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RS8491XK

Public Made by Adom

by adom

Jiangsu RUNIC Tech Operational Amplifier, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentoperational amplifier-comparatorrs8491xkfactory-2.0.0extractor-text
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RS8491XK

Jiangsu RUNIC Tech · Operational Amplifier · SOIC-8

RS8491XK from Jiangsu RUNIC Tech, in a SOIC-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 +IN input Noninverting input of the amplifier, which also drives the internal guard buffer input.
2 GRD passive Guard pin that is part of the integrated guard buffer and is used to route the guard ring around the sensitive inputs.
3 IC passive Internal connection that must be connected to V- or left unconnected.
4 V- power_in Negative supply voltage.
5 V+ power_in Positive supply voltage.
6 OUT output Amplifier output, which has a rail-to-rail output stage.
7 GRD passive Guard pin that is part of the integrated guard buffer and is used to route the guard ring around the sensitive inputs.
8 -IN input Inverting input of the amplifier.

Key specifications

Parameter Value
Manufacturer Jiangsu RUNIC Tech
Package SOIC-8
Category Operational Amplifier/Comparator
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 Bias Current IB -200 50 200 fA 25°C, VS=5V 7
Input Offset Current IOS -200 50 200 fA 25°C, VS=5V 7
Input Offset Voltage VOS -400 54 400 μV VCM=VS/2, 25°C, VS=5V 7
Input Offset Voltage VOS -1000 1000 μV VCM=1.5V to 3V, -40°C to 85°C, VS=5V 7
Input Offset Voltage VOS -600 600 μV VCM=0V to 3V, 25°C, VS=5V 7
Input Offset Voltage Average Drift VOS TC -5 5 μV/°C VCM=1.5V to 3V, -40°C to 85°C, VS=5V 7
Power-Supply Rejection Ratio PSRR 83 106 dB VS=5V to 25V, 25°C 7
Power-Supply Rejection Ratio PSRR 70 dB VS=5V to 25V, -40°C to 125°C 7
Common-Mode Voltage Range VCM 0 3 V VS=5V, -40°C to 125°C 7
Common-Mode Rejection Ratio CMRR 83 102 dB VCM=1.5V to 3.0V, 25°C, VS=5V 7
Common-Mode Rejection Ratio CMRR 70 dB VCM=1.5V to 3.0V, -40°C to 125°C, VS=5V 7
Open-Loop Voltage Gain AOL 110 130 dB RL=10kΩ to VCM, VOUT=0.2V to 4.3V, 25°C, VS=5V 7
Open-Loop Voltage Gain AOL 105 dB RL=10kΩ to VCM, VOUT=0.2V to 4.3V, -40°C to 125°C, VS=5V 7
Input Resistance RIN 20 TΩ 7
Output Voltage High VOH 4.92 V RL=2kΩ, 25°C, VS=5V 8
Output Voltage High VOH 4.85 V RL=2kΩ, -40°C to 125°C, VS=5V 8
Output Voltage High VOH 4.98 V RL=10kΩ, 25°C, VS=5V 8
Output Voltage High VOH 4.95 V RL=10kΩ, -40°C to 125°C, VS=5V 8
Output Voltage Low VOL 133 mV RL=2kΩ, 25°C, VS=5V 8
Output Voltage Low VOL 160 mV RL=2kΩ, -40°C to 125°C, VS=5V 8
Output Voltage Low VOL 29 mV RL=10kΩ, 25°C, VS=5V 8
Output Voltage Low VOL 40 mV RL=10kΩ, -40°C to 125°C, VS=5V 8
Output Source Current ISOURCE 30 mA 25°C, VS=5V 8
Output Sink Current ISINK -20 mA 25°C, VS=5V 8
Quiescent Current Per Amplifier IQ 1 1.6 mA IOUT=0A, 25°C, VS=5V 8
Quiescent Current Per Amplifier IQ 1.8 mA IOUT=0A, -40°C to 125°C, VS=5V 8
Guard Offset Voltage VGOS -400 75 400 μV VCM=1.5V to 3V, 25°C, VS=5V 8
Guard Offset Voltage VGOS -800 800 μV VCM=1.5V to 3V, -40°C to 125°C, VS=5V 8
Guard Offset Voltage VGOS -500 500 μV VCM=0.1V to 3V, 25°C, VS=5V 8
Output Voltage Range 0.1 3 V VGOS<±500μV, 25°C, VS=5V 8
Supply voltage VS 5 25 V Single-supply 6
Supply voltage VS 2.5 12.5 V Dual-supply, printed as ±2.5 to ±12.5 6
Supply voltage VS -0.7 28 V VS=(V+)-(V-) 6
Signal input pin current -10 10 mA Signal input pin 6
Signal output pin current -10 10 mA Signal output pin 6
Operating temperature range TA -40 125 °C Free-air 6
Junction temperature TJ -40 150 °C 6
Storage temperature Tstg -65 150 °C 6
Package thermal impedance θJA 110 °C/W SOIC-8(SOP8) 6
Input Offset Voltage VOS -900 100 900 μV VCM=VS/2, 25°C, VS=25V 9
Input Offset Voltage VOS -2000 2000 μV VCM=1.5V to 21V, -40°C to 85°C, VS=25V 9
Input Offset Voltage Average Drift VOS TC -3.5 3.5 μV/°C VCM=1.5V to 23V, -40°C to 85°C, VS=25V 9
Common-Mode Voltage Range VCM 0 23 V VS=25V, -40°C to 125°C 9
Common-Mode Rejection Ratio CMRR 95 120 dB VCM=1.5V to 21V, 25°C, VS=25V 9
Common-Mode Rejection Ratio CMRR 90 dB VCM=1.5V to 21V, -40°C to 125°C, VS=25V 9
Common-Mode Rejection Ratio CMRR 80 85 dB VCM=0 to 23V, 25°C, VS=25V 9
Open-Loop Voltage Gain AOL 110 130 dB RL=10kΩ, VOUT=0.5V to 24.5V, 25°C, VS=25V 9
Open-Loop Voltage Gain AOL 105 dB RL=10kΩ, VOUT=0.5V to 24.5V, -40°C to 125°C, VS=25V 9
Output Voltage High VOH 24.62 V RL=2kΩ, 25°C, VS=25V 10
Output Voltage High VOH 24.5 V RL=2kΩ, -40°C to 125°C, VS=25V 10
Output Voltage Low VOL 0.61 V RL=2kΩ, 25°C, VS=25V 10
Output Voltage Low VOL 0.75 V RL=2kΩ, -40°C to 125°C, VS=25V 10
Output Voltage Low VOL 0.13 0.2 V RL=10kΩ, 25°C, VS=25V 10
Output Voltage Low VOL 0.22 V RL=10kΩ, -40°C to 125°C, VS=25V 10
Output Source Current ISOURCE 70 mA 25°C, VS=25V 10
Output Sink Current ISINK -50 mA 25°C, VS=25V 10
Guard Offset Voltage VGOS -400 80 400 μV VCM=1.5V to 23V, 25°C, VS=25V 10
Guard Offset Voltage VGOS -1000 1000 μV VCM=1.5V to 23V, -40°C to 125°C, VS=25V 10
Output Voltage Range 0.1 23.5 V VGOS<±500μV, 25°C, VS=25V 10

CAD (KiCad official)

  • Symbol: RS8491XK
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: rs8491xk-etched.step / rs8491xk-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rs8491xk.step / rs8491xk.glb are the bare package body.

Provenance

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

  • Datasheet: Jiangsu RUNIC Tech datasheet (19 pp, sha256 25ff542b30d2bfbe, retrieved 2026-10-28, 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