Diodes AH1822 User Manual

AH1822

MICROPOWER 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 Switc h-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)

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

General Description

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.

Package

FT4 : DFN2015-6

FU4 : DFN3020-6

G : Green

PackingGreen

7 : Tape & Reel

Device

Package

Code

Packaging

(Note 2)

Quantity Part Number Suffix

7” Tape and Reel

AH1822-FT4G-7 FT4 DFN2015H4-6 3000/Tape & Reel -7
AH1822-FU4G-7 FU4 DFN3020H4-6 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 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

Pin Assignments

( Top View )

1

NC

Vdd

GND

2
3

AH1822

MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR

SWITCH

( Top View )

6
5
4

NC
Output
GND

Output

NC

GND

1

2

3

6

Vdd

5

NC

4

GND

DFN2015-6

Notes: 3. NC is “No Connection” which is recommended to be tied to ground.

Pin Descriptions

Pin Name P/I/O Description

Vdd P/I Power Supply Input

GND P/I Ground

Output O Output Pin

NC NC No Connected

Block Diagram

Vdd

Power
switch

Latch

Hall Plate

Cancelling

Offset

Amp

DFN3020-6

Output

Logical

Hall Plate

AH1822 Rev. 5 2 of 9 FEBRUARY 2009

Cancelling

Offset

Amp

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Latch

GND

Typical Circuit

AH1822

MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR

SWITCH

2.5~5.5V

R

L

C

AH1822

GND

Notes: 4. C is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF~100nF.
R

is the pull-up resistor, the recommended resistance is 10KΩ~100KΩ.

L

Output

Absolute Maximum Ratings (at TA= 25°C)

Symbol Characteristics Values Unit

Vdd Supply voltage 7 V

B Magnetic flux density Unlimited

TST Storage Temperature Range -65 to +150

PD Package Power Dissipation 230 mW

TJ

Maximum Junction Temperature 150

Recommended Operating Conditions

Symbol Parameter Conditions Rating Unit

Vdd Supply Voltage Operating 2.5~5.5 V

TA Operating Temperature Range Operating -40 to +85

°C

°C

°C

AH1822 Rev. 5 3 of 9 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

⎯

⎯

⎯

AH1822

MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR

SWITCH

Electrical Characteristics (TA = +25°C, Vdd = 3V; unless otherwise specified)

Symbol Characteristic Conditions Min Typ. Max Unit

Vout Output On Voltage Iout=1mA

Ioff Output Leakage Current Vout=5.5V, Output off

Idd(en)
Idd(en)

Chip enable , T
Chip enable , T
Vdd = 2.5~5.5V

A= 25°C , Vdd = 3V ⎯
A= -40~85°C ,

⎯

⎯

Idd(dis) Chip disable , TA= 25°C , Vdd = 3V ⎯ 5 10 µA
Idd(dis)

Idd(avg)

Idd(avg)

Supply Current

Chip disable , T
Vdd = 2.5~5.5V
Average supply current ,

A= 25°C , Vdd = 3V

T
Average supply current ,
T

A= -40~85°C , Vdd = 2.5~5.5 V

A= -40~85°C ,

⎯

⎯

⎯

FC Chopping Frequency For design information only
Tawake Awake Time (Note 5)
Tperiod Period (Note 5)

D.C. Duty Cycle

Notes: 5. When power is initially on, the operating Vdd (2.5V to 5.5V) must be applied to be guaranteed for the output sampling. The output state is valid

after the second operating phase (typical 150ms).

0.1 0.3 V

<0.1

3 6 mA
3 10 mA

5 18 µA

8 16 µA

8 28 µA

300

⎯
⎯
⎯

75 150 µs
75 150 ms

0.1

1 µA

KHz

⎯

%

Tperiod

Tawake

Idd(en)

Sample and output

Idd (dis)

0

latched

AH1822 Rev. 5 4 of 9 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR

Magnetic Characteristics (TA=25°C, Vdd=3V, Note 6, 7)

Symbol Characteristic Min Typ. Max Unit

Bops(south pole to brand side)
Bopn(north pole to brand side) -55 -28 ­Brps(south pole to brand side)
Brpn(north pole to brand side) - -20 -10

Bhy( BrpxBopx − )

Notes: 6. Typical data is at Ta = 25°C, Vdd = 3V, and for design information only.

7. Operatin g point and release point will vary with supply voltage and operati ng temperature.

Operate Point
Release Point

Hysteresis 5 8 -

Output

- 28 55

10 20 -

Output

AH1822

SWITCH

(1mT=10 Gauss)

Gauss

( off-state )

Vcc

Turn off

Turn on

Bhy

( Output Voltage )

( on-state )

Bopn Brpn 0

( Magnetic flux density B )

Performance Characteristics

TA (°C)

PD (mW)

25 50 60 70 80 85 90 100 110 120 130 140 150

230 184 166 147 129 120 110 92 74 55 37 18 0

P

(m W)

D

300

200

Turn off

( Output Voltage )

Vsat

Vsat

( Magnetic flux density B )

Power Dissipation Curve

( off-state )

Bhy

Brps Bops0

Vcc

Turn on

( on-state )

100

0

0 25 50 75 100 125 150

85

TA (。C)

AH1822 Rev. 5 5 of 9 FEBRUARY 2009

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Marking Information

(1) DFN2015-6

( Top View )

Part Number Package Identification Code

AH1822 DFN2015-6 K7

XX

Y

AH1822

MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR

Pin 1 indicator

XX

: Identification Code

WX

Y : Yea r : 0 ~ 9

: Week : A~Z : 1~26 week ;

W

a~z : 27~52 week; z represents

52 and 53 week

: A~Z : G reen

X

SWITCH

(2) DFN3020-6

Part Number Package Identification Code

AH1822 DFN3020-6 K8

( Top View )

X X

XY

W

Pin 1 indicator
XX

: Identific a tion C o d e

Y : Ye a r : 0 ~ 9

: Week : A~Z : 1~26 week;

W

a~z : 27~52 week; z represents

52 and 53 week

X

: A~ Z : Gr een

AH1822 Rev. 5 6 of 9 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR

Package Information (All Dimensions in mm)

(1) Package type: DFN2015-6

aaa A

2x-

1.45/1.575

B

1.95/2.075

aaa B

2x-

ccc C

6x-

0.08 C

0.40Max.

(Pin #1)

0/0.05

(Pin #1)

0.25/0.35

1.0/1.2

4x-0.50

A

0.13Typ.

C

0.7/0.9

Seating Plane

4x-0.50

(Pin #1)

2.0

AH1822

SWITCH

6x-0.75

0.20/0.30

Bottom View

C

bbb

AB

6x-0..30

Land Pattern Recommendation

(Unit:mm)

(2) Package type: DFN3020-6

aaa A

2X-

1.95/2.075

6x-

2X-

bbb

aaa

ccc C

0.08 C

B

0.40Typ.

C

AB

B

2.95/3.075

(Pin #1)

0/0.05

(Pin #1 ID)

1.124/1.324

0.50/0.60

0.20/0.30

Bottom View

0.50Typ.

0.942/1.142

A

0.15Typ.
Seating Plane

C

3.0

Land Pattern Recommendation

4x-0.50

(Unit: mm)

6x-0.30

(Pin #1)

4x-0.75

AH1822 Rev. 5 7 of 9 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

Taping Orientation

(1) DFN2015-6

AH1822

MICROPOWER OMNIPOLAR HALL-EFFECT SENSOR

SWITCH

(2) DFN3020-6

Notes: 8. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf

AH1822 Rev. 5 8 of 9 FEBRUARY 2009

www.diodes.com © Diodes Incorporated

.

AH1822

MICROPOWER 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.

AH1822 Rev. 5 9 of 9 FEBRUARY 2009

www.diodes.com © Diodes Incorporated