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INA181A2IDBVR - Current-Sense Amplifier

Public Made by Adom

by adom

Texas Instruments Current-Sensing Amplifiers, SOT-23-6. Datasheet-verified pinout, KiCad symbol/footprint/3D.

componentop-amp-cmpina181a2idbvr
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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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Contents

README

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INA181A2IDBVR

Texas Instruments · Current-Sensing Amplifiers · SOT-23-6

INA181A2IDBVR from Texas Instruments, in a SOT-23-6. 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 OUT output Analog output voltage. Vout = (VIN+ - VIN-) x Gain (50 V/V for A2). Drives rail-to-rail within output swing limits from GND to (V+ - 0.05V) typical.
2 GND power_in Ground reference for the device. Connect to system ground.
3 VS power_in Power supply input, 2.7V to 5.5V. Bypass with a 0.1 uF ceramic capacitor to GND placed close to the pin.
4 VIN- input Negative differential input. Connect to the load side of the current-sense shunt resistor. Common-mode range: -0.2V to +26V, independent of supply voltage.
5 VIN+ input Positive differential input. Connect to the supply side of the current-sense shunt resistor. Common-mode range: -0.2V to +26V, independent of supply voltage.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOT-23-6
Category Op-amp/Cmp
Pins 5

Ordering variants

Same part, different packaging or reel option.

  • INA181A2IDBVR
  • INA181A2IDBVT

CAD (KiCad official)

  • Symbol: INA181A2IDBVR
  • Footprint: Package_TO_SOT_SMD:SOT-23-6
  • 3D model: SOT-23-6 (KiCad packages3D, STEP)
  • 3D model files: ina181a2idbvr-etched.step / ina181a2idbvr-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ina181a2idbvr.step / ina181a2idbvr.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
ina181a2idbvr.step 97 KB You want the bare part, or you mark your own boards.
ina181a2idbvr-etched.step 2.0 MB You want the part with INA181A2IDBVR already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 531 faces against 117 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: Texas Instruments datasheet (58 pp, sha256 f6bd362733887a4d, 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).

Datasheet PDF

CAD provenance and independent review

Audit by Codex Astra (AI). Per-file provenance, sources and checks documents the current file hashes, source or generation inputs, modifications, verification limits and unknown origins. AI-created models are identified explicitly; a wiki upload is not manufacturer verification.

Unresolved original provenance: symbol, footprint, step, glb. See the record before treating these as source-verified assets.

Report a component problem with the filename/hash and evidence.

Optional MPN-marked model, preview and provenance

Displayed model and review status

The main 3D viewer uses ina181a2idbvr-hero-mpn.glb, derived from the reviewed ina181a2idbvr-mpn.glb. The exact MPN is AI-added identification artwork, not a factory marking. Marking inputs, fit and licensing and source provenance remain applicable.

The hero applies only a 180-degree Z display rotation; no geometry is scaled. Use the original-frame marked STEP/GLB downloads for board assemblies. The rendered package and readable mark were reviewed; that does not establish manufacturer-exact dimensions, polarity, or native-tool qualification. Binding and file hashes.

Footprint-aware inspection hero

The current hero adds separate nonphysical reference layers: teal dashed copper boundaries at 50% opacity, silkscreen at 30% opacity and actual symbol pin names (unique pad numbers when unnamed) at 50% opacity. Orbit underneath to compare physical terminals, copper and pin1 marks. Copper outlines are not soldermask/paste. Existing MPN, materials, animations and lights are preserved. These helpers are excluded from board-use STEP/GLB files. Geometry, mapping and source hashes; pin-map input. Physical body can occlude seating-plane artwork; inspect the underside or isolate it. Generated display-font contours are not native fab artwork.