# OPA277M

**HGSEMI** · Precision Op Amps · SOP-8

OPA277M 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 | Offset Trim | passive | Input offset voltage trim pin for nulling the amplifier offset only; leave floating if not used. |
| 2 | -In | input | Inverting input of the operational amplifier. |
| 3 | +In | input | Noninverting input of the operational amplifier. |
| 4 | V- | power_in | Negative (lowest) power supply; the device operates from ±2 V to ±16 V (4 V to 32 V total span). |
| 5 | NC | unconnected | No internal connection; can be left floating. |
| 6 | Output | output | Amplifier output. |
| 7 | V+ | power_in | Positive (highest) power supply; the device operates from ±2 V to ±16 V (4 V to 32 V total span). |
| 8 | Offset Trim | passive | Input offset voltage trim pin for nulling the amplifier offset only; leave floating if not used. |

## 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage (absolute maximum) | Vs |  |  | 36 | V | Vs = (V+), (V-) | 6 |
| Input voltage (absolute maximum, referenced to (V-) and (V+)) |  | -0.7 |  | 0.7 | V |  | 6 |
| Operating temperature (absolute maximum) |  | -20 |  | 85 | °C |  | 6 |
| Junction temperature (absolute maximum) |  |  |  | 150 | °C |  | 6 |
| Lead temperature, 10 s (absolute maximum) |  |  |  | 260 | °C | 10 s | 6 |
| Storage temperature (absolute maximum) | Tstg | -20 |  | 125 | °C |  | 6 |
| ESD, Human-body model (HBM) | V(ESD) | -2000 |  | 2000 | V | HBM, per ANSI/ESDA/JEDEC JS-001 | 6 |
| ESD, Charged-device model (CDM) | V(ESD) | -500 |  | 500 | V | CDM, per JEDEC JESD22-C101 | 6 |
| Supply voltage (recommended operating) | Vs | 4 | 30 | 32 | V | Vs = (V+), (V-); printed as 4(±2), 30(±15), 32(±16) | 6 |
| Specified temperature (recommended operating) |  | -20 |  | 85 | °C |  | 6 |
| Input offset voltage over temperature | V0S | -250 |  | 250 | µV | TA = -20°C to 85°C; All Versions | 8 |
| Input offset voltage (initial) | V0S | -100 | 10 | 100 | µV | TA = 25°C, RL = 2 kΩ; typ from Features list, ±100 µV max from family description | 2 |
| Specified voltage range | VS | 5 |  | 15 | V | printed ±5 ±15; single limit applies over ±5 V to ±15 V | 10 |
| Operating voltage range |  | 2 |  | 16 | V | printed ±2 ±16 | 10 |
| Quiescent current, per amplifier | IQ |  | 1 | 3.5 | mA | IO = 0; max applies at TA = -20°C to 85°C | 10 |
| Specified temperature range (electrical) |  | -20 |  | 85 | °C |  | 10 |
| Operating temperature range (electrical) |  | -20 |  | 125 | °C |  | 10 |
| Junction-to-ambient thermal resistance (SOP-8, M) | RθJA |  | 110.1 |  | °C/W | OPA277 M (SOP) | 6 |
| Junction-to-case (top) thermal resistance (SOP-8, M) | RθJC(top) |  | 52.2 |  | °C/W | OPA277 M (SOP) | 6 |
| Junction-to-board thermal resistance (SOP-8, M) | RθJB |  | 52.3 |  | °C/W | OPA277 M (SOP) | 6 |
| Junction-to-top characterization parameter (SOP-8, M) | ψJT |  | 10.4 |  | °C/W | OPA277 M (SOP) | 6 |
| Junction-to-board characterization parameter (SOP-8, M) | ψJB |  | 51.5 |  | °C/W | OPA277 M (SOP) | 6 |

## CAD (KiCad official)

- Symbol: `OPA277M`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `opa277m-etched.step` / `opa277m-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `opa277m.step` / `opa277m.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HGSEMI datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8756657930580041728) (23 pp, sha256 `7cff3ab2ae68c1e8`, retrieved 2026-10-18, tier: lcsc)
- **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/opa277m-datasheet.pdf)