AH3764Q
Q
HIGH-VOLTAGE, HIGH-SENSITIVITY
AUTOMOTIVE HALL-EFFECT LATCH
Description Pin Assignments
The AH3764Q is an AEC-Q100 qualified high-voltage, high-sensitivity
Hall-Effect latch IC designed for brushless DC-motor commutation,
(Top View)
speed measurement, angular or linear encoders and position sensors
in automotive applications. To support a wide range of demanding
applications, the design is optimized to operate over the supply range 3 OUTPUT
of 3.0V to 28V. With chopper stabilized architecture and an internal GND 2
bandgap regulator to provide temperature compensated supply for 1 V
DD
internal circuits, the AH3764Q provides a reliable solution over the
whole operating range. For robustness and protection, the device has
SC59 and SOT23
a reverse blocking diode with a Zener clamp on the supply. The
output has an over current limit and a Zener clamp.
The single, open-drain output can be switched on with South pole of
sufficient strength and switched off with North pole of sufficient
strength. When the magnetic flux density (B) perpendicular to the
(Top View)
package is larger than the operate point (B ) the output is switched
op
on (pulled low). The output is held latched until magnetic flux density
3. OUTPUT
reverses and becomes lower than the release point (B ).
rp
2. GND
V
1.
DD
The magnetic operating and release polarity is opposite for SOT23
and SC59 packages. SOT23 and SIP-3 packages will require south
SIP-3
pole to the part marking side to operate while SC59 will require south
pole to the non-part marking side.
Features
Applications
Bipolar Latch Operation (South Pole: On, North Pole: off) Brushless DC-Motor Commutation
High Sensitivity: B and B of +40G and -40G Typical Revolution Per Minute (RPM) Measurement
op rp
Single Open-Drain Output with Overcurrent Limit Angular and Linear Encoder and Position Sensing and Indexing
3.0V to 28V Operating Voltage Range Flow Meters
Chopper Stabilized Design Provides Contactless Commutation, Speed Measurement and Angular
Superior Temperature Stability Position Sensing/Indexing in Automotive Applications
Minimal Switch Point Drift
Enhanced Immunity to Stress
Good RF Noise Immunity
Reverse Blocking Diode
Zener Clamp on Supply and Output Pins
-40C to +150C Operating Temperature
ESD: HBM 8kV, CDM: >2kV
AEC-Q100 Grade 0 Qualified
Industry Standard SC59, SOT23 and SIP-3 Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. Green Device (Note 3)
Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See Low-Pass Filter
Sample and
Hold
Dynamic Offset
Cancellation
AH3764Q
Q
Typical Applications Circuit
3.0V to 28V
V
DD
R
L
OUTPUT
AH3764Q
C
IN
GND
Note: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF. R is the pull-up resistor.
IN L
Pin Descriptions
Package: SC59, SOT23 and SIP-3
Pin Number Pin Name Function
1 V Power Supply Input
DD
2 GND Ground
3 OUTPUT Output Pin
Functional Block Diagram
V
DD
Power
switch
To All Subcircuits
OUTPUT
Amp Amp
Control
Current
Limit
GND
2 of 15
AH3764Q July 2015
Diodes Incorporated
www.diodes.com
Document number: DS38073 Rev. 2 - 2
PRELIMINARY - CONFIDENTIAL