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INA125UA
Public Made by Adomby adom
Texas Instruments Instrumentation Amplifiers, SOIC-16. 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
markdownINA125UA
Texas Instruments · Instrumentation Amplifiers · SOIC-16
INA125UA from Texas Instruments, in a SOIC-16. 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 | V+ | power_in | Positive supply; single supply 2.7V to 36V (dual ±1.35V to ±18V), absolute maximum V+ to V- is 36V. |
| 2 | SLEEP | input | Sleep/shutdown control referenced to VREFCOM; logic low (≤100mV) selects sleep mode, VIH is 2.7V to V+, and it should be tied to V+ if unused. |
| 3 | V- | power_in | Negative supply, connected to ground in single-supply operation. |
| 4 | VREFOUT | passive | Voltage reference output, connected to one of VREFBG, VREF2.5, VREF5 or VREF10 to select the reference voltage, and should always be connected to one of them to avoid saturating the reference amplifier. |
| 5 | IAREF | input | Instrumentation amplifier reference terminal to which the output is referred; normally grounded and must be a low impedance connection for good CMR. |
| 6 | VIN- | power_in | Inverting input of the instrumentation amplifier, protected to ±40V. |
| 7 | VIN+ | power_in | Non-inverting input of the instrumentation amplifier, protected to ±40V. |
| 8 | RG | passive | Gain-setting resistor connection; external RG between pins 8 and 9 sets G = 4 + 60kΩ/RG (gain 4 to 10,000). |
| 9 | RG | passive | Gain-setting resistor connection; external RG between pins 8 and 9 sets G = 4 + 60kΩ/RG (gain 4 to 10,000). |
| 10 | VO | output | Instrumentation amplifier output, referred to IAREF, with short-circuit current of -9/+12mA. |
| 11 | Sense | input | Output sense terminal of the instrumentation amplifier, connected to the load/VO for output feedback. |
| 12 | VREFCOM | power_in | Voltage reference common; approximately 180µA flows out of this pin, so it should connect through a low impedance path to sensor common (may be tied to V- with dual supplies). |
| 13 | VREFBG | passive | Bandgap reference voltage pin (1.24V ±0.5%), selected by connecting VREFOUT to it. |
| 14 | VREF2.5 | passive | Selects 2.5V reference output when connected to VREFOUT. |
| 15 | VREF5 | passive | Selects 5V reference output when connected to VREFOUT. |
| 16 | VREF10 | passive | Selects 10V reference output when connected to VREFOUT; V+ must be 1.25V above the reference voltage. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-16 |
| Category | Amplifiers/Comparators |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
INA125UA - Footprint:
Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - 3D model: SOIC-16 (KiCad packages3D, STEP)
- 3D model files:
ina125ua-etched.step/ina125ua-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ina125ua.step/ina125ua.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (19 pp, sha256
1b5f35fb0b06a5ef, retrieved 2026-10-01, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-4-5-20251001(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).