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AH1802
MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH
Features
* * * * Micropower operation Operation with magnetic field of either north or south pole (omnipolar) 2.5V to 5.5V battery operation Chopper stabilized * Superior temperature stability * Extremely Low Switch-Point Drift * Insensitive to Physical Stress Good RF noise immunity -40C to 85C operating temperature SC59/Low profile DFN2020-6 package ESD (HBM) 5KV for DFN2020-6 6KV for SC59 SC59 (commonly known as SOT23 in Asia) and DFN2020-6: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 1)
General Description
AH1802 is comprised of two Hall effect plates and an open-drain output driver, mainly designed for battery-operation, hand-held equipment (such as Cellular and Cordless Phone, PDA). The total power consumption in normal operation is typically 24 W with a 3V power source. Either north or south pole of sufficient strength will turn the output on. The output will be turned off under no magnetic field. While the magnetic flux density (B) is larger than operating point (Bop), the output will be turned on (low), the output is held until B is lower than release point (Brp), then turned off.
* * * * * *
Applications
* * * Cover switch in clam-shell cellular phones Cover switch in Notebook PC/PDA Contact-less switch in consumer products
Ordering Information
AH1 802-X X X Package W : SC59 SN : DFN2020-6 Lead Free Packing -7 : Taping
G : Green
Note:
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device AH1802-W AH1802-SN
Note:
Package Code W SN
Packaging (Note 2) SC59 DFN2020-6
7" Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7
2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.
AH1802 Rev. 2
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JULY 2007
(c) Diodes Incorporated
AH1802
MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH
Pin Assignment
(1) SC59 (2) DFN2020-6
( Top View ) 3. Output GND 2. 1. Vdd
1. Vdd
( Bottom view ) NC 3. Output
NC 2. GND
Note: 3. NC is "No Connection" which is recommended to be tied to ground.
NC
Pin Descriptions
Name Vdd GND Output P/I/O P/I P/I O Pin # 1 2 3 Description Power Supply Input Ground Output Pin
Block Diagram
1
Power switch Offset Cancelling Hall Plate Output Amp Latch Vdd
3
Logical GND
2
Offset Cancelling Hall Plate Amp Latch
AH1802 Rev. 2
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JULY 2007
(c) Diodes Incorporated
AH1802
MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH
Typical Circuit
2.5~5.5V
RL C AH1802 GND Output
Note:
4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF~100nF.
Absolute Maximum Ratings
Symbol Vdd B TA TS PD TJ
(at TA = 25C)
Characteristics Supply voltage Magnetic flux density Operating Temperature Range Storage Temperature Range Package Power Dissipation Maximum Junction Temperature SC59 DFN2020-6
Values 7 Unlimited -40 to +85 -65 to +150 230 150
Unit V C C mW C
Recommended Operating Conditions
Symbol Vdd Parameter Supply Voltage Operating
( TA = 25C )
Conditions
Rating 2.5~5.5
Unit V
AH1802 Rev. 2
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JULY 2007
(c) Diodes Incorporated
AH1802
MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH
Electrical Characteristics
Symbol Vout Ioff Idd(en) Idd(dis) Characteristic
( TA = +25C, Vdd = 3V; unless otherwise specified)
Conditions
Min -
Typ 0.1 <0.1 3 3 5 5 8 8 75 75 0.1
Max 0.3 1 6 9 10 14 16 23 125 125 -
Unit V A mA mA A A A A s ms %
Idd(avg) Tawake Tperiod D.C.
Output On Voltage Iout = 1mA Output Leakage Current Vout = 5.5V, Output off Chip enable, TA = 25C, Vdd = 3V Chip enable, TA = -40~85C, Vdd = 2.5~5.5V Chip disable, TA = 25C, Vdd = 3V Chip disable, TA = -40~85C, Vdd = 2.5~5.5V Supply Current Average supply current, TA = 25C, Vdd = 3V Average supply current, TA = -40~85C, Vdd = 2.5~5.5V Awake Time Period Duty Cycle
Magnetic Characteristics
(TA = 25C, Vdd = 3V, Note 5,6) (1mT=10 Gauss)
Symbol Bops(south pole to brand side) Bopn(north pole to brand side) Brps(south pole to brand side) Brpn(north pole to brand side) Bhy( Bopx - Brpx )
Note:
Characteristic Operate Point
Min 20 -40
Typ 28 -28 20 -20 8
Max 40 -20 -10 -
Unit
Release Point Hysteresis
10 5
Gauss
5. Typical data is at TA = 25C, Vdd = 3V, and for design information only. 6. Operating point and release point will vary with supply voltage and operating temperature.
Output ( Output Voltage ) ( Output Voltage )
Output
Vcc ( off-state ) Bhy
Turn off
( off-state )
Vcc
Turn on
Turn off
Bhy
Turn on
( on-state )
Vsat Bopn Brpn 0 ( Magnetic flux density B )
Vsat
( on-state )
0 Brps Bops ( Magnetic flux density B )
AH1802 Rev. 2
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JULY 2007
(c) Diodes Incorporated
AH1802
MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH
Performance Characteristics
(1) SC59 and DFN2020-6 TA (C) PD (mW) 25 230 50 184 60 166 70 147 80 129 85 120 90 110 100 92 110 74 120 55 130 37 140 18 150 0
P o w e r D is s ip a tio n C u rv e P D (m W ) 250 200 150 100 50 0 0 25 50 75 100 125 150 T A ( )
Marking Information
(1) SC59
( Top View ) XX Y M X : KC : AH1802 : Year 0~9 : Month A~L : Internal code A~Z: Green
(2) DFN2020-6
( Top View ) Pin 1 indicator XX YM X KC : AH1802 Date code Internal code A~Z : Green M : Month (A~L) Y : Year (0~9)
Package Identification Code DFN2020-6 KC
XX Y M X
Part Number AH1802
Package SC59
Identification Code KC
Part Number AH1802
AH1802 Rev. 2
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JULY 2007
(c) Diodes Incorporated
AH1802
MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH
Package Information
(unit: mm)
(1) SC59 (commonly known as SOT23 in Asia)
0.35/0.50
1.50/ 1.70
TOP VIEW
2.70/ 3.00
1.90 2.90/3.10 1.00/ 1.30 0.10/0.20
0.013/0.10
0.95
0.35/0.55 0/8
(2) DFN2020-6
0.57/0.63 0.43mon.
Marking
0.05 C 0.15max. (Active area depth) Seating plane C 1.95/2.075 1.45/1.65
0.08 C 0/0.05 2x 0.15 C
Pin#1 ID B
A
Sensor location
1.95/2.075
0.76/0.96
R0
.1
2x-
0.15 C 0.65nom. Bottom View 0.2/0.3 0.05 M C A B
AH1802 Rev. 2
6 of 7 www.diodes.com
0.30/0.40
JULY 2007
(c) Diodes Incorporated
AH1802
MICROPOWER, ULTRA-SENSITIVE OMNIPOLAR HALL-EFFECT SENSOR SWITCH
IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products 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 our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated.
AH1802 Rev. 2
7 of 7 www.diodes.com
JULY 2007
(c) Diodes Incorporated

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