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PDF AH1822 Data sheet ( Hoja de datos )

Número de pieza AH1822
Descripción MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR SWITCH
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Features
AH1822
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
General Description
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
-40°C to 85°C operating temperature
ESD (HBM) 5KV
DFN2015-6 and DFN3020-6: Available in “Green”
Molding Compound (No Br, Sb)
Lead Free Finish/ RoHS Compliant (Note 1)
AH1822 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 24μW
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
AH 1822 - XXX G - 7
Package
FT4 : DFN2015-6
FU4 : DFN3020-6
Green
G : Green
Packing
7 : Tape & Reel
Device
AH1822-FT4G-7
AH1822-FU4G-7
Package
Code
FT4
FU4
Packaging
(Note 2)
DFN2015H4-6
DFN3020H4-6
7” Tape and Reel
Quantity
Part Number Suffix
3000/Tape & Reel
-7
3000/Tape & Reel
-7
Notes:
1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied, see EU Directive 2002/95/EC Annex Notes.
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.
AH1822 Rev. 5
1 of 9
www.diodes.com
FEBRUARY 2009
© Diodes Incorporated

1 page




AH1822 pdf
AH1822
MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR
SWITCH
Magnetic Characteristics (TA=25°C, Vdd=3V, Note 6, 7)
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 )
Characteristic
Operate Point
Release Point
Hysteresis
Min
-
-55
10
-
5
Typ.
28
-28
20
-20
8
Notes: 6. Typical data is at Ta = 25°C, Vdd = 3V, and for design information only.
7. Operating point and release point will vary with supply voltage and operating temperature.
Output
Output
(1mT=10 Gauss)
Max Unit
55
-
- Gauss
-10
-
Vcc ( off-state )
Turn on
Bhy
Turn off
( on-state )
Vsat
Bopn Brpn 0
( Magnetic flux density B )
( off-state ) Vcc
Turn off
Bhy
Turn on
Vsat
( on-state )
0 Brps Bops
( Magnetic flux density B )
Performance Characteristics
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
PD (m W )
300
P ow er D issipation C urve
200
100
0
0
25
50
75 85 100
125
150
TA (C )
AH1822 Rev. 5
5 of 9
www.diodes.com
FEBRUARY 2009
© Diodes Incorporated

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