# REF3225AIDBVR

**Texas Instruments** · Voltage Reference · SOT-23-6

REF3225AIDBVR from Texas Instruments, in a SOT-23-6. 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 | GND_F | power_in | Ground force pin. Analog output; the ground connection of the device that carries the ground return current. Used in Kelvin (force/sense) configuration with GND_S to null out IR drops in ground routing. |
| 2 | GND_S | input | Ground sense pin. Analog input; connects at the load to sense the load-side ground potential, enabling force/sense (Kelvin) load regulation compensation. |
| 3 | ENABLE | input | Digital input that enables (V_H ≥ 1.5V, up to V_IN) or disables (V_L ≤ 0.7V) the reference. In shutdown, supply current drops to ~0.1µA (1µA max). May be tied to IN for input rise times ≤ 2ms. |
| 4 | IN | power_in | Positive supply voltage input. Analog input; operating range V_OUT + 0.05V (dropout) to 5.5V. Absolute maximum 7.5V. Quiescent current typ 100µA. |
| 5 | OUT_S | input | Output sense pin. Analog input; sense connection at the load used with OUT_F in a Kelvin/force-sense configuration to null out IR drops in the output trace and improve load regulation. |
| 6 | OUT_F | output | Output force pin. Analog output that sources the 2.5V reference voltage (REF3225). Delivers up to ±10mA and is stable with any capacitive load. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-6 |
| Category | PMIC |
| Pins | 6 |

## Ordering variants

Same part, different packaging or reel option.

- `REF3225AIDBVR`
- `REF3225AIDBVT`

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Output voltage | VOUT | 2.495 | 2.5 | 2.505 | V | TA = +25°C, ILOAD = 0mA, VIN = 5V | 3 |
| Initial accuracy |  | -0.2 | 0.01 | 0.2 | % | TA = +25°C, ILOAD = 0mA, VIN = 5V | 3 |
| Output voltage temperature drift, 0°C to +125°C | dVOUT/dT |  | 4 | 7 | ppm/°C | 0°C ≤ TA ≤ +125°C | 4 |
| Output voltage temperature drift, -40°C to +125°C | dVOUT/dT |  | 10.5 | 20 | ppm/°C | –40°C ≤ TA ≤ +125°C | 4 |
| Line regulation |  | -65 | 15 | 65 | ppm/V | VOUT + 0.05 ≤ VIN ≤ 5.5V | 4 |
| Load regulation, sourcing | dVOUT/dILOAD | -40 | 3 | 40 | µV/mA | 0mA < ILOAD < 10mA, VIN = VOUT + 250mV | 4 |
| Load regulation, sinking | dVOUT/dILOAD | -60 | 20 | 60 | µV/mA | –10mA < ILOAD < 0mA, VIN = VOUT + 100mV | 4 |
| Dropout voltage | VIN – VOUT |  | 5 | 50 | mV | 0°C ≤ TA ≤ +125°C | 4 |
| Output current | ILOAD | -10 |  | 10 | mA | VIN = VOUT + 250mV | 4 |
| Enable input low (reference in shutdown) | VL | 0 |  | 0.7 | V | Reference in Shutdown mode | 4 |
| Enable input high (reference active) | VH | 1.5 |  |  | V | Reference is active | 4 |
| Supply current (quiescent) | IQ |  | 100 | 120 | µA | IL = 0, ENABLE > 1.5V | 4 |
| Supply current (quiescent), over temperature | IQ |  | 115 | 135 | µA | 0°C ≤ TA ≤ +125°C | 4 |
| Shutdown supply current | IS |  | 0.1 | 1 | µA | ENABLE < 0.7V | 4 |
| Supply voltage | VIN |  |  | 5.5 | V | IL = 0 | 4 |
| Specified temperature range |  | -40 |  | 125 | °C |  | 4 |
| Input voltage |  |  |  | 7.5 | V |  | 2 |
| Operating temperature |  | -55 |  | 135 | °C | Over operating free-air temperature range | 2 |
| Storage temperature |  | -65 |  | 150 | °C |  | 2 |
| Junction temperature |  |  |  | 150 | °C |  | 2 |
| ESD human body model (HBM) |  |  |  | 4 | kV |  | 2 |
| ESD charged device model (CDM) |  |  |  | 1 | kV |  | 2 |
| ESD machine model (MM) |  |  |  | 400 | V |  | 2 |
| Thermal resistance, junction-to-ambient, SOT23-6 | θJA |  | 200 |  | °C/W |  | 4 |

## CAD (KiCad official)

- Symbol: `REF3225AIDBVR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-6`
- 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files: `ref3225aidbvr-etched.step` / `ref3225aidbvr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ref3225aidbvr.step` / `ref3225aidbvr.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`ref3225aidbvr.step`](ref3225aidbvr.step) | 97 KB | You want the bare part, or you mark your own boards. |
| [`ref3225aidbvr-etched.step`](ref3225aidbvr-etched.step) | 2.3 MB | You want the part with `REF3225AIDBVR` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 582 faces against 117 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/ref3225ai.pdf) (19 pp, sha256 `691719783e90148d`, retrieved 2026-08-17, tier: manufacturer)
- **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/ref3225aidbvr-datasheet.pdf)