# REF102CU

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

REF102CU from Texas Instruments, in a SOIC-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 | NC | unconnected | Not connected; the datasheet marks this pin as NC with no internal connection. |
| 2 | V+ | power_in | Positive supply input; single-supply operation from 11.4V to 36V is specified. |
| 3 | NC | unconnected | Not connected; the datasheet marks this pin as NC with no internal connection. |
| 4 | Com | power_in | Common (ground) reference for the reference; interconnection resistance should be minimized. |
| 5 | Trim | input | Output voltage trim input; trim range is ±3% and trimming slightly affects drift. |
| 6 | VOUT | power_out | 10V precision reference output; output current is specified at +10mA source and -5mA sink. |
| 7 | NC | unconnected | Not connected; the datasheet marks this pin as NC with no internal connection. |
| 8 | Noise Reduction | passive | A capacitor from this pin to ground forms a low-pass filter with internal R6 to attenuate zener noise. |

## Key specifications

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

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Initial output voltage | VOUT | 9.9975 |  | 10.0025 | V | TA = 25°C | 3 |
| Output voltage vs supply (line regulation) |  |  |  | 1 | ppm/V | VS = 11.4V to 36V | 3 |
| Output voltage vs output current (load regulation) |  |  |  | 10 | ppm/mA | IL = 0mA to +10mA | 3 |
| Output voltage vs output current (load regulation) |  |  |  | 20 | ppm/mA | IL = 0mA to -5mA | 3 |
| Output voltage drift vs temperature |  |  |  | 2.5 | ppm/°C | box method | 3 |
| Long-term stability vs time |  |  |  | 20 | ppm/1000hr | TA = +25°C, P, U Packages | 3 |
| Initial error tolerance |  | -2.5 |  | 2.5 | mV |  | 2 |
| Trim range |  | -3 |  | 3 | % |  | 3 |
| Capacitive load |  |  |  | 1000 | pF |  | 3 |
| Input voltage range | VS | 11.4 |  | 36 | V |  | 3 |
| Output current | IOUT | -5 |  | 10 | mA |  | 3 |
| Quiescent current | IQ |  |  | 1.4 | mA | IOUT = 0 | 3 |
| Noise |  |  | 5 |  | µVPP | 0.1Hz to 10Hz | 3 |
| Warm-up time |  |  | 15 |  | µs | To 0.1% | 3 |
| Specification temperature range |  | -25 |  | 85 | °C | REF102A, B, C | 3 |
| Input voltage |  |  |  | 40 | V |  | 2 |
| Operating temperature |  | -25 |  | 85 | °C | P, U | 2 |
| Storage temperature range |  | -40 |  | 125 | °C | P, U | 2 |

## CAD (KiCad official)

- Symbol: `REF102CU`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `ref102cu-etched.step` / `ref102cu-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ref102cu.step` / `ref102cu.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/ref102.pdf) (19 pp, sha256 `5860560fea70aa71`, retrieved 2026-11-05, tier: manufacturer)
- **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/ref102cu-datasheet.pdf)