
| 16 | IN+ | input | Voltage input from the supply side of the shunt resistor. |
| 17 | SH+ | output | Kelvin connection to the internal shunt; connect to IN+ if no filtering is needed. |
| 18 | IS+ | input | Analog input; connect to the supply. |
| 19 | IS+ | input | Analog input; connect to the supply. |
| 20 | IS+ | input | Analog input; connect to the supply. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | TSSOP-20 |
| Category | Amplifiers/Comparators |
| Pins | 20 |

## CAD (KiCad official)

- Symbol: `INA253A3IPWR`
- Footprint: `Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm`
- 3D model: TSSOP-20 (KiCad packages3D, STEP)
- 3D model files: `ina253a3ipwr-etched.step` / `ina253a3ipwr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina253a3ipwr.step` / `ina253a3ipwr.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/ina253) (36 pp, sha256 `aac4f0956c4235a7`, retrieved 2026-10-08, 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/ina253a3ipwr-datasheet.pdf)