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AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Features
* * * * * Micropower operation Operation with North or South Pole 2.5V to 5.5V battery operation Inverted Output-on without Magnet present 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 DFN2020-3, DFN2020-6 package ESD (HBM) 5KV for DFN2020-3 and DFN2020-6 6KV for SC59 SC59, DFN2020-3 and DFN2020-6: Available in "Green" Molding Compound (No Br, Sb) Lead Free Finish / RoHS Compliant (Note 1)
General Description
AH1801 is a Micropower, Ultra-sensitive Hall Effect Switch, which is with two Hall effect plates and a 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 off. The output will be turned on under no magnetic field. While the magnetic flux density (B) is larger than operate point (Bop), the output will be turned off, the output is held until B is lower than release point (Brp), then turned on.
* * * * * *
Applications
* * * Cellular phone PDA Cordless phone
Ordering Information
AH1801 - XX X X
Package W : SC59 FJ : DFN2020-3 SN : DFN2020-6
Note:
Lead Free
Packing -7 : Taping
G : Green
1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7.
Device
AH1801-W AH1801-FJ AH1801-SN
Note:
Package Code
W FJ SN
Packaging (Note 2)
SC59 DFN2020-3 DFN2020-6
7" Tape and Reel Quantity Part Number Suffix
3000/Tape & Reel 3000/Tape & Reel 3000/Tape & Reel -7 -7 -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.
AH1801 Rev. 4
1 of 8 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Pin Assignment
(1) SC59 (2) DFN2020-3
1. Vdd 3. Output
3. Output GND 2. 1 . Vdd (Top View)
2. GND (Bottom view )
(3) DFN2020-6
1. Vdd NC 3. Output
NC 2. GND (Bottom view )
Note:
NC
3. NC is "No Connection", which is recommended to be tied to ground.
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
AH1801 Rev. 4
2 of 8 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Block Diagram
1
Power switch Offset Cancelling Offset Cancelling Hall Plate Output Amp Latch Vdd
3
Logical GND
2
Hall Plate Amp Latch
Typical Circuit
2.5~5.5V
RL Output
AH1801 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 Temp SC59 DFN2020-3 DFN2020-6
Values Unit 7 V Unlimited -40 to +85 C -65 to +150 C 230 150 mW C
AH1801 Rev. 4
3 of 8 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Recommended Operating Conditions
Symbol Vdd Parameter Supply Voltage Operating
(TA = 25C)
Conditions
Rating 2.5~5.5
Unit V
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, 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 Average supply current, TA = 25C, Vdd = 3V Average supply current, TA = -40~85C, Vdd = 2.5~5.5V
Min -
Typ 0.1 <0.1 3 3 5 5 8 8 75 75 0.1
Max 0.3 1 6 9 10 18 16 27 150 150 -
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 60 -10
Characteristic Operate Point Release Point
Min -60 10 -
Typ 40 -40 30 -30
Gauss
Hysteresis
-
10
-
4. Typical data is at TA=25 C, Vdd=3V, and for design information only. 5. Operate point and release point will vary with supply voltage and operating temperature.
AH1801 Rev. 4
4 of 8 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Output ( Voltage )
( off-state ) Turn off
Turn off
Turn Turn on on
( on-state )
-B
Bopn Brpn
Brps Bops
+B
Magnetic
Performance Characteristics
(1) SC59 / DFN2020-3 /DFN2020-6 TA (C) 25 50 60 70 80 85 90 100 110 120 130 140 150
PD (mW)
230
184
166
147
129
120
110
92
74
55
37
18
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 )
AH1801 Rev. 4
5 of 8 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Marking Information
(1) SC59 (2) DFN2020-3
(Top View) XX : KB : AH1801 Y : Year M : Month (A~L) X : Internal code A~Z:Green Package
(Top View) Pin 1 indicator XX YM X K1:AH1801 Date code ID code A~Z: Green Package M : Month (A~L) Y : Year
Package Identification Code DFN2020-3 K1
XX Y M X
Part Number AH1801
Package SC59
Identification Code KB
Part Number AH1801
(3) DFN2020-6
(Top View) Pin 1 indicator XX YM X KB:AH1801 Date code ID code A~Z: Green Package M : Month (A~L) Y : Year
Package Identification Code DFN2020-6 KB
Part Number AH1801
AH1801 Rev. 4
6 of 8 www.diodes.com
JULY 2007
(c) Diodes Incorporated
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT 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) DFN2020-3
0.47/0.53
0.10 C 0.08 C
0.13Max.
Seating plane
0/0.05
B
0.5Typ
R0
C L
Sensor location
0.35/0.45
C
.2
1.95/2.075
0.8/1.0
C L
2x-
0.25 B 0.10 M C A B
0.2/0.3 1.1/1.3
1.95/2.075
0.25 A
Bottom View
2x
AH1801 Rev. 4
7 of 8 www.diodes.com
0.138(Ref.) 0.325(Ref.)
A
JULY 2007
(c) Diodes Incorporated
AH1801
MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH
Package Information
(3) DFN2020-6
0.57/0.63
(Continued)
Marking
0.05 C 0.15max. (Active area depth) Seating plane C
0.08 C 0/0.05 0.15 C
2x
Pin#1 ID B
1.95/2.075 1.45/1.65
0.43mon. A Sensor location 0.2/0.3 0.30/0.40 0.05 M C A B
1.95/2.075
0.76/0.96
R0 .1
2x-
0.15 C 0.65nom. Bottom View
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.
AH1801 Rev. 4
8 of 8 www.diodes.com
JULY 2007
(c) Diodes Incorporated

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