# INA181A3IDCKR

**TEXAS INSTRUMENTS** · Global Sourcing Parts · SC-70-6

INA181A3IDCKR from TEXAS INSTRUMENTS, in a SC-70-6. 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 | REF | input | Reference input that sets the output zero-current level; it may be set anywhere from 0 V to VS, and for unidirectional use it is tied to GND. |
| 2 | GND | power_in | Analog ground pin for the current-sense amplifier. |
| 3 | VS | power_in | Analog supply pin, specified for 2.7 V to 5.5 V. |
| 4 | IN+ | input | Positive current-sense amplifier input; for high-side sensing connect to the bus-voltage side of the sense resistor, and for low-side sensing connect to the load side. |
| 5 | IN- | input | Negative current-sense amplifier input; for high-side sensing connect to the load side of the sense resistor, and for low-side sensing connect to the ground side. |
| 6 | OUT | output | Output voltage pin, which swings between GND and VS and is limited to a maximum output current of 8 mA by the absolute maximum ratings. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | TEXAS INSTRUMENTS |
| Package | SC-70-6 |
| Category | Global Sourcing Parts |
| Pins | 6 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply voltage | VS |  |  | 6 | V |  | 7 |
| Differential input voltage | (VIN+)-(VIN-) | -26 |  | 26 | V |  | 7 |
| Common-mode input voltage | VCM | -0.3 |  | 26 | V | Referenced to GND (minimum GND, 0.3 V) | 7 |
| Input voltage range at REF pin |  | -0.3 |  |  | V | Referenced to GND; upper limit printed as VS + 0.3 V | 7 |
| Output voltage | VOUT | -0.3 |  |  | V | Referenced to GND; upper limit printed as VS + 0.3 V | 7 |
| Maximum output current | IOUT |  |  | 8 | mA |  | 7 |
| Operating temperature range, natural convection (absolute maximum) | TA | -55 |  | 150 | °C |  | 7 |
| Junction temperature | TJ |  |  | 150 | °C |  | 7 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 7 |
| Common-mode input voltage (IN+ and IN-) | VCM | -0.2 | 12 | 26 | V |  | 7 |
| Operating supply voltage | VS | 2.7 | 5 | 5.5 | V |  | 7 |
| Operating temperature range, natural convection | TA | -40 |  | 125 | °C |  | 7 |
| Common-mode rejection ratio, RTI | CMRR | 84 | 100 |  | dB | VIN+ = 0V to 26V, VSENSE = 0mV, TA = -40°C to +125°C | 8 |
| Input offset voltage, RTI | VOS | -150 | 25 | 150 | µV | VSENSE = 0mV, VIN+ = 0V | 8 |
| Input offset voltage, RTI | VOS | -500 | 100 | 500 | µV | VSENSE = 0mV | 8 |
| Offset voltage drift, RTI | dVOS/dT |  | 0.2 | 1 | µV/°C | VSENSE = 0mV, TA = -40°C to +125°C | 8 |
| Power supply rejection ratio, RTI | PSRR | -40 | 8 | 40 | µV/V | VS = 2.7V to 5.5V, VIN+ = 12V, VSENSE = 0mV | 8 |
| Input offset current | IIO | -0.05 |  | 0.05 | µA | VSENSE = 0mV | 8 |
| Gain error | EG | -1 | 0.1 | 1 | % | VOUT = 0.5V to VS, 0.5V, TA = -40°C to +125°C | 8 |
| Gain error vs temperature |  |  | 1.5 | 20 | ppm/°C | TA = -40°C to +125°C | 8 |
| Nonlinearity error |  | -0.01 |  | 0.01 | % | VOUT = 0.5V to VS, 0.5V | 8 |
| Maximum capacitive load |  |  |  | 1 | nF | No sustained oscillation | 8 |
| Voltage output swing to GND | VSN |  | 0.0005 | 0.005 | V | RL = 10kΩ to GND, TA = -40°C to +125°C; referenced to GND | 8 |
| Quiescent current (INA181) | IQ |  | 195 | 260 | µA | VSENSE = 0mV | 8 |
| Quiescent current (INA181) | IQ |  |  | 300 | µA | VSENSE = 0mV, TA = -40°C to +125°C | 8 |
| Gain (A3 device) | G |  | 100 |  | V/V | A3 device | 8 |
| Bandwidth (A3 device) | BW |  | 150 |  | kHz | A3 device, CLOAD = 10pF | 8 |
| Slew rate | SR |  | 2 |  | V/µs |  | 8 |
| Junction-to-ambient thermal resistance (DCK, SC70-6) | RθJA |  | 188 |  | °C/W | DCK (SC70) 6-pin package | 7 |
| Junction-to-case (top) thermal resistance (DCK, SC70-6) | RθJC(top) |  | 140.8 |  | °C/W | DCK (SC70) 6-pin package | 7 |
| Junction-to-board thermal resistance (DCK, SC70-6) | RθJB |  | 78.8 |  | °C/W | DCK (SC70) 6-pin package | 7 |
| Junction-to-top characterization parameter (DCK, SC70-6) | ψJT |  | 62.1 |  | °C/W | DCK (SC70) 6-pin package | 7 |
| Junction-to-board characterization parameter (DCK, SC70-6) | ψJB |  | 78.5 |  | °C/W | DCK (SC70) 6-pin package | 7 |

## CAD (KiCad official)

- Symbol: `INA181A3IDCKR`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SC-70-6 (KiCad packages3D, STEP)
- 3D model files: `ina181a3idckr-etched.step` / `ina181a3idckr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina181a3idckr.step` / `ina181a3idckr.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/ina181.pdf?ts=1739820416493) (62 pp, sha256 `022ecc5f4e9d0a5b`, retrieved 2026-10-18, 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/ina181a3idckr-datasheet.pdf)