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ina137ua
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Texas Instruments Special Purpose Amplifiers, SOIC-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
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markdownINA137UA
Texas Instruments · Special Purpose Amplifiers · SOIC-8
INA137UA from Texas Instruments, in a SOIC-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 | Ref | input | Reference terminal for the output. Normally grounded; a voltage applied here is summed with the output signal and can be used to null offset voltage. Source impedance should be less than 10Ω to maintain good common-mode rejection. |
| 2 | -In | input | Inverting differential input. Connects through an internal 12kΩ input resistor to the op amp's inverting node with a 6kΩ feedback resistor. Source impedance must be closely matched to the +In pin to preserve common-mode rejection. |
| 3 | +In | input | Non-inverting differential input. Connects through an internal 12kΩ input resistor to the op amp's non-inverting node with a 6kΩ resistor to Ref. Source impedance must be closely matched to the -In pin to preserve common-mode rejection. |
| 4 | V- | power_in | Negative power supply. Operating range −4V to −18V (±4V to ±18V dual-supply, 8V to 36V total). Decoupling capacitors (e.g. 1µF) should be placed close to this pin. |
| 5 | Sense | input | Sense terminal - feedback point from the output side of the internal 6kΩ feedback resistor. Normally connected to the Output pin; can be used remotely to close the feedback loop at the load or to reconfigure the gain (G=1/2 vs G=2). |
| 6 | Output | output | Op amp output. Delivers Vo = 1/2 (V+In − V−In) in the standard G=1/2 configuration. Output voltage swings to within ~1.8V of V+ and ~1.6V of V−; continuous short-circuit current limit ±60mA; stable driving up to 500pF capacitive load. |
| 7 | V+ | power_in | Positive power supply. Operating range +4V to +18V (±4V to ±18V dual-supply, 8V to 36V total). Decoupling capacitors (e.g. 1µF) should be placed close to this pin. |
| 8 | NC | unconnected | No internal connection. Leave floating or tie to a convenient net; no electrical function. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Op-amp/Cmp |
| Pins | 8 |
Ordering variants
INA137UAINA137UA/2K5INA137UA/2K5G4INA137UAG4INA137UAPAINA137UAINA2137UAINA137UAINA2137UA/2K5INA137UAINA2137UAE4INA137UAINA2137PA
CAD (KiCad official)
- Symbol:
INA137UA - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (None pp, sha256
c57f14b353cad19b, 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).