A1250

Part: A1250LLHLX-T — Allegro MicroSystems

Type: Hall-effect sensor IC, bipolar switch

Description: A temperature-stable, stress-resistant bipolar Hall-effect switch with low operating voltage down to 3 V, high sensitivity, and short-circuit protected open-drain output, designed for ring-magnet sensing.

Operating Conditions:

• Supply voltage: 3.0–24 V
• Operating temperature: -40 to 150 °C
• Junction temperature: < 165 °C

Absolute Maximum Ratings:

• Max supply voltage: 28 V
• Max continuous current: Internally limited
• Max junction/storage temperature: 165 °C

Key Specs:

• Supply Voltage (VCC): 3.0 V min, 24 V max
• Output Current Limit (IOM): 30 mA min, 60 mA max (B > BOP)
• Output On Voltage (VOUT(SAT)): 500 mV max (I OUT = 20 mA, B > BOP)
• Supply Current (ICCON/ICCOFF): 4 mA max
• Operate Point (BOP): -10 G min, 25 G max
• Release Point (BRP): -25 G min, 10 G max
• Hysteresis (BHYS): 5 G min, 25 G max
• Chopping Frequency (fc): 160 kHz typ

Features:

• AEC-Q100 automotive qualified
• Quality managed (QM), ISO 26262:2011 compliant
• High-speed 4-phase chopper stabilization
• Low operating voltage down to 3 V
• High sensitivity
• Stable switch points
• Robust EMC

Applications:

• Ring-magnet sensing
• Automotive functional safety systems

Package:

• LH (3-Pin SOT23W)
• UA (3-Pin SIP)

• AEC-Q100 automotive qualified
• Quality managed (QM), ISO 26262:2011 compliant
• High-speed 4-phase chopper stabilization
• Low operating voltage down to 3 V
• High sensitivity
• Stable switch points
• Robust EMC

Package LH

Package UA

ISO 26262:2011, as a Quality Managed (QM) product. The device is classified as a SEooC (Safety Element out of Context) and can be easily integrated into safety-critical systems requiring higher ASIL ratings that incorporate external diagnostics or use measures such as redundancy. Safety documentation will be provided to support and guide the integration process. For further information, contact your local Allegro field applications engineer or sales representative.