AH9251

AH9251
MEDIUM SENSITIVITY MICROPOWER
OMNIPOLAR HALL-EFFECT SWITCH
Description
Pin Assignments
NEW PRODUCT
The AH9251 is a medium sensitivity Hall-effect switch with internal
pull-up resistor on the output, designed for battery operated handheld
equipments to industrial applications.
(Front View)
A chopper stabilized architecture improves stability of magnetic switch
points over the whole operating range. A sleep-awake logic controls
the sleep and awake time to reduce the average operating current of
the device. During the awake time, the output is changed with the
magnetic flux density. During the sleep time, the output is latched in
its previous state and the current consumption reduces to 4µA typical
at 3V. The average current consumption is 8µA at 3V.
3
OUTPUT
2
GND
1
VDD
TO92S
The output can be switched on with either north or south pole of
sufficient strength. If the magnetic flux density perpendicular to the
part marking surface is larger than operating point (BOP), the output
will be turned on; if it is less than releasing point (B RP), the output will
be turned off.
(Top View)
GND
The AH9251 is available in industry standard TO92S and SC59
packages.
3
Features












Omnipolar Operation (Switching with North or South Poles)
2.5V to 5.5V Power Supply
Micropower Operation
Built in Pull-up Resistor on the Output
Stabilized Chopper
Superior Temperature Stability
Digital Output Signal
-40°C to +85°C Operating Temperature
ESD (HBM): 5000V
Small Low Profile Industry Standard SC59 and TO92S Packages
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1
2
VDD
OUTPUT
SC59
Applications




Handheld Wireless Applications Proximity Detection Switches
Doors, Lids, Covers and Tray Position Detect Switches
Liquid Level Detection
Battery Powered Consumer, Home Appliances and Industrial
Applications
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AH9251
Document number: DS38218 Rev.1 - 2
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AH9251
Typical Applications Circuit
2
1
VDD
OUTPUT
AH9251
100pF
10nF
2.5V to 5.5V
NEW PRODUCT
GND
3
Pin Descriptions
Pin Number
Pin Name
Function
TO92S
SC59
1
1
VDD
2
3
GND
Ground pin
3
2
OUTPUT
Output pin
Power supply pin
Functional Block Diagram
VDD
1(1)
Sleep/Awake
Control
Timing
Logic
Bias
100k
Hall
Plate
+
3(2)
OUTPUT
Chopper
Comparator
2(3)
GND
A (B)
A for TO92S
B for SC59
AH9251
Document number: DS38218 Rev.1 - 2
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AH9251
Absolute Maximum Ratings (Note 4) (@TA = +25°C, unless otherwise specified.)
NEW PRODUCT
Symbol
Notes:
Rating
Unit
VDD
Supply Voltage (Note 5)
Parameter
7
V
IDD
Supply Current (Fault)
6
mA
VOUT
Output Voltage
7
V
IOUT
Output Current
B
Magnetic Flux Density
PD
Power Dissipation
2
mA
Unlimited
Gauss
TO92S
230
SC59
230
mW
TSTG
Storage Temperature
-55 to +150
C
TJ
Junction Temperature
+150
C
–
ESD (Human Body Model) (Note 6)
5000
V
–
ESD (Machine Model) (Note 6)
400
V
4. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
5. The absolute maximum VDD of 7V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate the
device at the absolute maximum rated conditions for any period of time.
6. Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures
whenever handling semiconductor products.
Recommended Operating Conditions
Symbol
VDD
TA
Operating
2.5
Max
5.5
Unit
Supply Voltage
Characteristic
Operating Temperature Range
Operating
-40
+85
°C
Electrical Characteristics
Symbol
Conditions
Min
V
(Note 7) (@TA = +25°C, VDD = 3V, unless otherwise specified.)
Min
Typ
Max
Unit
2.5
3
5.5
V
TA = -40 to +85C, VDD = 2.5V to 5.5V
–
1.8
3
mA
Supply Current During “Sleep” Period
TA = -40 to +85C, VDD = 2.5V to 5.5V
–
4
10
µA
IDD_AVG
Average Supply Current
TA = -40 to +85C, VDD = 2.5V to 5.5V
–
8
15
µA
IOUT
IOFF
Output Current
Output Leakage Current
–
VOUT = 5.5V, Output off
–
–
–
<0.1
1.0
1
mA
µA
Output Saturation Voltage
IOUT = 1.0mA, Output on
–
–
0.4
V
Awake Mode Time
Sleep Mode Time
Duty Cycle
Chopper Frequency
Operating
Operating
–
–
–
–
–
–
150
100
0.15
15
–
–
–
–
µs
ms
%
kHz
VDD
Conditions
Operating
IDD_SL
IDD_AW
VOUT (SAT)
tAW
tSL
D
fC
Note:
Characteristic
Supply Voltage
Supply Current During “Awake”
Period
7. Parameters values over operating temperature range are not tested in production, they are guaranteed by design, process control and characterization.
The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
AH9251
Document number: DS38218 Rev.1 - 2
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AH9251
Electrical Characteristics (Cont.) (@TA = +25°C, VDD = 3V, unless otherwise specified.)
tPERIOD
tAWAKE
IDD_AW
Sample and Output
Latched
IDD_AVG
IDD_SL
0
Magnetic Characteristics (Notes 8 & 9) (@TA = -40°C to +85°C, VDD = 3V, unless otherwise specified.)
(1mT=10 Gauss)
Symbol
Parameter
BOPS (South Pole to Part Marking Side)
Conditions
Min
Typ
Max
Unit
B>BOPS,VOUT=Low (output on)
40
60
80
Gauss
B>BOPN,VOUT=Low (output on)
-80
-60
-40
Gauss
B<BRPS,VOUT=High (output off)
30
50
70
Gauss
B<BRPN,VOUT=High (output off)
-70
-50
-30
Gauss
–
10
–
Gauss
Operating Point
BOPN (North Pole to Part Marking Side)
BRPS (South Pole to Part Marking Side)
Releasing Point
BRPN (North Pole to Part Marking Side)
BHYS ( ︱BOPX - BRPX︱)
Notes:
Hysteresis
(Note 9)
8. Parameters values over operating temperature range are not tested in production, they are guaranteed by design, process control and characterization.
The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.
9. Maximum and minimum hysteresis is guaranteed by design and characterization.
BOPX=operating point (output turns on); BRPX=releasing point (output turns off)
Operating Characteristics
Output Off
High
BOPN
BOPS
Output Voltage
NEW PRODUCT
tSLEEP
BRPN
BRPS
Low
-B
0
Output On
+B
Magnetic Flux Density (Gauss)
Output Voltage vs. Magnetic Flux Density
AH9251
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AH9251
Performance Characteristics
BOP/BRP vs. Ambient Temperature
BOP/BRP vs. Supply Voltage
80
80
60
60
40
IAWAKE (mA)
BOP/BRP (GS)
BOPS
BRPS
BOPN
BRPN
0
-20
20
-20
-40
-40
-60
-60
3.0
3.5
4.0
4.5
5.0
BOPS
BRPS
BOPN
BRPN
0
-80
-40
5.5
-20
0
20
40
60
80
TA ( C)
Average Supply Current vs. Supply Voltage
Awake Mode Time vs. Supply Voltage
3.0
300
2.5
250
2.0
200
1.5
150
1.0
100
0.5
50
0.0
2.5
3.0
3.5
4.0
100
O
VDD (V)
tAWAKE (μs)
BOP/BRP (GS)
20
-80
2.5
4.5
5.0
0
2.5
5.5
VDD (V)
3.0
3.5
4.0
4.5
5.0
5.5
VDD (V)
Sleep Mode Time vs. Supply Voltage
200
175
150
tASLEEP (ms)
NEW PRODUCT
40
125
100
75
50
25
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
VDD (V)
AH9251
Document number: DS38218 Rev.1 - 2
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AH9251
Thermal Performance
Power Dissipation De-rating Curve
(1)
Package Types: SC59 and TO92S
TA (C)
PD (mW)
-40
230
0
230
25
230
50
184
60
166
80
129
85
120
90
110
100
92
110
74
120
55
130
37
140
18
150
0
Power Dissipation Curve
PD (mW)
NEW PRODUCT
70
147
300
200
100
0
0
-40
25
50
75
85
100
125
150
TA (oC)
Ordering Information
AH9251 - X - X
Product Name
Package
P : TO92S
W : SC59
Packing
B : Bulk
7 : 7" Tape & Reel
Device
Package
Code
Packaging
Bulk
Quantity
7” Tape and Reel
Quantity
AH9251-P-B
AH9251-W-7
P
W
TO92S
SC59
1000/Bulk
NA
NA
3000/Tape & Reel
AH9251
Document number: DS38218 Rev.1 - 2
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AH9251
Marking Information
(1)
Package Type: TO92S
(Front View)
Part Number
Y : Year : 0~ 9
WW : Week : 01 ~ 52 , "52 " represents
52 and 53 week
X : Internal Code
9251
NEW PRODUCT
Y WW X
(2)
Part Number
Package
Identification Code
AH9251
TO92S
9251
Package Type: SC59
( Top View )
XX Y W X
Part Number
AH9251
AH9251
Document number: DS38218 Rev.1 - 2
XX : Identification Code
Y : Year : 0 to 9
W : Week : A to Z : 1 to 26 week;
a to z : 27 to 52 week; z represents
52 and 53 week
X : Internal Code
Package
SC59
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Identification Code
HT
September 2015
© Diodes Incorporated
AH9251
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
(1)
Package Type: TO92S(TYPE B)
A
c
E
b2
A2
b
e
D
0
L1
Dim
A
A2
b
b2
c
D
E
e
L
L1
θ
TO92S (TYPE B)
Min
Max
Typ
1.420
1.620
0.750
0.360
0.480
0.380
0.550
0.360
0.510
3.850
4.150
2.900
3.310
1.270
14.000 15.500
1.600
44°
46°
All Dimensions in mm
Min/Max(in mm)
0.4/0.5
1.85/2.15
1.05/1.35
Hall Sensor
1
2
Die
NEW PRODUCT
L
PART
MARKING
SURFACE
3
Sensor Location
AH9251
Document number: DS38218 Rev.1 - 2
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AH9251
Package Outline Dimensions (All dimensions in mm.)
(Cont.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
(2)
Package Type: SC59
A
SC59
Dim
Min
Max
Typ
A
0.35
0.50
0.38
B
1.50
1.70
1.60
C
2.70
3.00
2.80
D
0.95
G
1.90
H
2.90
3.10
3.00
J
0.013 0.10
0.05
K
1.00
1.30
1.10
L
0.35
0.55
0.40
M
0.10
0.20
0.15
N
0.70
0.80
0.75
0°
8°

All Dimensions in mm
NEW PRODUCT
B C
G
H
K
M
N
J
L
D
0.595/0.715
1.5/1.7
0.65/0.85
Min/Max(in mm)
PART
MARKING
SURFACE
Die
Hall Sensor
PIN1
Sensor Location
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
(1)
Package Type: SC59
Y
Z
Dimensions Value (in mm)
Z
3.4
X
0.8
Y
1.0
C
2.4
E
1.35
C
X
AH9251
Document number: DS38218 Rev.1 - 2
E
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AH9251
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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).
NEW PRODUCT
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
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This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
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Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
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
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
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representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2015, Diodes Incorporated
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AH9251
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