Product Overview
The A1126 is an omnipolar, ultrasensitive Hall-effect switch with a digital output, designed for operation up to 24V and extended temperature ranges up to 150C. It features dynamic offset cancellation for superior high-temperature performance, making it insensitive to physical stress and temperature excursions. The device integrates a voltage regulator, Hall-voltage generator, amplifier, chopper stabilization, Schmitt trigger, and a short-circuit-protected open-drain output. Its omnipolar operation allows activation by either north or south magnetic polarity, simplifying manufacturing by eliminating the need for precise magnet orientation. This makes it an excellent replacement for reed switches in industrial, consumer, and automotive applications.
Product Attributes
- Brand: Allegro MicroSystems
- Certifications: AEC-Q100 automotive qualified
- Material: Advanced BiCMOS wafer fabrication processing
- Lead Finish: 100% matte-tin-plated leadframe
- Environmental: Lead (Pb) free
Technical Specifications
| Characteristic | Symbol | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Supply Voltage (Operating) | VCC | TJ < 165C | 3 | 24 | V | |
| Output Leakage Current | IOUTOFF | VOUT = 24 V, B < BRPS | 10 | A | ||
| Output On Voltage | VOUT(SAT) | IOUT = 20 mA, B > BOP | 185 | 500 | mV | |
| Output Current Limit | IOM | B > BOP | 30 | 60 | mA | |
| Power-On Time | tPO | 25 | s | |||
| Chopping Frequency | fC | 800 | kHz | |||
| Output Rise Time | tr | RLOAD = 820 , CS = 20 pF | 0.2 | 2 | s | |
| Output Fall Time | tf | RLOAD = 820 , CS = 20 pF | 0.1 | 2 | s | |
| Supply Current (On) | ICC(ON) | B > BOP , VCC = 12 V | 4 | mA | ||
| Supply Current (Off) | ICC(OFF) | B < BRP , VCC = 12 V | 4 | mA | ||
| Supply Zener Clamp Voltage | VZ | ICC = 6.5 mA; TA = 25C | 28 | V | ||
| Supply Zener Current | IZSUPPLY | VS = 28 V | 6.5 | mA | ||
| Operate Point (South Pole) | BOPS | South pole adjacent to branded face | 15 | 38 | 55 | G |
| Operate Point (North Pole) | BOPN | North pole adjacent to branded face | 55 | 38 | 15 | G |
| Release Point (South Pole) | BRPS | South pole adjacent to branded face | 5 | 20 | 50 | G |
| Release Point (North Pole) | BRPN | North pole adjacent to branded face | 50 | 20 | 5 | G |
| Hysteresis | BHYS | | BOPS BRPS |, | BOPN BRPN | | 5 | 30 | G |
2410010303_ALLEGRO-A1126LUA-T_C146385.pdf
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