AH1888-ZG-7 - Diodes Incorporated

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 1 of 11

www.diodes.com February 2012

Description

The AH1888 micro power Omni-polar Hall Effect switch IC

designed for portable and battery powered equipment such

as cellular phones, PDA’ s and portable PC’ s. Based on

two sensitive Hall Effect plates and chopper stabilized

architecture the AH1888 provides a reliable solution over the

whole operating range. To support portable and battery

powered equipment the design has been optimized to

operate over the supply range of 1.65V to 3.3V and

consumes only 12.6µW with a supply of 1.8V.

The outputs are switched with either a north or south pole of

sufficient strength. When the magnetic flux density (B) is

larger than operate point (Bop ) the output is s witched on. The

output is turned off when B becomes lower than the release

point (Brp). The output will remain off when there is no

magnetic field. The AH1888-ZG has two outputs, output one

pulls low when switched on and output two is inverted. The

AH1888-FJG provides output one and AH1888-FJRG

provides output two.

Features

• Omni-polar (north or south pole) oper ation

• Single or dual output options

• Internal output pull up capability

• Micropower operation

• 1.65V to 3.3V operating rang e

• Chopper stabilized design provides

• Superior temperature stabilit y

• Minimal switch point drift

• Enhanced immunity to stress

• Good RF noise immunity

• -40°C to 85°C operating temp erature

• ESD (HBM)＞4KV for SOT553

• ESD (HBM)＞5KV for U-DFN2020-3 and U-D FN2020R-3

• Package: SOT553, U-DFN2020-3 and U-DFN2020R-3

• Halogen and Antimony free “G reen” device

Pin Assignments

5

43

2

1

GND

Output1

NC

Output 2

Vdd

( Top View )

SOT553

U-DFN2020-3

(Top View)

3. G N D

2. Output 11. V dd

U-DFN2020R-3

(Top View)

3. G ND

2. O ut put 21. Vdd

Applications

• Cellular phone

• Portable PC and PDAs

• Camcorders

• Cordless phone

• Contactless switch in consumer products

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 2 of 11

www.diodes.com February 2012

Typical Application Circuit

(1) SOT553 (2) U-DFN2020-3 (3) U-DFN2020R -3

AH1888

Vdd

Output 1

GND

Output 2

AH1888

Vdd

Output 1

GND

AH1888

Vdd

Output 2

GND

Pin Descriptions

Pin Name P/I/O Description

Vdd P/I Power Supply Voltage

GND P/I Ground

Output 1 O Output Pin ( Active Low )

Output 2 O Output Pin ( Active High )

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 3 of 11

www.diodes.com February 2012

Functional Block Diagram

(1) SOT553

Output

Driver

Controller

Latch

Sleep/Awake Logic

and Power Switch

Vdd

Hall

Plate Amp

Hall

Plate Amp Output 2

GND

Offset

Cancellation Offset

Cancellation

Output 1

GND

Vdd

(2) U-DFN2020-3

Output

Driver

Controller

Latch

Sleep/Awake Logic

and Power Switch

Vdd

Hall

Plate Amp

Hall

Plate Amp

Output 1

Offset

Cancellation Offset

Cancellation

GND

(3) U-DFN2020R -3

Output

Driver

Controller

Latch

Sleep/Awake Logic

and Power Switch

Vdd

Hall

Plate Amp

Hall

Plate Amp

Output 2

Offset

Cancellation Offset

Cancellation

GND

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 4 of 11

www.diodes.com February 2012

Absolute Maximum Ratings (TA = 25°C)

Symbol Characteristics Values Unit

Vdd Supply voltage 5 V

B Magnetic flux density Unlimited

TS Storage Temperature Range -65 to +150 °C

PD Package Power Dissipation 230 mW

TJ Maximum Junction Temperature 150 °C

Recommended Operating Conditions (TA = 25°C)

Symbol Characteristic Conditions Rating Unit

Vdd Supply Voltage Operating 1.65 to 3.3 V

TA Operating Temperature Range Operating -40 to +85 °C

Electrical Characteristics (TA = 25°C, Vdd = 1.8V, unless otherwise specified)

Symbol Characteristic Conditions Min Typ. Max Unit

VOH Output On Voltage (High side) IO = -0.5mA Vdd - 0.2 - - V

VOL Output On Voltage (Low side) IO = 0.5mA - - 0.2 V

Idd(en) Supply Current Chip enable - 2 4 mA

Idd(dis) Chip disable - 5 8 µA

Idd(avg) Average supply current - 7 12 µA

Tawake Awake Time (Note 1) - 50 100 µs

Tperiod Period (Note 1) - 50 100 ms

D.C. Duty Cycle - 0.1 - %

Notes: 1. When power is initially turned on, Vdd must be within its correct operating range (1.65V to 3.3V) to guarantee the output sampling. The output state is

valid after the second operating cycle (typical 100ms).

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 5 of 11

www.diodes.com February 2012

Magnetic Characteristics (TA = 25°C, Vdd = 1.8V ~ 3.0V, Note 2 & 3)

(1mT=10 Gauss)

Symbol Characteristic Min Typ. Max Unit

Bops(south pole to brand side) Operate Point - 61 79

Gauss

Bopn(north pole to brand side) -79 -61 -

Brps(south pole to brand side) Release Point 35 53 -

Brpn(north pole to brand side) - -53 -35

Bhy( BrpxBopx −) Hysteresis 3 8 -

Notes: 2. Typical data is at Vdd = 3V.

3. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.

Bhy

Vsat

Vdd

( Output Voltage )

Bopn Brpn 0

( Magnetic flux density B )

Turn on Turn off

( off-state )

( on-state )

Bhy

Vsat

Vdd

( Output Voltage )

Brps Bops

0

( Magnetic flux density B )

Turn off

Turn on

( off-state )

( on-state )

NNS S

Output 1 ( Active Low )

Bhy

Vsat

Vdd

( Output Voltage )

Bopn Brpn 0

( Magnetic flux density B )

Turn on Turn off

( off-state )

( on-state )

Bhy

Vsat

Vdd

( Output Voltage )

Brps Bops

0

( Magnetic flux density B )

Turn off Turn on

( off-state )

( on-state )

NNS S

Output 2 ( Active High )

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 6 of 11

www.diodes.com February 2012

Typical Characteristics

-50 -25 0 25 50 75 100

TEMPERATURE (°C)

Switch Points vs. Temperature

V = 2.8V

DD

80

60

40

20

-20

-40

-60

-80

0

SWI

T

C

H

P

O

I

N

T

(

G

auss)

Brps

Bops

Bopn

Brpn

1.5 2.0 2.5 3.0 3.2

V (V)

Swi tc h Poi nts vs. Temperatur e

T = 25°C

DD

A

80

60

40

20

-20

-40

-60

-80

0

SWI

T

C

H

P

O

IN

T

(

G

auss)

Brps

Bops

Brpn

Bopn

Performance Characteristics

For SOT553, U-DFN2020 -3 and U-DFN3030R-3

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

T = 25°C

Power Dissipation

A

0255075

85

100 125 150

300

200

100

0

P

(W)

D

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 7 of 11

www.diodes.com February 2012

Ordering Information



AH 1888 -

X

XX G-7

Packin

g

Package Green

Z : SOT553 G : Green 7 : Tape & Reel

FJ : U-DFN2020-3

FJR : U-DFN2020R-3

Device Package

Code Packaging

(Note 4 & 5) 7” Tape and Reel

Quantity Part Number Suffix

AH1888-ZG-7 Z SOT553 3000/Tape & Reel -7

AH1888-FJG-7 F J U-DFN2020-3 3000/Tape & Reel -7

AH1888-FJRG-7 FJR U-DFN2020R-3 3000/Tape & Reel -7

Notes: 4. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. No purposely added lead. Halogen and Antimony free. Please visit our

website at http://www.diodes.com/products/lead_free.html.

5. 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.

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 8 of 11

www.diodes.com February 2012

Marking Information

(1) SOT553

( Top View )

Y : Year : 0~9

X : A~Z : Green

XX : Identification Code

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

a~z : 27~52 week;

z represents 52 and 53 week

XX Y W X

Part Number Package Identification Code

AH1888 SOT553 KV

(2) U-DFN20 20-3 and U-DFN2020R-3

( Top View )

XX Pin 1 indicator

Y : Y e a r : 0~9

X : A~ Z : G r e e n

XX : Id entification Cod e

W : Week : A~Z : 1 ~26 w e ek;

a~z : 27~52 week;

z represents 52 and 53 week

YWX

Part Number Package Identification Code

AH1888 U-DFN2020-3 KV

AH1888 U-DFN2020R-3 KW

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 9 of 11

www.diodes.com February 2012

Package Outline Dimensions (All Dimensions in mm)

(1) Package Type: SOT553

1.0Typ.

0.15/0.30(5x)

0.30 C

0.10M C A-B D

B

CL

D

0.30 C

D

0.10/0.18

1.50/1.70

0.30 C D

A

Top View

1.2

Land Pattern Recommendation

(Unit:mm)

1.0Typ.

1.7

2.2

Pin1 Pin1

0.1

0.5Typ. 0.5Typ. 0.3

0.32/0.58 Hall Sensor

0.3 0.07

±

Die

=Packa ge Cen ter Location Line

5x-0.5

1.10/1.25

1.55/1.70

0.45/0.67

CL

0.55/0.62

6~8

°°

6~8

°°

6~8

°°

CL

(2) Package Type: U-DFN2020-3 and U-DFN2020R-3

1

0.6 0.4 0.45

1.1

0.15

R0.225

0.322

0.450.48 1.4

R0.2

0.35

0.689 0.45

R0.2

1.1/1.3 0.325Ref.

B

0.25 B

2x-

0.10 M C A B

0.35/0.45

0/0.05

0.57/0.63

0.10 C

0.08 C

1.95/2.075

A

0.25 A

2x

C

Seating plane

Bottom View

1.95/2.075

Sensor location

Land Pattern Recomm endation

(Unit:mm)

Top View

0.74

1.03

0.8/1.0

Top View

DIE

0.18 0.07

±

Pin1

= Package Center location Line

2.3

1

CL

0.2/0.3

CL

0.152 Typ0.138 Ref

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 10 of 11

www.diodes.com February 2012

Taping Orientation (Note 6)

For U-DFN2020-3 and U-DFN2020R-3

Notes: 6. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.

AH1888

MICROPOWER, GENERAL-SENSITIVE HALL EFFECT

SWITCH

AH1888

Document number: DS31565 Rev. 8 - 2 11 of 11

www.diodes.com February 2012

IMPORTANT NOTICE

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS

DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A

PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAW S OF ANY JURISDICTION).

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other

changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability

arising out of the application or use of this document or any produc t described herein; neither does Diodes Incorporated convey any

license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described

herein 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 Diodes Incorporated websit e, harmless agai nst all damages.

Diodes Incorporated does not warrant or accept any liabi lity what soever in respect of any products purchased through unauthorized

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Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall

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arising out of, directly or indirectly, any cl aim of personal injury or death associated with such unintended or unauthorized application.

Products described herein may be covered by one or more United States, international or f oreign patents pending. Product names

and markings noted herein may also be covered by one or m ore Uni ted St ates, i nternational or foreign trademarks.

LIFE SUPPORT

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without

the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:

A. Life support devices or systems are devices or systems which:

1. are intended to implant into the body, or

2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided

in the labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a life support devic e or system whose failure t o perform can be reasonably expected

to cause the failure of the life support devic e or to aff ect its safety or effectiveness.

Customers represent that they have all necessary expert ise in the safety and regulatory ramifications of their life s upport devic es or

systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements

concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems,

notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further,

Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes

Incorporated product s i n such safety-critical, life support devices or systems.

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