Data Sheet
BIPOLAR HALL-EFFECT POSITION SENSORS
AH41
General Description
The AH41 is an integrated Hall-effect latched sensor
designed for electronic commutation of brushless DC
motor applications. The device includes an on-chip
Hall voltage generator for magnetic sensing, a
comparator that amplifiers the Hall voltage, and a
Schmitt to provide switching hysteresis for noise
rejection and open-collector output. An internal
bandgap regulator is used to provide temperature
compensated supply voltage for internal circuits and
allows a wide operating supply range.
A north pole of sufficient strength will turn the output
ON. In the absence of a magnetic field, the output is
OFF.
This IC is available in TO-92S-3 package.
Features
•
•
•
•
•
•
•
On-chip Hall Sensor
Wide Operating Voltage Range: 4V to 24V
Internal Bandgap Regulator for Temperature
Compensation
Maximum Output Sink Current: 50mA
Low Profile TO-92S-3
Operating Temperature: -40˚C to 150˚C
ESD Rating: 2000V (Human Body Model)
300V (Machine Model)
Application
•
Brushless DC Motor
TO-92S-3
Figure 1. Package Type of AH41
Nov 2010
Rev. 1. 2
1
BCD Semiconductor Manufacturing Limited
Data Sheet
BIPOLAR HALL-EFFECT POSITION SENSORS
AH41
Pin Configuration
Z3 Package
(TO-92S-3)
Figure 2. Pin Configuration of AH41 (Front View)
Pin Description
Pin Number
1
2
3
Pin Name
VCC
GND
OUTPUT
Power supply pin
Ground pin
Function
Output pin. It is low during the N magnetic field
Nov 2010
Rev. 1. 2
2
BCD Semiconductor Manufacturing Limited
Data Sheet
BIPOLAR HALL-EFFECT POSITION SENSORS
AH41
Functional Block Diagram
Figure 3. Functional Block Diagram of AH41
Ordering Information
AH41
-
Circuit Type
G1: Green
Magnetic Characteristics
A: 30 to 75 Gauss
B: 5 to 105 Gauss
Package
Z3: TO-92S-3
Package
TO-92S-3
Temperature Range
-40 to 150°C
Part Number
AH41Z3-AG1
AH41Z3-BG1
Marking ID
AH41
AH41
Packing Type
Bulk
Bulk
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Nov 2010
Rev. 1. 2
3
BCD Semiconductor Manufacturing Limited
Data Sheet
BIPOLAR HALL-EFFECT POSITION SENSORS
AH41
Absolute Maximum Ratings (Note 1)
Parameter
Supply Voltage
Output OFF Voltage
Output Sink Current (Continuous Current)
Power Dissipation (T
A
=25°C)
Storage Temperature
Junction Temperature
ESD (Machine Model)
ESD (Human Body Model)
Symbol
V
CC
V
CE
I
OUT
P
D
T
STG
T
J
Value
-24 to 28
Unit
V
V
mA
mW
°C
°C
V
V
30
50
400
-65 to 150
150
300
2000
Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may 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 may affect device reliability.
Recommended Operating Conditions (T
A
=25°C)
Parameter
Supply Voltage
Operating Temperature
Symbol
V
CC
T
OP
Min
4
-40
Max
24
150
Unit
V
°C
Nov 2010
Rev. 1. 2
4
BCD Semiconductor Manufacturing Limited
Data Sheet
BIPOLAR HALL-EFFECT POSITION SENSORS
AH41
Electrical Characteristics
V
CC
=12V, T
A
=25°C, unless otherwise specified.
Parameter
Supply Voltage
Supply Current
Output Leakage Current
Output Saturation Voltage
Rise Time
Fall Time
Symbol
V
CC
I
CC
I
OL
V
SAT
tr
tf
Conditions
V
CC
=4V to 24V
V
CE
=14V
I
OUT
=20mA
R
L
=820Ω
C
L
=20pF
R
L
=820Ω
C
L
=20pF
Min
4
Typ
6
0.1
110
200
100
Max
24
9
10
300
Unit
V
mA
µA
mV
ns
ns
Magnetic Characteristics (T
A
=25°C)
Parameter
Operating Point
Symbol
B
OP
Grade
A
B
A
Min
30
5
-75
-105
80
V
OUT
Typ
Max
75
105
-30
-5
Unit
Gauss
Releasing Point
Hysteresis
B
RP
B
HYS
B
Gauss
Gauss
110
140
High
Turn off
B
HYS
Turn on
V
SAT
N
B
RP
0
Low
B
OP
S
Magnetic Flux Density (Gauss)
Nov 2010
Rev. 1. 2
5
BCD Semiconductor Manufacturing Limited
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