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INA281B3QDBVRQ1

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Texas Instruments Current Sense Amplifiers, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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INA281B3QDBVRQ1

Texas Instruments · Current Sense Amplifiers · SOT-23-5

INA281B3QDBVRQ1 from Texas Instruments, in a SOT-23-5. 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 OUT output Output voltage that swings between GND and VS; with zero sense input the output stays at or below GND + 20 mV, and a differential input of at least 20 mV/gain is needed to keep it in the linear range.
2 GND power_in Ground reference pin for the device.
3 Vs power_in Power supply pin with a recommended operating range of 2.7 V to 20 V (5 V nominal); the output swing is limited by this supply voltage.
4 IN+ input Positive shunt sense input with a recommended common-mode range of -4 V to 110 V (absolute maximum -20 V to 120 V).
5 IN- input Negative shunt sense input with a recommended common-mode range of -4 V to 110 V (absolute maximum -20 V to 120 V); the device is unidirectional, so VSENSE = VIN+ - VIN- should be positive.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-5
Category Amplifiers/Comparators
Pins 5

CAD (KiCad official)

  • Symbol: INA281B3QDBVRQ1
  • Footprint: Package_TO_SOT_SMD:SOT-23-5
  • 3D model: SOT-23-5 (KiCad packages3D, STEP)
  • 3D model files: ina281b3qdbvrq1-etched.step / ina281b3qdbvrq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ina281b3qdbvrq1.step / ina281b3qdbvrq1.glb are the bare package body.

Provenance

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

  • Datasheet: Texas Instruments datasheet (25 pp, sha256 949a18f2e6fc9deb, retrieved 2026-10-10, tier: lcsc)
  • Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
  • 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