# APX321WG-7

**Diodes Incorporated** · Operational Amplifier · SOT-25

APX321WG-7 from Diodes Incorporated, in a SOT-25. 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 | IN+ | input | Non-inverting input with a common-mode range of 0 to V+ -0.2V (rail-to-rail input), and differential input voltage limited to ±supply voltage. |
| 2 | V- | power_in | Negative supply (ground in single-supply use, V- = 0V), with total supply V+ - V- of 2.5V to 5.5V. |
| 3 | IN- | input | Inverting input with a common-mode range of 0 to V+ -0.2V, and differential input voltage limited to ±supply voltage. |
| 4 | OUT | output | Rail-to-rail amplifier output swinging to within 10 mV of V+ and V- at 10 kΩ load; short circuit to either supply adversely affects reliability. |
| 5 | V+ | power_in | Positive supply, 2.5V to 5.5V relative to V- (absolute maximum 5.5V), with typical supply current of 110 µA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-25 |
| Category | Operational Amplifier/Comparator |
| Pins | 5 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Offset Voltage (2.7V) | VOS |  | 1.7 | 7 | mV |  | 4 |
| Input Offset Current (2.7V) | IOS |  | 5 | 50 | nA |  | 4 |
| Common Mode Rejection Ratio (2.7V) | CMRR | 50 | 63 |  | dB | 0V ≤ VCM ≤ 2.4V | 4 |
| Power Supply Rejection Ratio (2.7V) | PSRR | 50 | 60 |  | dB | 2.7V ≤ V+ ≤ 5V, VO = 1V | 4 |
| Input Common-Mode Voltage Range (2.7V) | VCMR | 0 |  | 2.5 | V | For CMRR ≥ 50dB | 4 |
| Output Swing low side (2.7V) | VO |  | 20 | 100 | mV | RL = 10 kΩ to 1.35V | 4 |
| Supply Current, single amplifier (2.7V) | IS |  | 110 | 140 | µA | Single amplifier | 4 |
| Input Offset Voltage (5V) | VOS |  | 1.7 | 7 | mV |  | 5 |
| Input Offset Voltage (5V, temperature extremes) | VOS |  |  | 9 | mV | Boldface limit, temperature extremes | 5 |
| Input Bias Current (5V) | IB |  | 15 | 250 | nA |  | 5 |
| Input Bias Current (5V, temperature extremes) | IB |  |  | 500 | nA | Boldface limit, temperature extremes | 5 |
| Input Offset Current (5V) | IOS |  | 5 | 50 | nA |  | 5 |
| Input Offset Current (5V, temperature extremes) | IOS |  |  | 150 | nA | Boldface limit, temperature extremes | 5 |
| Common Mode Rejection Ratio (5V) | CMRR | 50 | 65 |  | dB | 0V ≤ VCM ≤ 4.7V | 5 |
| Power Supply Rejection Ratio (5V) | PSRR | 50 | 60 |  | dB | 2.7V ≤ V+ ≤ 5V, VO = 1V, VCM = 1V | 5 |
| Input Common-Mode Voltage Range (5V) | VCMR | 0 |  | 4.8 | V | For CMRR ≥ 50dB | 5 |
| Large Signal Voltage Gain (5V) | AV | 15 | 100 |  | V/mV | RL = 2 kΩ (Note 11) | 5 |
| Large Signal Voltage Gain (5V, temperature extremes) | AV | 10 |  |  | V/mV | Boldface limit, temperature extremes; RL = 2 kΩ (Note 11) | 5 |
| Output Swing low side, RL=2kΩ (5V) | VO |  | 50 | 300 | mV | RL = 2 kΩ to 2.5V | 5 |
| Output Swing low side, RL=2kΩ (5V, temperature extremes) | VO |  |  | 400 | mV | Boldface limit, temperature extremes; RL = 2 kΩ to 2.5V | 5 |
| Output Swing low side, RL=10kΩ (5V) | VO |  | 10 | 180 | mV | RL = 10 kΩ to 2.5V | 5 |
| Output Swing low side, RL=10kΩ (5V, temperature extremes) | VO |  |  | 280 | mV | Boldface limit, temperature extremes; RL = 10 kΩ to 2.5V | 5 |
| Output Short Circuit Current, sourcing | IO | 5 | 60 |  | mA | Sourcing, VO = 0V | 5 |
| Output Short Circuit Current, sinking | IO | 10 | 90 |  | mA | Sinking, VO = 5V | 5 |
| Supply Current, single amplifier (5V) | IS |  | 110 | 140 | µA | Single amplifier | 5 |
| Thermal Resistance Junction-to-Ambient, SOT25 | θJA |  | 250 |  | °C/W | SOT25 (Note 12) | 5 |
| ESD Human Body Model (APX321) | ESD |  |  | 4000 | V | HBM, APX321 | 3 |
| ESD Machine Model (APX321) | ESD |  |  | 350 | V | MM, APX321 | 3 |
| Supply Voltage | V+ -V- |  |  | 5.5 | V |  | 3 |
| Storage Temperature | TST | -65 |  | 150 | °C |  | 3 |
| Maximum Junction Temperature | TJ |  |  | 150 | °C |  | 3 |
| Supply Voltage (operating) | V+ -V- | 2.5 |  | 5.5 | V |  | 3 |
| Operating Ambient Temperature Range | TA | -40 |  | 85 | °C |  | 3 |

## CAD (KiCad official)

- Symbol: `APX321WG-7`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-25 (KiCad packages3D, STEP)
- 3D model files: `apx321wg-7-etched.step` / `apx321wg-7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `apx321wg-7.step` / `apx321wg-7.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/APX321WG-7.pdf) (18 pp, sha256 `6f4400af0052c530`, retrieved 2026-10-30, 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/apx321wg-7-datasheet.pdf)