component
A1302
Public Made by Adomby adom
Allegro ratiometric linear Hall-effect sensor, SOT-23W. Analog output, 1.3 mV/G, 4.5-6 V. Datasheet-verified.
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
markdownA1302
Allegro MicroSystems · Hall-effect sensor · SOT-23W
Outputs an analog voltage proportional to the magnetic field through its face, centered at half the supply and swinging up for one pole and down for the other. Sensitivity is about 1.3 mV per gauss, and because the output is ratiometric to VCC it tracks the supply so an ADC on the same rail reads field directly. It runs from 4.5 to 6 V in a three-lead SOT-23W. A simple analog sensor for position, current (via a magnet), and proximity.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VCC | power_in | Supply pin. Connects power supply to chip. Operating range 4.5 to 6.0 V; absolute max 8 V. Typical supply current up to 11 mA. Bypass with CBYPASS capacitor to GND. |
| 2 | VOUT | output | Analog output from Hall-effect sensor. Ratiometric rail-to-rail; quiescent output = VCC/2 (2.5 V typical at VCC = 5 V). Sensitivity 1.3 mV/G typical (A1302). Output resistance ~2 ohm, max sink current 10 mA. |
| 3 | GND | power_in | Ground reference for supply and output. |
Key specifications
| Parameter | Value |
|---|---|
| Type | Ratiometric linear Hall-effect sensor |
| Output | Analog, ratiometric to VCC |
| Sensitivity | 1.3 mV/G (typ) |
| Quiescent output | VCC/2 (no field) |
| Supply | 4.5-6 V |
| Bandwidth | 20 kHz |
| Package | SOT-23W (3-lead) |
Ordering variants
A1302KUA-T (SIP-3, UA)A1302KLHLX-T (SOT-23W)
CAD (KiCad official)
- Symbol:
Sensor_Magnetic:A1302xLH (KiCad official) - Footprint:
Package_TO_SOT_SMD:SOT-23W - 3D model: SOT-23W (KiCad packages3D, STEP)
- 3D model files:
a1302-etched.step/a1302-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);a1302.step/a1302.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Allegro MicroSystems datasheet (10 pp, sha256
65c35521e270ff28, retrieved 2026-08-17, tier: manufacturer) - 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).