# OPA2277UM

**HGSEMI** · Operational Amplifier · SOP-8

OPA2277UM from HGSEMI, in a SOP-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 | Out A | output | Output channel A of the OPA2277 dual amplifier, which swings to within 2 V of the supply rails at RL = 10 kΩ. |
| 2 | -In A | input | Inverting input of channel A, with a 1-kΩ series input resistor and diode clamps for protection. |
| 3 | +In A | input | Noninverting input of channel A, with a common-mode range of (V-)+2 V to (V+)-2 V. |
| 4 | V- | power_in | Negative (lowest) power supply; the device operates from ±2 V to ±16 V total supply. |
| 5 | +In B | input | Noninverting input of channel B, with a common-mode range of (V-)+2 V to (V+)-2 V. |
| 6 | -In B | input | Inverting input of channel B, with a 1-kΩ series input resistor and diode clamps for protection. |
| 7 | Out B | output | Output channel B of the OPA2277 dual amplifier, which swings to within 2 V of the supply rails at RL = 10 kΩ. |
| 8 | V+ | power_in | Positive (highest) power supply; the maximum supply voltage is 32 V (±16 V). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HGSEMI |
| Package | SOP-8 |
| Category | Amplifiers/Comparators |
| 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 |
|---|---|---|---|---|---|---|---|
| Input Offset Voltage | V0S |  | 10 | 100 | µV | TA = 25°C | 8 |
| Input Offset Voltage over temperature | V0S |  | 20 |  | µV | TA = -20°C to 85°C | 8 |
| Input Offset Voltage Drift | dV0S/dT |  | 0.1 | 0.25 | µV/°C | TA = -20°C to 85°C, OPA2277U (high-grade, dual) | 8 |
| Power supply rejection ratio | PSRR |  | 0.3 | 0.5 | µV/V | VS = ±2 V to ±16 V | 8 |
| Power supply rejection ratio over temperature | PSRR |  | 0.5 | 1 | µV/V | TA = -20°C to 85°C | 8 |
| Input Bias Current | IB |  | 0.5 | 1 | nA | TA = 25°C | 9 |
| Input Bias Current over temperature | IB |  | 2 | 4 | nA | TA = -20°C to 85°C | 9 |
| Input Offset Current | IOS |  | 0.5 | 1 | nA | TA = 25°C | 9 |
| Input Offset Current over temperature | IOS |  | 2 | 4 | nA | TA = -20°C to 85°C | 9 |
| Input Voltage Noise |  |  | 0.22 |  | µVPP | f = 0.1 to 10 Hz | 9 |
| Input Voltage Noise Density |  |  | 12 |  | nV/√Hz | f = 10 Hz | 9 |
| Input Voltage Noise Density |  |  | 8 |  | nV/√Hz | f = 100 Hz | 9 |
| Input Current Noise Density |  |  | 0.2 |  | pA/√Hz | f = 1 kHz | 9 |
| Common-Mode Rejection | CMRR | 130 | 140 |  | dB | VCM = (V-)+2 V to (V+)-2 V | 9 |
| Common-Mode Rejection over temperature | CMRR | 128 |  |  | dB | TA = -20°C to 85°C | 9 |
| Open-Loop Voltage Gain | AOL | 126 | 134 |  | dB | VO = (V-)+1.5 V to (V+)-1.5 V, RL = 2 kΩ | 9 |
| Gain-Bandwidth Product | GBW |  | 1 |  | MHz |  | 9 |
| Slew Rate | SR |  | 0.8 |  | V/µs |  | 9 |
| Settling Time 0.1% |  |  | 14 |  | µs | VS = ±15 V, G = 1, 10-V step | 9 |
| Settling Time 0.01% |  |  | 16 |  | µs | VS = ±15 V, G = 1, 10-V step | 9 |
| Overload Recovery Time |  |  | 3 |  | µs | VIN × G = VS | 9 |
| Total Harmonic Distortion+Noise | THD+N |  | 0.002 |  | % | 1 kHz, G = 1, VO = 3.5 Vrms | 9 |
| Short-Circuit Current | ISC |  | 35 |  | mA |  | 10 |
| Open-loop output impedance | ZO |  | 40 |  | Ω | f = 1 MHz | 10 |
| Specified Voltage Range | VS | 5 |  | 15 | V | Single limit applies over ±5 V to ±15 V | 10 |
| Operating Voltage Range |  | 2 |  | 16 | V | Supply ±2 V to ±16 V | 10 |
| Quiescent Current (per amplifier) | IQ |  | 1 | 3.5 | mA | IO = 0 | 10 |
| Specified Temperature Range |  | -20 |  | 85 | °C | Specified range | 10 |
| Operating Temperature Range |  | -20 |  | 125 | °C | Operating range | 10 |
| Supply voltage | Vs |  |  | 36 | V | Vs = (V+), (V-) | 6 |
| Operating temperature |  | -20 |  | 85 | °C | over operating free-air temperature range | 6 |
| Junction temperature |  |  |  | 150 | °C |  | 6 |
| Lead temperature |  |  |  | 260 | °C | 10 s | 6 |
| Storage temperature | Tstg | -20 |  | 125 | °C |  | 6 |
| Supply voltage | Vs | 4 | 30 | 32 | V | Vs = (V+), (V-); MIN 4 (±2), NOM 30 (±15), MAX 32 (±16) | 6 |
| Specified temperature |  | -20 |  | 85 | °C | over operating free-air temperature range | 6 |
| Junction-to-ambient thermal resistance | RθJA |  | 107.4 |  | °C/W | OPA2277 M (SOP) | 7 |
| Junction-to-case (top) thermal resistance | RθJC(top) |  | 45.8 |  | °C/W | OPA2277 M (SOP) | 7 |
| Junction-to-board thermal resistance | RθJB |  | 47.9 |  | °C/W | OPA2277 M (SOP) | 7 |
| Junction-to-top characterization parameter | ψJT |  | 5.7 |  | °C/W | OPA2277 M (SOP) | 7 |
| Junction-to-board characterization parameter | ψJB |  | 47.3 |  | °C/W | OPA2277 M (SOP) | 7 |

## CAD (KiCad official)

- Symbol: `OPA2277UM`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `opa2277um-etched.step` / `opa2277um-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa2277um.step` / `opa2277um.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](docs/opa2277um-datasheet.pdf) (23 pp, sha256 `7cff3ab2ae68c1e8`, retrieved 2026-10-27, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `off` (skipped (clean text read)), 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/opa2277um-datasheet.pdf)