# GS2904-SR

**Gainsil** · Operational Amplifier · SOP-8

GS2904-SR from Gainsil, 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 | OUTA | output | Output of amplifier A, with output swing from 0V to Vcc-1.5V and about 40mA source/sink current. |
| 2 | INA- | input | Inverting input of amplifier A, with input common-mode range including ground (-0.1V to VCC-1.5V). |
| 3 | INA+ | input | Non-inverting input of amplifier A, with input common-mode range including ground (-0.1V to VCC-1.5V). |
| 4 | VSS | power_in | Negative supply or ground for single-supply operation, in dual-supply operation down to -18V. |
| 5 | INB+ | input | Non-inverting input of amplifier B, with input common-mode range including ground (-0.1V to VCC-1.5V). |
| 6 | INB- | input | Inverting input of amplifier B, with input common-mode range including ground (-0.1V to VCC-1.5V). |
| 7 | OUTB | output | Output of amplifier B, with output swing from 0V to Vcc-1.5V and about 40mA source/sink current. |
| 8 | VDD | power_in | Positive supply, operating from +3V to +36V single supply (up to +18V in dual-supply operation). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Gainsil |
| 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 | VOS |  | 0.4 | 5 | mV | VCM = VS/2 | 3 |
| Common-Mode Rejection Ratio | CMRR | 60 | 70 |  | dB | VCM = 0V to Vs-1.5V | 3 |
| Open-Loop Voltage Gain | AOL | 85 | 100 |  | dB | RL = 5kΩ, VO = 1V to 11V | 3 |
| Power Supply Rejection Ratio | PSRR | 70 | 100 |  | dB | VS = +5V to +36V, VCM = +0.5V | 3 |
| Output Voltage Swing from Rail (high) | VOH | 11 |  |  | V | RL = 2kΩ | 3 |
| Output Voltage Swing from Rail (high) | VOH | 13 | 12 |  | V | RL = 10kΩ | 3 |
| Output Voltage Swing from Rail (low) | VOL |  | 5 | 20 | mV | RL = 2kΩ | 3 |
| Output Current (source) | ISOURCE |  | 40 | 60 | mA | RL = 10Ω to VS/2 | 3 |
| Output Current (sink) | ISINK |  | 40 | 60 | mA | RL = 10Ω to VS/2 | 3 |
| Operating Voltage Range |  | 3 |  | 36 | V |  | 3 |
| Quiescent Current / Amplifier | IQ |  | 1 | 3 | mA | VS = 36V, RL=∞ | 3 |
| Power Supply Voltage | Vcc |  |  | 36 | V |  | 2 |
| Differential Input Voltage | VI(DIFF) |  |  | 36 | V |  | 2 |
| Input Voltage | VI | -0.3 |  | 36 | V |  | 2 |
| Operating Temperature Range | Topr | -40 |  | 125 | °C |  | 2 |
| Storage Temperature Range | Tstg | -65 |  | 150 | °C |  | 2 |

## CAD (KiCad official)

- Symbol: `GS2904-SR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `gs2904-sr-etched.step` / `gs2904-sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `gs2904-sr.step` / `gs2904-sr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Gainsil datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603178316954419200) (9 pp, sha256 `5306d86b6101c50e`, retrieved 2026-10-21, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/gs2904-sr-datasheet.pdf)