AH3724A-SA-7

Hall-effect Latch IC

The AH3724A-SA-7 is a hall-effect latch ic from Diodes Incorporated. View the full AH3724A-SA-7 datasheet below including key specifications, electrical characteristics, absolute maximum ratings.

Manufacturer

Diodes Incorporated

AH3724A-SA-7 Key Specifications

Parameter	Value
Current - Output (Max)	55mA
Supply Current (Max)	5mA
Features	Temperature Compensated
Function	Latch, Bipolar Switch
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 125°C (TA)
Output Type	Push-Pull
Package / Case	TO-236-3, SC-59, SOT-23-3
Polarization	North Pole, South Pole
Sensing Range	6mT Trip, -6mT Release
Supplier Device Package	SOT-23 (Type S)
Diode Technology	Hall Effect
Test Condition	-40°C ~ 125°C
Supply Voltage	3V ~ 28V

AH3724A-SA-7 Overview

Part: AH3722A/AH3724A — Diodes Incorporated

Type: High-Voltage, High-Sensitivity Hall-Effect Latch IC

Description: A high-voltage, high-sensitivity Hall-effect latch IC with internal pullup resistor, designed for commutation of brushless DC motors, flow meters, linear encoders, and position sensors, operating from 3.0V to 28V.

Operating Conditions:

Supply voltage: 3.0 to 28 V
Operating temperature: -40 to +125 °C

Absolute Maximum Ratings:

Max supply voltage: 32 V
Max continuous current: 60 mA
Max junction/storage temperature: +150 °C (Junction), -65 to +165 °C (Storage)

Key Specs:

Output On Voltage: 0.2 V (Typ) at I OUT = 20mA, B > B OP
Supply Current: 3 mA (Typ) at Output open, T A = +25 °C
Internal Pullup Resistance: 14 kΩ (Typ)
Device Startup Time: 10 μs (Typ)
Output Current Limit: 30 mA (Min) to 55 mA (Max)
AH3724A Operation Point (B OP): 40 Gauss (Typ)
AH3724A Release Point (B RP): -40 Gauss (Typ)
ESD HBM: 8 kV

Features:

Bipolar Latch (South Pole: On, North Pole: Off)
3.0V to 28V Operating Voltage Range
High Sensitivity: BOP and BRP of 25G to 40G and -25G to -40G Typical
Internally Pullup Resistor on the Output Pin
Resistant to Physical Stress
Output 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
Halogen and Antimony Free. 'Green' Device

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)

AH3724A-SA-7 Features

Bipolar Latch (South Pole: On, North Pole: Off)
3.0V to 28V Operating Voltage Range
High Sensitivity: BOP and BRP of 25G to 40G and -25G to -40G Typical
Internally Pullup Resistor on the Output Pin
Resistant to Physical Stress
Output 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/

Notes:

No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
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.
Halogen- and Antimony-free "Green' products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.

AH3724A-SA-7 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

AH3724A-SA-7 Pin Configuration

SC59 and SOT23 (Type S)

(Top View)

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

AH3724A-SA-7 Electrical Characteristics

Symbol	Parameter	Conditions	Min	Typ	Max	Unit
V OUT_ON	Output On Voltage	I OUT = 20mA, B > B OP	-	0.2	0.4	V
I OUT_OFF	Output Leakage Current	V OUT = 28V, B < B RP , output off	-	< 0.1	10	μA
I DD	Supply Current	Output open, T A = +25 C	-	3	4	mA
I DD	Supply Current	Output open, T A = -40°C to +125°C	-	-	5	mA
R PU	Internal Pullup Resistance	T A = -40°C to 125°C	10	14	18	kΩ
t ST	Device Startup Time	V DD ≥ 3V, B > B OP or B < B RP (Note 6)	-	10	-	μs
f C	Chopping Frequency	V DD ≥ 3V (Note 8)	-	500	-	kHz
t D	The Time Delay from Magnetic Threshold Reached to the Start of the Output Rise or Fall	(Note 8)	-	4	-	μs
t R	Output Rising Time (External Pullup Resistor R L and Load Capacitance Dependent)	R L = 1kΩ, C L = 20pF (Note 8)	-	0.2	1	μs
t F	Output Falling Time (Internal Switch Resistance and Load Capacitance Dependent)	R L = 1kΩ, C L = 20pF (Note 8)	-	0.1	1	μs
I OCL	Output Current Limit	B > B OP (Note 9)	30	-	55	mA
V Z	Zener Clamp Voltage	I DD = 5mA, T A = +25°C	28	-	-	V

AH3724A-SA-7 Absolute Maximum Ratings

Symbol	Characteristic	Characteristic	Value	Unit
V DD	Supply Voltage (Note 5)	Supply Voltage (Note 5)	32	V
V OUT_MAX	Output Pin Off Voltage (Note 5)	Output Pin Off Voltage (Note 5)	32	V
I OUT	Continuous Output Current	Continuous Output Current	60	mA
I OUT_R	Reverse Output Current	Reverse Output Current	-50	mA
B	Magnetic Flux Density	Magnetic Flux Density	Unlimited	Unlimited
P D	Package Power Dissipation	SIP-3 (Ammo Pack) SIP-3 (Bulk Pack)	550	mW
P D	Package Power Dissipation	SOT23 (Type S)	230	mW
T S	Storage Temperature Range	Storage Temperature Range	-65 to +165	°C
T J	Maximum Junction Temperature	Maximum Junction Temperature	+150	°C
ESD HBM	Electrostatic Discharge Withstand Capability-Human Body Model	Electrostatic Discharge Withstand Capability-Human Body Model	8	kV

AH3724A-SA-7 Recommended Operating Conditions

Symbol	Parameter	Conditions	Rating	Unit
V DD	Supply Voltage	Supply voltage, between V DD and GND pins	3.0 to 28	V
T A	Operating Temperature Range	Operating ambient temperature range	-40 to +125	°C

AH3724A-SA-7 Package Information

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

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part Number	Manufacturer	Package
AH3722A	Diodes Incorporated	—
AH3724A	Diodes Incorporated	—
AH3724A-P-B	Diodes Incorporated	SIP-3
AH3724A-W-7	Diodes Incorporated	TO-236-3, SC-59, SOT-23-3
AH372XA	Diodes Incorporated	—

More datasheets

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