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AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Features
* * * * Micropower operation Operation with North or South Pole 1.65 to 3.3V 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 ESD 4KV in human body mode SOT553: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 1)
General Description
AH1884 is with two Hall effect plates and dual CMOS output driver, mainly designed for battery-powered, hand-held equipment (such as Cellular and Cordless Phone, PDA). The total operation power is down to 15uW in the 1.8V 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.
* * * * *
Applications
* * * Cellular phone PDA Cordless phone
Ordering Information
AH1884 - X X X
Package Z : SOT553
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 AH1884-Z
Note:
Package Code Z
Packaging (Note 2) SOT553
7" Tape and Reel Quantity Part Number Suffix 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.
AH1884 Rev. 3
1 of 7 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Pin Assignment
( Top View )
5 4
1
2
3
SOT553
Pin Descriptions
Name Out 2 GND N.C Vdd Out 1 P/I/O O P/I P/I O Pin # 1 2 3 4 5 Description Output Pin ( active High ) Ground Power Supply Voltage Output Pin ( active Low )
Block Diagram
Vdd
Power switch Offset Cancelling Offset Cancelling Hall Plate
Amp
Latch
Out1
Logical Hall Plate
GND Vdd
Amp
Latch
Out2 GND
AH1884 Rev. 3
2 of 7 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Typical Circuit
Vdd
Output 1 AH1884 Output 2 Gnd
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
Values 5 Unlimited -40 to +85 -65 to +150 230 150
Unit V C C mW C
Recommended Operating Conditions
Symbol Vdd Parameter Supply Voltage
(TA = 25C )
Conditions Operating
Rating 1.65~3.3
Unit V
Electrical Characteristics
Symbol VOH VOL Ioff Idd(en) Idd(dis) Idd(avg) Tawake Tperiod D.C. Characteristic
(TA = +25C, Vdd = 1.8V; unless otherwise specified) Conditions IO= -0.5mA IO= 0.5mA Output off Chip enable Chip disable average supply current Min Vdd-0.2 Typ <0.1 2 5 7 50 50 0.1 Max 0.2 1 4 8 12 100 100 Unit V V A mA uA uA s ms %
Output On Voltage (High side) Output On Voltage (Low side) Output Leakage Current Supply Current Awake Time Period Duty Cycle
AH1884 Rev. 3
3 of 7 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Magnetic Characteristics
(TA = 25C, Vdd = 1 .8V~3.0V)
(Note 3)
(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 )
Notes:
Characteristic (Note 4) Operate Point Release Point Hysteresis
Min -55 15 3
Typ 37 -37 29 -29 8
Max 55 -15 -
Unit
Gauss
3. Typical data is at Ta = 25C, Vdd = 3V, and for design information only. 4. Operate point and release point will vary with supply voltage and operating temperature.
Output1 ( Output Voltage ) ( Output Voltage )
Output1
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 )
AH1884 Rev. 3
4 of 7 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Typical Operating Characteristics
Switching Point
AH1884 Hysteresis vs Temp. 50 40 30 20 10 Gauss(G) 0 -10 -20 -30 -40 -50 -50 -25 0 25 Temp. 50 75 100
-60
(Vdd = 1.8V)
Gauss (G) 60
AH1884 Hysteresis vs Vdd
(Ta =25 Degree C)
40
Brpn Bopn Brps Bops Bhys_n Bhys_s
0 20
Brpn Bopn Brps
1.8
-20 -40
2.3
2.8
Bops Bhys_n Bhys_s
Vdd(V)
Supply Current
AH1884 Idd(avg.) vs Temp. 10 9 8 Idd(avg.) unit : uA 7 6 5 4 3 2 -50 -25 0 25 Temp. 50 75 100 Vdd = 1.8V Vdd = 2.5V
AH1884 Idd(avg.) vs Vdd 12 10 Idd(avg.) unit: uA 8 6 4 2 0 1.8 2.3
(Ta=25 Degree C)
Icc (avg) uA
2.8 Vdd(V)
AH1884 Rev. 3
5 of 7 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Performance Characteristics
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) SOT553
(Top View) XX : KR: AH1884 XX Y M X Y : Year 0~9 M : Month A~L X : Internal code A~Z: Green
Identification Code KR
Part Number AH1884
Package SOT553
AH1884 Rev. 3
6 of 7 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1884
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Package Information
(1) Package Type: SOT553
(unit: mm)
1.50/1.70 1.0Typ.
0.30 C D
0.30 C D
C L
A
D
0.10/0.18
6~8
1.55/1.70
Hall Sensor 1.10/1.25
C L
0.30 C
0.1
0.2(5x)
6~8
0.10/0.20
0.10 M C A-B D
Bottom View
Top View
B
Top Package Btm Package 6~ 8
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.
AH1884 Rev. 3
7 of 7 www.diodes.com
0.55/0.60
JULY 2007
(c) Diodes Incorporated

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