# INA219AIDCNR

**Texas Instruments** · Current Sense Amplifiers · SOT-23-8

INA219AIDCNR from Texas Instruments, in a SOT-23-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IN+ | input | Positive differential shunt voltage input. Connect to the positive side of the external current-sense shunt resistor. Common-mode range 0 V to 26 V, differential range ±26 V (absolute max), input bias current ~20 uA in active mode. |
| 2 | IN- | input | Negative differential shunt voltage input. Connect to the negative side of the shunt resistor; bus voltage is measured from this pin to ground. Input impedance ~20 kOhm || 320 pF in active mode. |
| 3 | GND | power_in | Device ground reference for the analog and digital circuitry. |
| 4 | VS | power_in | Power supply input, 3 V to 5.5 V (absolute max 6 V). Typical supply current ~1 mA. |
| 5 | SCL | input | I2C/SMBus serial clock input (open-drain, requires external pull-up). Logic thresholds: VIH >= 0.7*VS, VIL <= 0.3*VS. |
| 6 | SDA | bidirectional | I2C/SMBus serial data line (open-drain, requires external pull-up). Open-drain sink capability up to 10 mA. |
| 7 | A0 | input | I2C slave-address select pin 0. Tie to GND, VS, SDA, or SCL to encode 4 of the 16 programmable device addresses (see Table 1). |
| 8 | A1 | input | I2C slave-address select pin 1. Tie to GND, VS, SDA, or SCL together with A0 to program one of 16 device addresses (see Table 1). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `INA219AIDCNR`
- `INA219AIDCNT`
- `INA219AIDCNRIDR`

## CAD (KiCad official)

- Symbol: `INA219AIDCNR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-8`
- 3D model: SOT-23-8 (KiCad packages3D, STEP)
- 3D model files: `ina219aidcnr-etched.step` / `ina219aidcnr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina219aidcnr.step` / `ina219aidcnr.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/ina219) (38 pp, sha256 `2c973858ed829073`, retrieved 2026-08-17, 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:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/ina219aidcnr-datasheet.pdf)