AH3722

Part: AH372X — Diodes Incorporated

Type: High-voltage, high-sensitivity Hall-effect latch IC

Description: High-voltage, high-sensitivity Hall-effect latch IC designed for brushless DC-motor commutation, speed measurement, angular or linear encoders and position sensors, operating from 3.0V to 28V with a single open-drain output.

Operating Conditions:

• Supply voltage: 3.0 to 28 V
• Operating temperature: -40 to +125 °C
• Operation Point (BOP): 10 to 170 Gauss
• Release Point (BRP): -170 to -10 Gauss

Absolute Maximum Ratings:

• Max supply voltage: 32 V
• Max continuous current: 60 mA
• Max junction temperature: +150 °C
• Max storage temperature: -65 to +165 °C

Key Specs:

• Output On Voltage (V OUT_ON): 0.2 V (typ), 0.4 V (max) at I OUT = 20mA, B > B OP
• Output Leakage Current (I OUT_OFF): < 0.1 μA (typ), 10 μA (max) at V OUT = 28V, B < B RP
• Supply Current (I DD): 3 mA (typ), 5 mA (max) at output open, T A = -40°C to +125°C
• Device Startup Time (t ST): 10 μs (typ) at V DD ≥ 3V, B > B OP
• Output Current Limit (I OCL): 30 mA (min), 55 mA (max) at B > B OP
• Chopping Frequency (f C): 500 kHz (typ) at V DD ≥ 3V
• AH3722 Operation Point (B OP): 25 Gauss (typ)
• AH3722 Release Point (B RP): -25 Gauss (typ)

Features:

• Bipolar Latch (South Pole: On, North Pole: Off)
• 3.0V to 28V Operating Voltage Range
• High Sensitivity: BOP and BRP of 25G to 140G and -25G to -140G (typ)
• Single Open-Drain Output with Overcurrent Limit
• Chopper Stabilized Design Provides Superior Temperature Stability, Minimal Switch Point Drift, Enhanced Immunity to Stress, Good RF Noise Immunity
• Reverse Blocking Diode and Zener Clamp on Supply
• -40 °C to +125°C Operating Temperature
• High ESD HBM: 8kV

Applications:

• Brushless DC motor commutation
• Revolution per minute (RPM) measurement
• Flow meters
• Angular and linear encoders and position sensors
• Contactless commutation, speed measurement and angular position sensing/indexing in consumer home appliances, office equipment and industrial applications

Package:

• SC59
• SOT23 (Type S)
• SIP-3 (Ammo Pack)
• SIP-3 (Bulk Pack)

• Bipolar Latch (South Pole: On, North Pole: Off)
• 3.0V to 28V Operating Voltage Range
• High Sensitivity: BOP and BRP of 25G to 140G and -25G to -140G (typ)
• Single Open-Drain Output with Overcurrent Limit
• Chopper Stabilized Design Provides
• Superior Temperature Stability
• Minimal Switch Point Drift
• Enhanced Immunity to Stress
• Good RF Noise Immunity
• Reverse Blocking Diode and Zener Clamp on Supply
• -40 C to +125°C Operating Temperature
• High ESD HBM: 8kV
• Industry Standard SC59, SOT23 (Type S), SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack) Packages
• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
• Halogen and Antimony Free. 'Green' Device (Note 3 )
• For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated's definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green' products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.

AH372X

HIGH-VOLTAGE HALL-EFFECT LATCH

• Brushless DC motor commutation
• Revolution per minute (RPM) measurement
• Flow meters
• Angular and linear encoders and position sensors
• Contactless commutation, speed measurement and angular position sensing/indexing in consumer home appliances, office equipment and industrial applications

SC59 and SOT23 (Type S)

SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack)

1. When power is initially turned on, VDD must be within its correct operating range (3.0V to 28V) to guarantee the output sampling. The output state is valid after the startup time of 10μs typical from the operating voltage reaching 3V.

2. Typical values are defined at TA = +25 C, VDD = 12V. Maximum and minimum values over the operating temperature range is not tested in production but guaranteed by design, process control and characterization.

3. Guaranteed by design, process control, and characterization. Not tested in production.

4. The device limits the output current IOUT to current limit of IOCL.

AH372X

AH372X

1. Stresses greater than those listed under Absolute Maximum Ratings can cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to Absolute Maximum Ratings for extended periods can affect device reliability.

2. The absolute maximum VDD of 32V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate the device at the absolute maximum-rated conditions for any period of time.

Note: 4. CIN is for power stabilization and to strengthen the noise immunity. The recommended capacitance is 10nF to 100nF. RL is the pullup resistor.

Please see http://www.diodes.com/package-outlines.html for the latest version.