component
COS128U
Public Made by Adomby adom
COSINE Instrumentation Amplifiers, SOP-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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COS128U
COSINE · Instrumentation Amplifiers · SOP-8
COS128U 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 | RG | passive | Gain-setting pin; for gains greater than 1, a single gain resistor is connected between pin 1 and pin 8 (G = 1 + 50 kΩ/RG for COS128U, 1 + 49.4 kΩ/RG for COS129). |
| 2 | VIN- | power_in | Negative (inverting) differential input; the input common-mode voltage range is -Vs+1.9 V to +Vs-1.2 V. |
| 3 | VIN+ | power_in | Positive (non-inverting) differential input; the input common-mode voltage range is -Vs+1.9 V to +Vs-1.2 V. |
| 4 | -VS | power_in | Negative supply rail; operates from dual supplies of ±2.25 V to ±18 V (or single supply from +4.5 V to +36V with +VS). |
| 5 | REF | input | Reference input that must be driven by a low-impedance source or connected to ground; a series resistance of 8 Ω degrades typical CMR to about 80 dB. |
| 6 | VOUT | output | Output; output swing is +VS-1.1 V (high) to -VS+1.1 V (low) and output current is ±10 mA with VDROPOUT < 1.2 V. |
| 7 | +VS | power_in | Positive supply rail; operates from dual supplies of ±2.25 V to ±18 V (or single supply from +4.5 V to +36V). |
| 8 | RG | passive | Gain-setting pin; the gain resistor RG is connected between pin 8 and pin 1 (internally the pin 1 and pin 8 pair are the two RG terminals). |
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 (COS128U/129U) | VOS | -50 | 10 | 50 | μV | 3 | |
| Input Offset Voltage Drift | ΔVOS/ΔT | 0.2 | 1 | μV/°C | -40 to 125°C | 3 | |
| Input Bias Current | IB | -10 | 2 | 10 | nA | 3 | |
| Input Offset Current | IOS | -10 | 1 | 10 | nA | 3 | |
| Common-Mode Rejection Ratio | CMRR | 125 | dB | G=100 | 3 | ||
| Gain Range | GR | 1 | 10000 | V/V | 4 | ||
| Gain Error | GE | -2 | 2 | % | 4 | ||
| Output Current | IOUT | -10 | 10 | mA | VDROPOUT < 1.2 V | 4 | |
| Short-Circuit Current | ISC | -24 | 24 | mA | 4 | ||
| Operating Voltage Range | 2.25 | 18 | V | 4 | |||
| Power Supply Rejection Ratio | PSRR | 120 | dB | 4 | |||
| Quiescent Current / Amplifier | IQ | 1 | 1.5 | mA | 4 | ||
| Power Supply Voltage (absolute maximum, +Vs to -Vs) | 36 | V | 2 | ||||
| Differential Input Voltage Range | -36 | 36 | V | 2 | |||
| Output Current (absolute maximum) | 50 | mA | 2 | ||||
| Storage Temperature Range | -65 | 150 | °C | 2 | |||
| Junction Temperature | 150 | °C | 2 | ||||
| Operating Temperature Range (absolute maximum) | -40 | 125 | °C | 2 | |||
| ESD Susceptibility, HBM | 2000 | V | HBM | 2 | |||
| DC Supply Voltage (recommended) | 2.5 | 18 | V | 3 | |||
| Operating Ambient Temperature (recommended) | -40 | 125 | °C | 3 | |||
| Gain Bandwidth Product | GBWP | 1.5 | MHz | CL=100pF, RL=10kΩ | 4 | ||
| Slew Rate | SR | 1 | V/μs | CL=100pF, RL=10kΩ, Av=1 | 4 | ||
| Voltage Noise Density | en | 8 | nV/√Hz | f=1kHz | 4 | ||
| Package Thermal Resistance, junction-to-ambient (SOP8) | RθJA | 155 | °C/W | SOP8 | 3 |
CAD (KiCad official)
- Symbol:
COS128U - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
cos128u-etched.step/cos128u-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);cos128u.step/cos128u.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: COSINE datasheet (8 pp, sha256
e35a1a4eec057f26, retrieved 2026-10-18, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).
# COS128U
**COSINE** · Instrumentation Amplifiers · SOP-8
COS128U 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 | RG | passive | Gain-setting pin; for gains greater than 1, a single gain resistor is connected between pin 1 and pin 8 (G = 1 + 50 kΩ/RG for COS128U, 1 + 49.4 kΩ/RG for COS129). |
| 2 | VIN- | power_in | Negative (inverting) differential input; the input common-mode voltage range is -Vs+1.9 V to +Vs-1.2 V. |
| 3 | VIN+ | power_in | Positive (non-inverting) differential input; the input common-mode voltage range is -Vs+1.9 V to +Vs-1.2 V. |
| 4 | -VS | power_in | Negative supply rail; operates from dual supplies of ±2.25 V to ±18 V (or single supply from +4.5 V to +36V with +VS). |
| 5 | REF | input | Reference input that must be driven by a low-impedance source or connected to ground; a series resistance of 8 Ω degrades typical CMR to about 80 dB. |
| 6 | VOUT | output | Output; output swing is +VS-1.1 V (high) to -VS+1.1 V (low) and output current is ±10 mA with VDROPOUT < 1.2 V. |
| 7 | +VS | power_in | Positive supply rail; operates from dual supplies of ±2.25 V to ±18 V (or single supply from +4.5 V to +36V). |
| 8 | RG | passive | Gain-setting pin; the gain resistor RG is connected between pin 8 and pin 1 (internally the pin 1 and pin 8 pair are the two RG terminals). |
## 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 (COS128U/129U) | VOS | -50 | 10 | 50 | μV | | 3 |
| Input Offset Voltage Drift | ΔVOS/ΔT | | 0.2 | 1 | μV/°C | -40 to 125°C | 3 |
| Input Bias Current | IB | -10 | 2 | 10 | nA | | 3 |
| Input Offset Current | IOS | -10 | 1 | 10 | nA | | 3 |
| Common-Mode Rejection Ratio | CMRR | 125 | | | dB | G=100 | 3 |
| Gain Range | GR | 1 | | 10000 | V/V | | 4 |
| Gain Error | GE | -2 | | 2 | % | | 4 |
| Output Current | IOUT | -10 | | 10 | mA | VDROPOUT < 1.2 V | 4 |
| Short-Circuit Current | ISC | -24 | | 24 | mA | | 4 |
| Operating Voltage Range | | 2.25 | | 18 | V | | 4 |
| Power Supply Rejection Ratio | PSRR | 120 | | | dB | | 4 |
| Quiescent Current / Amplifier | IQ | | 1 | 1.5 | mA | | 4 |
| Power Supply Voltage (absolute maximum, +Vs to -Vs) | | | | 36 | V | | 2 |
| Differential Input Voltage Range | | -36 | | 36 | V | | 2 |
| Output Current (absolute maximum) | | | | 50 | mA | | 2 |
| Storage Temperature Range | | -65 | | 150 | °C | | 2 |
| Junction Temperature | | | | 150 | °C | | 2 |
| Operating Temperature Range (absolute maximum) | | -40 | | 125 | °C | | 2 |
| ESD Susceptibility, HBM | | | | 2000 | V | HBM | 2 |
| DC Supply Voltage (recommended) | | 2.5 | | 18 | V | | 3 |
| Operating Ambient Temperature (recommended) | | -40 | | 125 | °C | | 3 |
| Gain Bandwidth Product | GBWP | | 1.5 | | MHz | CL=100pF, RL=10kΩ | 4 |
| Slew Rate | SR | | 1 | | V/μs | CL=100pF, RL=10kΩ, Av=1 | 4 |
| Voltage Noise Density | en | | 8 | | nV/√Hz | f=1kHz | 4 |
| Package Thermal Resistance, junction-to-ambient (SOP8) | RθJA | | 155 | | °C/W | SOP8 | 3 |
## CAD (KiCad official)
- Symbol: `COS128U`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `cos128u-etched.step` / `cos128u-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cos128u.step` / `cos128u.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/8590904278586642432) (8 pp, sha256 `e35a1a4eec057f26`, 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/cos128u-datasheet.pdf)