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AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Features
* * * * Micropower operation Operation with North or South Pole 2.4 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 Low profile 3 pin SC59 (commonly known as SOT23 in Asia) and DFN2020-6 package ESD (HBM) 4KV for DFN2020-6 Lead Free Finish / RoHS Compliant (Note 1) Green Packages: SC59 and DFN2020-6
General Description
AH1803 is with two Hall effect plates and a CMOS output driver, mainly designed for battery-operation, hand-held equipment (such as Cellular and Cordless Phone, PDA). The total operation power is down to 24uW in the 3V supply. 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 operate point (Bop), the output will be turned on (low), the output is held until B is lower than release point (Brp), then turned off (High).
* * * * * *
Applications
* * * Cellular phone PDA Cordless phone
Ordering Information
AH1803 - X X X
Package W : SC59 SN : DFN2020-6
Lead Free G: Green
Packing -7 : Taping
Note:
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device AH1803-W AH1803-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.
AH1803 Rev. 1
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JULY 2007
(c) Diodes Incorporated
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Pin Description
Name Vdd GND Output P/I/O P/I P/I O Pin # 1 2 3 Description Power Supply Input Ground Output Pin
Pin Assignment
SC59 DFN2020-6
3. Output GND 2. 1. Vdd
1. Vdd
NC
3. Output
Top view
NC 2. GND NC
Bottom view
Note: 3. NC is "No Connection", which is recommended to be tied to ground.
Block Diagram
1
Power switch Offset Cancelling Offset Cancelling Hall Plate Vdd
Amp
Latch
Logical Hall Plate
3
Out
Amp
Latch
2
GND
AH1803 Rev. 1
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JULY 2007
(c) Diodes Incorporated
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Typical Circuit
Vdd
A H 1803 G nd
O u tp u t
Absolute Maximum Ratings
Symbol Vdd B TA Ts PD TJ
(@ 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 +150 230 230 150
Unit V C C mW mW C
Recommended Operating Conditions
Symbol Vdd Parameter Supply Voltage Operating
(TA = 25C)
Conditions
Rating 2.4~5.5
Unit V
AH1803 Rev. 1
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(c) Diodes Incorporated
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Electrical Characteristics
Symbol Vout Ioff Idd(en) Characteristic Output On Voltage Output Leakage Current
(TA = +25C, Vdd = 3V; unless otherwise specified)
Conditions Iout =1mA Vout = 5.5V, Brpn < B < Brps Chip enable, TA = 25C, Vdd = 3V Chip enable, TA = -40~85C, Vdd = 2.4~5.5V Chip disable, TA = 25C, Vdd = 3V Chip disable, TA = -40~85C, Vdd = 2.4~5.5V Average supply current, TA = 25C, Vdd = 3V Average supply current, TA= -40~85C, Vdd = 2.4~5.5V
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 23 150 150 -
Unit V A mA mA A A A A s ms %
Idd(dis)
Supply Current
Idd(avg) Tawake Tperiod D.C. Awake Time Period Duty Cycle
Magnetic Characteristics
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:
(TA = 25C, Vdd = 3V) (1mT=10 Gauss) Max Unit 4 -2 -1 -
Characteristic Operate Point Release Point Hysteresis
Min 2 -4 1 0.5
Typ 3 -3 2 -2 1
mT
4. Typical data is at Ta =25C, Vdd = 3V, and for design information only. 5. Operate point and release point will vary with supply voltage and operating temperature.
Output ( Output Voltage ) ( Output Voltage )
Output
Vcc ( off-state )
Turn off Turn on
( off-state )
Vcc
Bhy
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 )
AH1803 Rev. 1
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JULY 2007
(c) Diodes Incorporated
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT 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 D (m W )
P o w e r D is s ip a tio n C u rv e 300 200 100 0 0 25 50 75
85
100
125
150
T A ( C )
Marking Information
(1) SC59
(Top View) XX : KD: AH1803 XX Y M X Y : Year 0~9 M : Month A~L X : Internal code A~Z: Green
(2) DFN2020-6
(Top View) Pin 1 indicator XX YM X KD : AH1803 Date code Internal code A~Z: Green Package M : Month (A~L) Y : Year
Package Identification Code DFN2020-6 KD
Part Number AH1803
Package SC59
Identification Code KD
Part Number AH1803
AH1803 Rev. 1
5 of 7 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Package Information
(unit: mm)
(1) Package Type: 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) Package Type: DFN2020-6
0.57/0.63
Marking
0.15max.
0.05 C 0.08 C
0.43mon.
(Active area depth) Seating plane
C
2x
Pin#1 ID B
0/0.05
0.15 C
1.95/2.075 1.45/1.65
A
Sensor location
1.95/2.075
0.76/0.96
2x-
0.15 C
.1 R0
0.65nom.
0.2/0.3
0.30/0.40
0.05 M C A B
Bottom View
AH1803 Rev. 1
6 of 7 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1803
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT 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.
AH1803 Rev. 1
7 of 7 www.diodes.com
JULY 2007
(c) Diodes Incorporated

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