# COS2171SRB

**COSINE** · Operational Amplifier · SOP-8

COS2171SRB 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 | OUT1 | output | Channel 1 output, whose voltage range extends to within millivolts of each supply rail. |
| 2 | -IN1 | input | Channel 1 inverting input, with a voltage range from -Vs -0.3V to +Vs + 0.3V. |
| 3 | +IN1 | input | Channel 1 non-inverting input, with the same voltage range as -IN (-Vs -0.3V to +Vs + 0.3V). |
| 4 | -Vs | power_in | Negative power supply or ground; if it is not connected to ground, bypass it with a 0.1μF capacitor placed as close to the part as possible. |
| 5 | +IN2 | input | Channel 2 non-inverting input, with the same voltage range as -IN (-Vs -0.3V to +Vs + 0.3V). |
| 6 | -IN2 | input | Channel 2 inverting input, with a voltage range from -Vs -0.3V to +Vs + 0.3V. |
| 7 | OUT2 | output | Channel 2 output, whose voltage range extends to within millivolts of each supply rail. |
| 8 | +Vs | power_in | Positive power supply (4.5V to 40V), with a 0.1μF bypass capacitor placed as close to the part as possible. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSINE |
| 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 (grade B) | VOS | -5 | 1 | 5 | mV |  | 4 |
| Input Offset Voltage Drift | ΔVOS/ΔT | -3 | 0.3 | 3 | μV/°C | -40 to 125°C | 4 |
| Input Bias Current | IB | -20 |  | 20 | nA | -40°C to 125°C | 4 |
| Input Offset Current | IOS | -10 |  | 10 | nA | -40°C to 125°C | 4 |
| Common-Mode Voltage Range (limits relative to V-S and V+S as printed) | VCM | -0.1 |  | -2 | V | VS = 40V | 4 |
| Common-Mode Rejection Ratio | CMRR | 60 | 120 |  | dB | V-S -0.1 < VCM < V+S -2 | 4 |
| Open-Loop Voltage Gain | AOL | 70 | 130 |  | dB | VO=0.2V to 4.8V | 4 |
| Output Voltage Swing from Rail |  |  |  | 500 | mV | RL=10kΩ, VS = 40V | 4 |
| Operating Voltage Range |  | 4.5 |  | 40 | V |  | 4 |
| Power Supply Rejection Ratio | PSRR | 75 | 100 |  | dB | VS = +4.5V to +40V | 4 |
| Short-Circuit Current, Sourcing | ISR |  | 40 |  | mA | Sourcing | 4 |
| Short-Circuit Current, Sinking | ISK |  | -48 |  | mA | Sinking | 4 |
| Quiescent Current per Amplifier | IQ |  | 700 |  | μA |  | 4 |
| Input Bias Current (25°C) | IB |  | 10 |  | pA |  | 4 |
| Input Offset Current (25°C) | IOS |  | 4 |  | pA |  | 4 |
| Gain Bandwidth Product | GBWP |  | 5 |  | MHz | G=+1 | 4 |
| Slew Rate | SR |  | 3 |  | V/μs | G=+1 | 4 |
| Voltage Noise Density | en |  | 18 |  | nV/√Hz | f=1kHz | 4 |
| DC Supply Voltage |  | 4.5 |  | 40 | V | Single supply 4.5 to 40 V; dual ±2.25 to ±20 V | 3 |
| Operating Ambient Temperature |  | -40 |  | 125 | °C |  | 3 |
| Power Supply: +Vs to -Vs |  |  |  | 42 | V |  | 3 |
| Input Current |  | -10 |  | 10 | mA | Input signal beyond supply rails by more than 0.5V, current-limited (footnote 2) | 3 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 3 |
| Junction Temperature |  |  |  | 150 | °C |  | 3 |
| Operating Temperature Range |  | -40 |  | 125 | °C |  | 3 |
| Package Thermal Resistance, junction-to-ambient | RθJA |  | 155 |  | °C/W | SOP8 package | 3 |

## CAD (KiCad official)

- Symbol: `COS2171SRB`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cos2171srb-etched.step` / `cos2171srb-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cos2171srb.step` / `cos2171srb.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSINE datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8758019470877175808) (10 pp, sha256 `60b789e21a6df5f6`, retrieved 2026-10-18, 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/cos2171srb-datasheet.pdf)