# REF5040IDGKR

**Texas Instruments** · Voltage Reference · VSSOP-8

REF5040IDGKR from Texas Instruments, in a VSSOP-8. 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 | DNC | unconnected | Do not connect; this pin is reserved and must not be tied to any signal. |
| 2 | VIN | power_in | Input supply voltage; for REF50xxI/AI the input must be between VOUT + 0.2 V (minimum) and 18 V (maximum). |
| 3 | TEMP | output | Temperature monitoring output giving a temperature-dependent voltage (VTEMP = 509 mV + 2.64 mV/°C × T for REF50xxI/AI) with about 60 kΩ source impedance, accurate to roughly ±15°C, and it should be buffered with a low-drift op amp when loaded. |
| 4 | GND | power_in | Ground reference pin for the device. |
| 5 | TRIM/NR | passive | Output adjustment or noise reduction pin on the REF50xxI/AI variant; the datasheet does not state a voltage or current limit for this pin on this grade. |
| 6 | VOUT | power_out | Reference voltage output, rated for sourcing and sinking output current of ±10 mA (IOUT range −10 mA to 10 mA) with an absolute maximum of 5.5 V. |
| 7 | NC | unconnected | No internal connection; the datasheet says to leave this pin floating or connect it to GND. |
| 8 | DNC | unconnected | Do not connect; this pin is reserved and must not be tied to any signal. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `REF5040IDGKR`
- Footprint: `Package_SO:VSSOP-8_2.3x2mm_P0.5mm`
- 3D model: VSSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ref5040idgkr-etched.step` / `ref5040idgkr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ref5040idgkr.step` / `ref5040idgkr.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/lit/ds/symlink/ref50.pdf) (52 pp, sha256 `6c25f3e72085f076`, retrieved 2026-10-10, tier: lcsc)
- **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/ref5040idgkr-datasheet.pdf)