# COS4890SR

**COSINE** · Audio Power OpAmps · SOP-8

COS4890SR from COSINE, 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 | SHDN | input | Shutdown control: the device enters shutdown mode when a logic low is applied (VIL max 0.4V, VIH min 1.2V). |
| 2 | BYPASS | passive | Bypass capacitor pin which provides half-supply filtering. |
| 3 | +IN | input | Positive input of the first amplifier, connected to the half-supply common mode voltage. |
| 4 | -IN | input | Negative input of the first amplifier, connected to the load and to the input resistor RIN and feedback resistor RF. |
| 5 | VO1 | output | Negative output, connected to the load and the feedback resistor RF. |
| 6 | VDD | power_in | Analog power supply, 2.5V to 5.5V recommended operating range (6V absolute maximum). |
| 7 | GND | power_in | Ground. |
| 8 | VO2 | output | Positive output, connected to the load. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSINE |
| Package | SOP-8 |
| Category | Operational Amplifier/Comparator |
| 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 |
|---|---|---|---|---|---|---|---|
| Shutdown Current | ISHDN |  | 0.01 | 1 | µA | Vshutdown=0V; VDD=+5V, TA=+25°C | 4 |
| Shutdown Voltage Input High | VSDIH | 1.2 |  |  | V | VDD=+5V, TA=+25°C | 4 |
| Shutdown Voltage Input Low | VSDIL |  |  | 0.4 | V | VDD=+5V, TA=+25°C | 4 |
| Output Offset Voltage | VOS |  | 5 | 25 | mV | VDD=+5V, TA=+25°C, RL=8Ω | 4 |
| Quiescent Current, no load | IQ |  | 3.6 |  | mA | VIN=0V, no load | 4 |
| Quiescent Current, 8Ω load | IQ |  | 3.8 |  | mA | VIN=0V, 8Ω load | 4 |
| Output Power | PO |  | 1.2 |  | W | VDD=5.2V, RL=8Ω, THD=1%, f=1KHz | 4 |
| Total Harmonic Distortion Plus Noise | THD+N |  | 0.123 |  | % | VDD=5V, RL=8Ω, Po=1W, f=1KHz | 4 |
| Total Harmonic Distortion Plus Noise | THD+N |  | 0.13 |  | % | VDD=3.6V, RL=8Ω, Po=0.5W, f=1KHz | 4 |
| Total Harmonic Distortion Plus Noise | THD+N |  | 0.163 |  | % | VDD=2.5V, RL=8Ω, Po=0.2W, f=1KHz | 4 |
| Power Supply Rejection Ratio | PSRR |  | 60 |  | dB | f=217Hz | 4 |
| Power Supply Rejection Ratio | PSRR |  | 68 |  | dB | f=1KHz | 4 |
| Wake up time | TWU |  | 140 |  | ms | CBYPASS=1μF | 4 |
| Power Supply Voltage | VDD |  |  | 6 | V | VDD to GND | 3 |
| Input Voltage |  | -0.3 |  |  | V | -0.3V to VDD+0.3 | 3 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 3 |
| Junction Temperature | TJ |  |  | 150 | °C |  | 3 |
| Operating Temperature Range |  | -40 |  | 125 | °C |  | 3 |
| ESD Susceptibility, HBM |  |  |  | 2000 | V | HBM | 3 |
| Package Thermal Resistance (SOP8) |  |  | 155 |  | °C/W | SOP8 | 3 |
| DC Supply Voltage | VDD | 2.5 |  | 5.5 | V |  | 3 |
| Operating ambient temperature | TA | -40 |  | 85 | °C |  | 3 |

## CAD (KiCad official)

- Symbol: `COS4890SR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cos4890sr-etched.step` / `cos4890sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cos4890sr.step` / `cos4890sr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSINE datasheet](docs/cos4890sr-datasheet.pdf) (8 pp, sha256 `3ad1029f5c57375b`, retrieved 2026-11-02, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), 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/cos4890sr-datasheet.pdf)