Page 1
AH920
Document number: DS36768 Rev. 2 - 2
1 of 13
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December 2013
© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
Description
The AH920 is a Hall-effect latch designed in mixed signal CMOS
technology. It is quite suitable for use in automotive, industrial and
consumer applications.
Superior high-temperature performance is made possible through
dynamic offset cancellation, which reduces the residual offset voltage
normally caused by device over-molding, temperature dependencies,
and thermal stress. The device integrates a voltage regulator, Hallvoltage generator, small-signal amplifier, chopper stabilization, schmitt
trigger, and open-drain output.
An on-board regulator permits operation with supply voltage from
3.5V to 20V.
The AH920 is available in TO-92S-3 and SOT-23-3 packages, which
are optimized for most applications.
Features
Wide Operating Voltage Range from 3.5V to 20V
Symmetrical Switch Points
Chopper-stabilized Amplifier Stage
Superior Temperature Stability
Open-drain Output
Compact Size
ESD Rating: 6000V (Human Body Model)
Pin Assignments
(Front View)
1
2
3
OUT
GND
VCC
TO-92S-3 (Z3 Package)
(Top View)
3
21
OUT
GND
VCC
SOT-23-3 (N Package)
Applications
Brushless DC Motor Commutation
Brushless DC Fan
Solid-state Switch
Revolution Counting
Speed Detection
High Sensitivity and Unconnected Switch
AH920
VCC GND OUT
C
L
0.1mF
R
L
Output
V
CC1
V
CC2
AH920
GND
OUT
VCC
Output
R
L
C
L
0.1mF
V
CC
HIGH SENSITIVITY CMOS HALL-EFFECT LATCH
Typical Applications Circuit
Page 2
AH920
Document number: DS36768 Rev. 2 - 2
2 of 13
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December 2013
© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
Pin Number
Pin Name
Function
TO-92S-3
SOT-23-3
1
1
VCC
Supply voltage 2 3
GND
Ground pin 3 2
OUT
Output Pin
Hall Sense
Chopper
Switch
Reference Voltage
AMP
VCC
1 (1)
OUT
3 (2)
2 (3)
GND
A (B)
A for TO-92S-3
B for SOT-23-3
Pin Descriptions
Functional Block Diagram
Page 3
AH920
Document number: DS36768 Rev. 2 - 2
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December 2013
© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
Symbol
Parameter
Value
Unit
VCC
Supply Voltage
20
V
ICC
Supply Current (Fault)
5
mA
I
OUT
Output Current (Continuous)
25
mA
PD
Power Dissipation
TO-92S-3
400
mW
SOT-23-3
230
TA
Operation Temperature
-50 to +150
ºC
T
STG
Storage Temperature
-65 to +150
ºC
TJ (Max)
Maximum Junction Temperature
+165
ºC
ESD
ESD (Human Body Model)
6000
V
Symbol
Parameter
Min
Max
Unit
V
CC
Supply Voltage
3.5
20 V TA
Operating Ambient Temperature
-40
+125
ºC
Absolute Maximum Ratings (Note 1)
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 Ope rating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.
Recommended Operating Conditions
Page 4
AH920
Document number: DS36768 Rev. 2 - 2
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December 2013
© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
VCC
Supply Voltage
Operating
3.5
12
20
V
ICC
Supply Current
VCC=12V, B<BRP
3.0
5.0
mA
VCC=12V, B>BOP
3.0
5.0
mA
V
SAT
Saturation Voltage
I
OUT
=20mA, B>BOP
185
500
mV
I
LEAKAGE
Output Leakage Current
V
OUT
=20V, B<BRP
0.1
10
μA
t
RISING
Output Rising Time
RL=1kΩ,CL=20pF
0.4 2 μs
t
FALLING
Output Falling Time
RL=1kΩ,CL=20pF
0.4 2 μs
Symbol
Parameter
Min
Typ
Max
Unit
BOP
Operating Point
5
22
40
Gauss
BRP
Releasing Point
-40
-22
-5
Gauss
B
HYS
Hysteresis 45
Gauss
V
OUT
V
CC
V
d
High
Low
B
HYS
B
RP
B
OP
V
SAT
0N S
For TO-92S-3
V
OUT
V
CC
V
d
High
Low
B
HYS
B
RP
B
OP
V
SAT
0N S
For SOT-23-3
Electrical Characteristics (@V
Magnetic Characteristics (@V
=12V, TA =+25°C, unless otherwise specified.)
CC
=12V, TA=+25°C, unless otherwise specified.)
CC
Figure 1. Magnetic Flux Density of AH920
Page 5
AH920
Document number: DS36768 Rev. 2 - 2
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© Diodes Incorporated
AH920
A Product Line of
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South Pole
Output=Low (For TO-92S-3)
North Pole
Output=High (For TO-92S-3)
South Pole
Output=High (For SOT-23-3)
North Pole
Output=Low (For SOT-23-3)
Package Type
Parameter
Test Condition
Output
TO-92S-3
South Pole
B＞BOP
Low
North Pole
B＜BRP
High
SOT-23-3
South Pole
B＞BOP
High
North Pole
B＜BRP
Low
Magnetic Characteristics (Cont.)
Figure 2. Output Status vs. Magnetic Pole
Table 1. Output Status vs. Magnetic Pole
Page 6
AH920
Document number: DS36768 Rev. 2 - 2
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AH920
A Product Line of
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V
10k
AH920
VCC
OUT
GND
DC
AH920
VCC GND OUT
C
L
20pF
R
L
Output
V
CC1
V
CC2
Magnetic Characteristics (Cont.)
Figure 3. Magnetic Thresholds
Note 2: BOP is determined by putting the device under magnetic field swept from BRP (Min) to BOP (Max) until the output is switched on.
Note 3: BRP is determined by putting the device under magnetic field swept from BOP (Max) to BRP (Min) until the output is switched off.
Test Circuit and Test Conditions
Figure 4. Test Circuit of AH920
Page 7
AH920
Document number: DS36768 Rev. 2 - 2
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December 2013
© Diodes Incorporated
AH920
A Product Line of
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DC
A
I
CC
Output
AH920
VCC
OUT
GND
DC
V
20mA
V
SAT
Output
3.5/20V
AH920
VCC
OUT
GND
Test Circuit and Test Conditions (Cont.)
Figure 5. Test Condition of AH920 (Supply Current)
Note 4: Output initial status is low when powering on.
Note 5: The supply current ICC represents the average supply current. The output is open during measurement.
Note 6: The device is put under the magnetic field: B<B
RP.
Note 7: The output saturation voltage V
Note 8: The device is put under the magnetic field: B>B
Figure 6. Test Condition of AH920 (Output Saturation Voltage)
is measured at VCC=3.5V and VCC=20V.
SAT
OP.
Page 8
AH920
Document number: DS36768 Rev. 2 - 2
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© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
-25 0 25 50 75 100 125
1.5
2.0
2.5
3.0
3.5
4.0
I
CC
(mA)
TA (OC)
VCC=5V
VCC=12V
A
I
OFF
DCDC
AH920
VCC
OUT
GND
12V 20V
4 6 8 10 12 14 16 18 20
1.0
1.5
2.0
2.5
3.0
3.5
4.0
I
CC
(mA)
VCC (V)
TA=25OC
Test Circuit and Test Conditions (Cont.)
Figure 7. Test Condition of AH920 (Output Leakage Current)
Note 9: The device is put under the magnetic field: B<B
Typical Performance Characteristics
ICC vs. VCC ICC vs. TA
RP.
Page 9
AH920
Document number: DS36768 Rev. 2 - 2
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December 2013
© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
5 10 15 20
-20
-10
0
10
20
30
40
50
B
OP
/B
RP
/B
HYS
(Gauss)
VCC (V)
B
OP
B
RP
B
HYS
TA=25OC
-25 0 25 50 75 100 125
-20
-10
0
10
20
30
40
B
OP
/B
RP
/B
HYS
(Gauss)
TA (OC)
B
OP
B
RP
B
HYS
VCC=12V
0 5 10 15 20 25
0
20
40
60
80
100
120
140
160
180
V
SAT
(mV)
I
OUT
(mA)
TA=25OC
VCC=12V
-25 0 25 50 75 100 125
100
120
140
160
180
200
220
240
V
SAT
(mV)
TA (OC)
VCC=5V
VCC=12V
0 25 50 75 100 125 150
0
50
100
150
200
250
300
350
400
450
P
D
(mW)
TA (OC)
SOT-23-3
TO-92S-3
Typical Performance Characteristics (Cont.)
BOP/BRP/B
V
SAT
PD vs. TA
vs. VCC BOP/BRP/B
HYS
vs. I
V
OUT
SAT
vs. TA
HYS
vs. TA
Page 10
AH920
Document number: DS36768 Rev. 2 - 2
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December 2013
© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
AH920 XX XX - XX
Packing
Package
TR : Tape & Reel
Z3 : TO-92S-3
G1 : Green
Product Name
RoHS/Green
Blank : Bulk
N : SOT-23-3
Package
Temperature Range
Part Number
Marking ID
Packing Type
TO-92S-3
-40 to 125°C
AH920Z3-G1
920
Bulk
SOT-23-3
-40 to 125°C
AH920NTR-G1
GS7
Tape & Reel
Ordering Information
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green.
Page 11
AH920
Document number: DS36768 Rev. 2 - 2
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December 2013
© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
Package Sensor Location
1.270(0.050)
TYP
1.600(0.063)
TYP
0.750(0.030)
TYP
1.420(0.056)
1.620(0.064)
1.200(0.047)
1.500(0.059)
1.850(0.073)
2.150(0.085)
44
46
3.850(0.152)
4.150(0.163)
2.900(0.114)
3.310(0.130)
0.380(0.015)
0.550(0.022)
0.360(0.014)
0.480(0.019)
14.000(0.551)
15.500(0.610)
0.360(0.014)
0.510(0.020)
Package Outline Dimensions (All dimensions in mm(inch).)
(1) Package Type: TO-92S-3
Page 12
AH920
Document number: DS36768 Rev. 2 - 2
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December 2013
© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
2.820(0.111)
3.100(0.122)
2.650(0.104)
3.000(0.118)
0.950(0.037)
TYP
0.300(0.012)
0.500(0.020)
1.500(0.059)
1.700(0.067)
1.800(0.071)
2.000(0.079)
0.300(0.012)
0.600(0.024)
0.100(0.004)
0.200(0.008)
0.000(0.000)
0.150(0.006)
0.900(0.035)
1.300(0.051)
1.450(0.057)
MAX.
0.200(0.008)
0
8
0.770(0.030)
1.070(0.042)
1.230(0.048)
1.530(0.060)
Package Sensor
Location
Package Outline Dimensions (All dimensions in mm(inch). Cont.)
(2) Package Type: SOT-23-3
Page 13
AH920
Document number: DS36768 Rev. 2 - 2
13 of 13
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December 2013
© Diodes Incorporated
AH920
A Product Line of
Diodes Incorporated
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
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without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
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1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
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failure of the life support device or to affect its safety or effectiveness.
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IMPORTANT NOTICE
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