component

COS128UA

Public Made by Adom

by adom

COSINE Instrumentation OpAmps, SOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

componentop-amp-cmpcos128ua
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Generated by kicad-footprint-generator · KiCad file format 20260206
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docs cos128ua: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers cos128ua: viewers · Ray
cos128ua-etched.fit.json cos128ua: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
cos128ua-etched.glb cos128ua: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC body wi… · Ray
cos128ua-etched.step cos128ua: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC body wi… · Ray
cos128ua.glb Publish 0.1.0 · Ray
cos128ua.kicad_mod Publish 0.1.0 · Ray
cos128ua.kicad_sym cos128ua: factory component page (tier=lcsc) · Ray
cos128ua.lbr cos128ua: factory component page (tier=lcsc) · Ray
cos128ua.step Publish 0.1.0 · Ray
package.json Publish 0.1.0 · Ray
page.json cos128ua: white body in tscircuit (pre-1.8 etch structure under an assembly instance); Ray 2026-10-19: black IC body wi… · Ray
README.md cos128ua: specified limits as data (metadata.characteristics, 25 rows from the datasheet) · Ray

COS128UA

COSINE · Instrumentation OpAmps · SOP-8

COS128UA 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 RG passive Gain setting pin. Connect an external gain resistor RG between pin 1 and pin 8 to set voltage gain G = 1 + 50kΩ/RG (COS128). Leave open (NC) for unity gain.
2 VIN- input Inverting (negative) analog input to the instrumentation amplifier. Diode-clamped to the supply rails; input signals exceeding rails by >0.5V should be current-limited to ≤10mA. Bias current ±2nA typ.
3 VIN+ input Non-inverting (positive) analog input to the instrumentation amplifier. Diode-clamped to supply rails; input signals exceeding rails by >0.5V should be current-limited to ≤10mA. Bias current ±2nA typ.
4 -VS power_in Negative power supply pin. Operating range ±2.25V to ±18V (dual supply) or ground for single-supply operation. Bypass to ground with a 0.1µF ceramic capacitor close to the pin.
5 REF input Reference input pin. Sets the DC offset of the output; must be driven by a low-impedance source or tied to ground. Series resistance as small as 8Ω degrades CMR to ~80dB.
6 VOUT output Amplifier output. Swings to within 1.1V of each supply rail with ±10mA typical load current; short-circuit current ±24mA. Output = G × (VIN+ − VIN−) + VREF.
7 +VS power_in Positive power supply pin. Operating range ±2.25V to ±18V dual, or +4.5V to +36V single supply. Bypass with a 0.1µF ceramic capacitor close to the pin; 2.2µF tantalum optional for better performance. Quiescent current 1.0mA typ.
8 RG passive Gain setting pin. Connect an external gain resistor RG between pin 1 and pin 8 to set voltage gain G = 1 + 50kΩ/RG (COS128). Leave open (NC) for unity gain.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

  • COS128UAU
  • COS128UA
  • COS128UAC
  • COS128UAP
  • COS128UAPA

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 VOS -125 25 125 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
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
Power Supply Voltage (absolute max, +Vs to -Vs) 36 V 2
Differential Input Voltage Range -36 36 V 2
Output Current 50 mA 2
Storage Temperature Range -65 150 °C 2
Junction Temperature 150 °C 2
Operating Temperature Range -40 125 °C 2
ESD Susceptibility, HBM 2000 V 2
DC Supply Voltage 2.5 18 V 3
Operating ambient temperature -40 125 °C 3
Package Thermal Resistance, junction-to-ambient (SOP8) RθJA 155 °C/W SOP8 package 3

CAD (KiCad official)

  • Symbol: COS128UA
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOP-8 (KiCad packages3D, STEP)
  • 3D model files: cos128ua-etched.step / cos128ua-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); cos128ua.step / cos128ua.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 2026-08-17, 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