AH3766Q
Q
HIGH-VOLTAGE, MEDIUM-SENSITIVITY
AUTOMOTIVE HALL- EFFECT LATCH
Description Pin Assignments
The AH3766Q is an AEC-Q100 qualified high-voltage, medium-
sensitivity Hall-Effect latch IC designed for brushless DC-motor
(Top View)
commutation, speed measurement, angular or linear encoders and
position sensors in automotive applications. To support wide range of
3 OUTPUT
demanding applications, the design is optimized to operate over the
GND 2
supply range of 3.0V to 28V. With chopper stabilized architecture and
1 V
DD
an internal bandgap regulator to provide temperature compensated
supply for internal circuits, the AH3766Q provides a reliable solution
over the whole operating range. For robustness and protection, the SOT23
device has a reverse blocking diode with a Zener clamp on the
supply. The output has an overcurrent limit and a Zener clamp.
The single, open-drain output can be switched on with South pole of (Top View)
sufficient strength and switched off with North pole of sufficient
3. OUTPUT
strength. When the magnetic flux density (B) perpendicular to the
2. GND
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
1. V
DD
reverses and becomes lower than the release point (B ).
rp
SIP-3
Applications
Features
Brushless DC-Motor Commutation
Bipolar Latch Operation (South Pole: On, North Pole: off)
Revolution Per Minute (RPM) Measurement
High Sensitivity: B and B of +110G and -110G Typical
op rp
Angular and Linear Encoder and Position Sensing and Indexing
Single, Open-Drain Output with Overcurrent Limit
Flow Meters
3.0V to 28V Operating Voltage Range
Contactless Commutation, Speed Measurement and Angular
Chopper Stabilized Design Provides
Position Sensing/Indexing in Automotive Applications
Superior Temperature Stability
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 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
AH3766Q
Q
Typical Applications Circuit
3.0V to 28V
V
DD
R
L
OUTPUT
AH3766Q
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: 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 13
AH3766Q July 2015
Diodes Incorporated
www.diodes.com
Document number: DS38075 Rev. 2 - 2