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COS128U

Public Made by Adom

by 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.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 (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