# OPA503ASOT235

**analogysemi** · Operational Amplifier · SOT23-5

OPA503ASOT235 from analogysemi, in a SOT23-5. 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 | OUT | output | Amplifier output, rail-to-rail, swinging to within 2 mV of the rails at VS = 1.8V. |
| 2 | V- | power_in | Negative (lowest) power supply. |
| 3 | +IN | input | Positive (non-inverting) input, rail-to-rail with about 0.1 pA bias current. |
| 4 | -IN | input | Negative (inverting) input, rail-to-rail with about 0.1 pA bias current. |
| 5 | V+ | power_in | Positive (highest) power supply, 1.6V to 5.5V operating range relative to V-, with a 100 nF capacitor placed close to V+/V-. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | analogysemi |
| Package | SOT23-5 |
| 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage |  | -0.3 |  | 6 | V |  | 4 |
| Signal input pins common-mode voltage |  | -0.3 |  | 0.3 | V | (V-), 0.3 to (V+) + 0.3 | 4 |
| Signal input pins differential voltage |  | -0.3 |  | 0.3 | V | (V-), 0.3 to (V+) + 0.3 | 4 |
| Signal input pins current |  | -10 |  | 10 | mA |  | 4 |
| Operating temperature | TA | -40 |  | 125 | °C |  | 4 |
| Junction temperature | TJ |  |  | 150 | °C |  | 4 |
| Storage temperature | Tstg | -65 |  | 150 | °C |  | 4 |
| ESD HBM | V(ESD) | -6000 |  | 6000 | V | Human-body model, ANSI/ESDA/JEDEC JS-001 | 4 |
| ESD CDM | V(ESD) | -2000 |  | 2000 | V | Charged-device model, JESD22-C101 | 4 |
| Operating voltage range |  | 1.6 |  | 5.5 | V |  | 5 |
| Specified temperature range |  | -40 |  | 125 | °C |  | 5 |
| Junction-to-ambient thermal resistance | RθJA |  | 168 |  | °C/W | SOT23-5 | 5 |
| Junction-to-board thermal resistance | RθJB |  | 39 |  | °C/W | SOT23-5 | 5 |
| Junction-to-top characterization parameter | ψJT |  | 10 |  | °C/W | SOT23-5 | 5 |
| Junction-to-board characterization parameter | ψJB |  | 36 |  | °C/W | SOT23-5 | 5 |
| Junction-to-case (top) thermal resistance | RθJC(top) |  | 103 |  | °C/W | SOT23-5 | 5 |
| Junction-to-case (bottom) thermal resistance | RθJC(bot) |  | 66 |  | °C/W | SOT23-5 | 5 |
| Input offset voltage | VOS |  | 52 | 210 | µV | VS = 1.8V, 3.3V, and 5V, VCM = VS /2 or VCM = (V+), 0.9V | 6 |
| Power-supply rejection ratio | PSRR |  | 15 | 93 | µV/V | VS = 1.8V to 5V, VCM = VDD/2 | 6 |
| Common-mode rejection ratio | CMRR | 77 | 94 |  | dB | (V-) ≤ VCM ≤ (V+), VS = 5V | 6 |
| Input bias current | IB | -100 |  | 100 | fA | VS = 1.8V, VCM = VS / 2 | 6 |
| Input offset current | IOS | -100 |  | 100 | fA | VS = 1.8V, VCM = VS / 2 | 6 |
| Voltage output swing from positive rail | VOH |  | 2 | 10 | mV | VS = 1.8V, RL = 100kΩ to (V+) / 2 | 6 |
| Voltage output swing from negative rail | VOL |  | 1.5 | 10 | mV | VS = 1.8V, RL = 100kΩ to (V+) / 2 | 6 |
| Quiescent current | IQ |  | 570 | 705 | nA | VCM = V-, IO = 0, VS = 3.3V | 6 |
| Input offset drift | ΔVOS/ΔT |  | 1.2 |  | µV/°C | VCM = V-, TA = -40°C to 125°C | 6 |
| Common-mode voltage range | VCM | 0 |  |  | V | upper limit printed as VDD | 6 |
| Open-loop voltage gain | AOL |  | 120 |  | dB | (V-) + 0.3V ≤ VO ≤ (V+), 0.3V, RL = 100kΩ | 6 |
| Short-circuit current | ISC |  | 10 |  | mA | VS = 3.3V, short to VS / 2 | 6 |
| Gain-bandwidth product | GBP |  | 11 |  | kHz | CL = 20pF, RL = 10MΩ, VS = 5V | 6 |
| Slew rate rising | SR |  | 3 |  | V/ms | G = 1, Rising Edge, CL = 20pF, VS = 5V | 6 |
| Slew rate falling | SR |  | 6 |  | V/ms | G = 1, Falling Edge, CL = 20pF, VS = 5V | 6 |
| Input voltage noise | En |  | 9.1 |  | μVpp | ƒ = 0.1Hz to 10Hz | 6 |
| Input voltage noise density | en |  | 214 |  | nV/√Hz | ƒ = 100Hz | 6 |
| Input voltage noise density | en |  | 238 |  | nV/√Hz | ƒ = 1kHz | 6 |
| Differential input impedance |  |  | 3.3 |  | pF |  | 6 |
| Common-mode input impedance |  |  | 7.2 |  | pF |  | 6 |

## CAD (KiCad official)

- Symbol: `OPA503ASOT235`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT23-5 (KiCad packages3D, STEP)
- 3D model files: `opa503asot235-etched.step` / `opa503asot235-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa503asot235.step` / `opa503asot235.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [analogysemi datasheet](docs/opa503asot235-datasheet.pdf) (18 pp, sha256 `074f06d45b89ff28`, retrieved 2026-10-27, 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-sonnet-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/opa503asot235-datasheet.pdf)