# COS8552SR

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

COS8552SR from COSINE, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | OUT1 | output | Output of amplifier A. Rail-to-rail output; swings to within ~5mV of each supply rail with RL=100kΩ (15mV with RL=10kΩ). Short-circuit source/sink current ±7mA. |
| 2 | -IN1 | input | Inverting input of amplifier A. Input common-mode voltage may range from -Vs - 0.3V to +Vs + 0.3V. Input bias current ±100pA typ. |
| 3 | +IN1 | input | Non-inverting input of amplifier A. Same voltage range as -IN1 (-Vs - 0.3V to +Vs + 0.3V); rail-to-rail input. |
| 4 | -Vs | power_in | Negative power supply or ground. If not tied to ground, bypass with a 0.1µF capacitor as close to the pin as possible. Total supply (+Vs to -Vs) is 1.8V to 5.5V (abs max 6V). |
| 5 | +IN2 | input | Non-inverting input of amplifier B. Rail-to-rail input; range -Vs - 0.3V to +Vs + 0.3V. |
| 6 | -IN2 | input | Inverting input of amplifier B. Rail-to-rail input; range -Vs - 0.3V to +Vs + 0.3V. |
| 7 | OUT2 | output | Output of amplifier B. Rail-to-rail output; swings to within ~5mV of each supply rail with RL=100kΩ. Short-circuit source/sink current ±7mA. |
| 8 | +Vs | power_in | Positive power supply, 1.8V to 5.5V (abs max 6V between +Vs and -Vs). Place a 0.1µF bypass capacitor as close to the pin as possible, between +Vs and -Vs or between +Vs and ground. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSINE |
| Package | SOP-8 |
| Category | Op-amp/Cmp |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `COS8552SRA`
- `COS8552SR`
- `COS8552SRB`
- `COS8552SRC`
- `COS8552SRD`
- `COS8552MRA`
- `COS8552MRB`
- `COS8552MRC`

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power Supply: +Vs to -Vs |  |  |  | 6 | V |  | 3 |
| Input Voltage |  | -0.5 |  | 0.5 | V | referenced to -Vs and +Vs rails | 3 |
| Input Current |  |  |  | 10 | mA | footnote 2: input terminals diode-clamped to supply rails | 3 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 3 |
| Junction Temperature |  |  |  | 150 | °C |  | 3 |
| Operating Temperature Range |  | -40 |  | 125 | °C |  | 3 |
| ESD Susceptibility, HBM |  |  |  | 2000 | V | HBM | 3 |
| DC Supply Voltage |  | 1.8 |  | 5.5 | V |  | 3 |
| Operating ambient temperature |  | -40 |  | 85 | °C |  | 3 |
| Input Offset Voltage Drift | ΔVOS/ΔT |  | 0.005 | 0.05 | μV/°C | -40°C to 125°C | 4 |
| Input Bias Current | IB | -500 | 100 | 500 | pA |  | 4 |
| Input Offset Current | IOS | -500 | 100 | 500 | pA |  | 4 |
| Common-Mode Voltage Range | VCM | -0.1 |  | 5.6 | V | VS = 5.5V | 4 |
| Common-Mode Rejection Ratio | CMRR | 120 |  |  | dB | VCM =0.1V to 4.9V | 4 |
| Open-Loop Voltage Gain | AOL | 145 |  |  | dB | VO=0.2V to 4.8V | 4 |
| Output Voltage Swing from Rail |  |  |  | 5 | mV | RL=100kΩ | 4 |
| Output Voltage Swing from Rail |  |  |  | 15 | mV | RL=10kΩ | 4 |
| Short-Circuit Current, Sourcing | ISR | 7 |  |  | mA |  | 4 |
| Short-Circuit Current, Sinking | ISK |  |  | -7 | mA |  | 4 |
| Operating Voltage Range |  | 1.8 |  | 5.5 | V |  | 4 |
| Power Supply Rejection Ratio | PSRR | 80 | 100 |  | dB | VS = 1.8V to 5.5V | 4 |
| Quiescent Current / Amplifier | IQ |  | 55 |  | μA | VS = 3.0V | 4 |
| Gain Bandwidth Product | GBWP |  | 1.5 |  | MHz | G=+1 | 4 |
| Slew Rate | SR |  | 0.9 |  | V/μs | G = +1, 2V Output Step | 4 |
| Voltage Noise Density | en |  | 50 |  | nV/√Hz | f=1kHz | 5 |
| Junction-to-ambient Thermal Resistance (SOP8) | RθJA |  | 155 |  | °C/W | SOP8 package | 3 |

## CAD (KiCad official)

- Symbol: `COS8552SR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cos8552sr-etched.step` / `cos8552sr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cos8552sr.step` / `cos8552sr.glb` are the bare package body.

## 3D model downloads

Two STEP files. Same geometry, different body top:

| File | Size | Use it when |
|---|---|---|
| [`cos8552sr.step`](cos8552sr.step) | 122 KB | You want the bare part, or you mark your own boards. |
| [`cos8552sr-etched.step`](cos8552sr-etched.step) | 2.5 MB | You want the part with `COS8552SR` already on it. |

The marking in the etched file is real recessed geometry cut into the solid, not a
texture or a decal: 582 faces against 147 in the bare model. It
survives export, section views, and rendering in any CAD tool, and it drops straight
into KiCad or Fusion with no extra setup.

## Provenance

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

- **Datasheet:** [COSINE datasheet](docs/cos8552sr-datasheet.pdf) (12 pp, sha256 `845c61f20f164396`, retrieved 2026-08-17, tier: lcsc)
- **Extractor:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/cos8552sr-datasheet.pdf)