component
RS8491XK
Public Made by Adomby adom
Jiangsu RUNIC Tech Operational Amplifier, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownRS8491XK
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.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);rs8491xk.step/rs8491xk.glbare 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, 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).