component
OPA131UA
Public Made by Adomby adom
Texas Instruments 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
markdownOPA131UA
Texas Instruments · Operational Amplifier · SOIC-8
OPA131UA from Texas Instruments, 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 | Offset Trim | passive | Offset voltage trim connection, used with a 100kΩ potentiometer to V+ (wiper) for a ±20mV typ trim range to null the op amp's own offset. |
| 2 | -In | input | Inverting input of the FET-input op amp, with input bias current of 50pA max and input voltage limited to (V-) - 0.7V to (V+) + 0.7V. |
| 3 | +In | input | Non-inverting input of the FET-input op amp, with common-mode range of (V-) + 3V to (V+) - 1V typ and input voltage limited to (V-) - 0.7V to (V+) + 0.7V. |
| 4 | V- | power_in | Negative supply, with total supply (V+ to V-) of ±4.5V to ±18V operating and 36V absolute maximum, bypassed with 10nF ceramic or larger. |
| 5 | Offset Trim | passive | Offset voltage trim connection, used with a 100kΩ potentiometer to V+ (wiper) for a ±20mV typ trim range to null the op amp's own offset. |
| 6 | Output | output | Op amp output with short-circuit current of ±25mA and swing to within 2.5V typ of either supply at RL = 2kΩ; short-circuit to ground is continuous. |
| 7 | V+ | power_in | Positive supply, with total supply (V+ to V-) of ±4.5V to ±18V operating and 36V absolute maximum, bypassed with 10nF ceramic or larger. |
| 8 | NC | unconnected | No connection. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| 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 Offset Voltage | VOS | -1 | 0.2 | 1 | mV | 3 | |
| Input Offset Voltage Drift | 2 | 10 | µV/°C | Operating Temperature Range | 3 | ||
| Power Supply Rejection | 50 | 200 | µV/V | VS = ±4.5V to ±18V | 3 | ||
| Input Bias Current | IB | -50 | 5 | 50 | pA | VCM = 0V | 3 |
| Input Offset Current | IOS | -50 | 1 | 50 | pA | VCM = 0V | 3 |
| Common-Mode Rejection | CMR | 70 | 80 | dB | VCM = -12V to +14V | 3 | |
| Open-Loop Voltage Gain | AOL | 94 | 110 | dB | VO = -12V to +12V | 3 | |
| Voltage Noise Density | 21 | nV/√Hz | f = 10Hz | 3 | |||
| Voltage Noise Density | 16 | nV/√Hz | f = 100Hz | 3 | |||
| Voltage Noise Density | 15 | nV/√Hz | f = 1kHz | 3 | |||
| Current Noise Density | 3 | fA/√Hz | f = 1kHz | 3 | |||
| Gain-Bandwidth Product | GBW | 4 | MHz | 3 | |||
| Slew Rate | SR | 10 | V/µs | 3 | |||
| Settling Time 0.1% | 1.5 | µs | G = -1, 10V Step, CL = 100pF | 3 | |||
| Settling Time 0.01% | 2 | µs | G = -1, 10V Step, CL = 100pF | 3 | |||
| Total Harmonic Distortion + Noise | THD+N | 0.0008 | % | 1kHz, G = 1, VO = 3.5Vrms | 3 | ||
| Short-Circuit Current | ISC | 25 | mA | 3 | |||
| Specified Operating Voltage | VS | 15 | V | 3 | |||
| Operating Voltage Range | VS | 4.5 | 18 | V | printed as ±4.5 to ±18 | 3 | |
| Quiescent Current (per amplifier) | IQ | 1.5 | 1.75 | mA | IO = 0 | 3 | |
| Operating Temperature Range | -55 | 125 | °C | 3 | |||
| Storage Temperature Range | -55 | 125 | °C | 3 | |||
| Thermal Resistance, θJA | θJA | 150 | °C/W | SO-8 | 3 | ||
| Supply Voltage, V+ to V- | 36 | V | 2 | ||||
| Operating Temperature | -55 | 125 | °C | 2 | |||
| Storage Temperature | -55 | 125 | °C | 2 | |||
| Junction Temperature | TJ | 150 | °C | 2 | |||
| Lead Temperature | 300 | °C | soldering, 10s | 2 |
CAD (KiCad official)
- Symbol:
OPA131UA - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
opa131ua-etched.step/opa131ua-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);opa131ua.step/opa131ua.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (23 pp, sha256
acdc9774057d2a2e, retrieved 2026-10-27, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-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).