Diodes AH1902 User Manual

A

HIGH SENSITIVITY MICROPOWER

OMNIPLOAR HALL-EFFECT SWITCH

Description

The AH1902 is a high sensitivity micropower Omnipolar Hall effect

switch IC with internal pull up and pull down capability. Designed for

portable and battery powered consumer equipment such as cellular

phones and portable PCs to office equipment, home appliances and

industrial applications, the average supply current is only 4.3uA at

1.8V. To support potable equipment the AH1902 can operate over the

supply range of 1.6V to 3.6V and uses a hibernating clocking system

to minimize the power consumption. To minimize PCB space the

AH1902 is available in small low profile X1-DFN1216-4 and X2-

DFN2015-6 packages.

The output is activated with either a north or south pole of sufficient

magnetic field strength. When the magnetic flux density (B)

perpendicular to the package is larger than operate point (Bop), the

output will be turned on (pulled low) and held until B is lower than

release point (Brp).

Features

NEW PRODUCT

• Omnipolar Operation (North or South Pole)

• Supply Voltage of 1.6V to 3.6V

• High Sensitivity

• Micropower Operation

• Chopper Stabilized Design Provides:

 Superior Temperature Stability

 Minimal Switch Point Drift

 Enhanced Immunity to Physical Stress

• No External Pull-up Resistors Required

• Good RF Noise Immunity

• -40°C to +85°C Operating Temperature

• High ESD capability of 8kV (Human Body Model)

• Small Low Profile X1-DFN1216-4 and X2-DFN2015-6 Packages

• Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

• Halogen and Antimony Free. “Green” Device (Note 3)

Notes: 1. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. All applicable RoHS exemptions applied.

2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.

3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds.

Pin Assignments

Applications

• Open and Close Detect for flip/slide Cellular Phones

• Smart Cover or Dock Detect for Cellular Phones and Tablet PCs

• Cover or Display Switch in Portable PCs (eg Ultrabook)

• Digital Still, Video Cameras and Handheld Gaming Consoles

• Door, Lids and Tray Position Switches

• Level, Proximity and Position Switches

• Contact-Less Switches in Home Appliances and Industrial

Applications

Typical Applications Circuit

H1902

Note: 4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical and should be placed as close to

AH1902

Document number: DS36533 Rev. 2 - 2

the supply pin as possible.

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Pin Descriptions

Package: X1-DFN1216-4

Pin Number Pin Name Function

1 OUTPUT Output Pin

2 GND Ground Pin

3 NC No Connection (Note 5)

4 VDD Power Supply Input

Pad Pad

Package: X2-DFN2015-6

Pin Number Pin Name Function

1 OUTPUT Output Pin

2 NC No Connection (Note 5)

3 NC No Connection (Note 5)

4 GND Ground Pin

5 NC No Connection (Note 5)

6 VDD Power Supply Input

NEW PRODUCT

Pad Pad

Note: 5. NC is “No Connection” pin and is not connected internally. This pin can be left open or tied to ground.

The center exposed pad - It is internally connected to V be connected to GND or any other signal on the PCB. The exposed pad should be left open (unconnected) on the PCB layout.

The center exposed pad – No connection internally. The exposed pad can be left open (unconnected) or tied to the GND on the

PCB layout.

Functional Block Diagram

pin and should not

DD

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Absolute Maximum Ratings (Note 6) (@T

Symbol Parameter Rating Unit

VDD Supply Voltage (Note 7) 6 V

V

Reverse Supply Voltage -0.3 V

DD_REV

I

Output current (source and sink) 3 mA

OUTPUT

B Magnetic Flux Density Unlimited

PD Package Power Dissipation

Ts Storage Temperature Range -65 to +150 °C

TJ Maximum Junction Temperature 150 °C

ESD HBM Human Body Model (HMB) ESD capability 8 kV

Notes: 6. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.

7. The absolute maximum V operate the device at the absolute maximum rated conditions for any period of time.

of 6V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to

DD

Recommended Operating Conditions (@T

Symbol Parameter Conditions Rating Unit

NEW PRODUCT

VDD Supply Voltage Operating 1.6V to 3.6V V

TA Operating Temperature Range Operating -40 to +85

Electrical Characteristics (@T

Symbol Parameter Conditions Min Typ Max Unit

VOL Output Low Voltage (on) I

VOH Output High Voltage (off) I

Ioff Output Leakage Current V

IDD(awake)

Supply Current

IDD(sleep)

IDD(avg) Average Supply Current

Tawake Awake Time (Note 8)

Tperiod Period (Note 8)

D.C. Duty Cycle

Note: 8. When power is initially turned on, the operating VDD (1.6V to 3.6V) must be applied to guaranteed the output sampling. The output state is valid after the second operating cycle (typical 100ms).

= +25°C, VDD = 1.8V, unless otherwise specified.)

A

= +25°C, unless otherwise specified.)

A

X1-DFN1216-4 230 mW

X2-DFN2015-6 230 mW

= +25°C, unless otherwise specified.)

A

= 1mA — 0.1 0.2 V

OUT

= -1mA VDD-0.2 VDD-0.1 — V

OUT

= 3.6V, Output off

OUT

During ‘awake’ period,

= +25°C, VDD = 3V

T

A

During ‘sleep’ period,

= +25°C, VDD = 3V

T

A

T

= +25°C, VDD = 1.8V — 4.3 8 µA

A

TA = +25°C, VDD = 3.6V

—

< 0.1 1 µA

2.1 — mA

2.5 — µA

7.2 13 µA

50 100 µs

50 100 ms

0.1 — %

H1902

°C

AH1902

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Magnetic Characteristics (Note 9 &10) (T

Symbol Characteristics Test Condition Min Typ Max Unit

Bops (south pole to part marking side)

Operation Point

Bopn (north pole to part marking side)

Brps (south pole to part marking side)

Brpn (north pole to part marking side)

Bhy (|Bopx|-|Brpx|) Hysteresis - 10 -

Notes: 9. Typical data is at TA = +25°C, VDD = 1.8V.

NEW PRODUCT

10. Maximum and minimum parameters values over operating temperature range are not tested in production, they are guaranteed by design, characterization and process control. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.

= +25°C, VDD = 1.8V, unless otherwise specified)

A

23 33 47

VDD = 1.6V to 3.6V

= -40°C to +85°C

T

A

-47 -33 -24

VDD = 1.6V to 3.6V

= -40°C to +85°C

T

A

12 23 35

VDD = 1.6V to 3.6V

T

= -40°C to +85°C

Release Point

A

VDD = 1.6V to 3.6V

= -40°C to +85°C

T

A

21 33 48

-48 -33 -21

9 23 38

-35 -23 -12

-38 -23 -9

H1902

(1mT=10 Gauss)

Gauss

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Typical Operating Characteristics

60

V

= 1.6V

DD

50 40 30 20 10

0

-10

-20

Gauss (G)

-30

-40

-50

-60

-50-25 0 255075100

Temperature (° C)

Switch Points vs Temperature

60

V

= 3.6V

DD

50 40

NEW PRODUCT

30 20 10

0

-10

-20

Gauss (G)

-30

-40

-50

-60

-50 -25 0 25 50 75 100

Temperature (° C)

Switch Points vs Temperature

10

9

(μA)

8

DD

7

6

5

4

3

2

1

0

-50 -25 0 25 50 75 100

Average Supply Current I

Temperature (°C)

Average Supply Current vs. Temperature

Bops Brps

Bhy

Brpn

Bopn

Bops Brps

Bhy

Brpn

Bopn

3.6V

1.8V

1.6V

H1902

60

V

= 1.8V

DD

50 40 30 20 10

0

-10

-20

Gauss (G )

-30

-40

-50

-60

-50-25 0 255075100

Temperature (° C)

Sw itch Poin ts vs Temperatu re

60

TA= +25 °C

50 40 30 20 10

0

-10

-20

Gauss (G)

-30

-40

-50

-60

1.5 1.8 2.1 2.4 2.7 3 3.3 3.6 3.9

Temperature ( °C)

10

TA= +25°C

9

(μA)

8

DD

7

6

5

4

3

2

1

0

Average Supply Current I

1.5 1.8 2.1 2.4 2.7 3 3.3 3.6 3.9

Sw itch Points vs Temperature

Supply Voltage (V)

Average Supply Current vs. Supply Voltage

Bops Brps

Bhy

Brpn

Bopn

Bops Brps

Bhy

Brpn Bopn

AH1902

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Ordering Information

H1902

Part Number

AH1902-FA-7 FA X1-DFN1216-4 3000/Tape & Reel -7

AH1902-FT4-7 FT4 X2-DFN2015-6 3000/Tape & Reel -7

Package

Code

Marking Information

NEW PRODUCT

(1) Package Type: X1-DFN1216-4 and X2-DFN2015-6

AH1902-FT4-7 X2-DFN2015-6 D2

Packaging

Quantity Part Number Suffix

7” Tape and Reel

Part Number Package Identification Code

AH1902-FA-7 X1-DFN1216-4 F2

AH1902

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Package Outline Dimensions (All dimensions in mm.)

Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.

(1) Package Type: X1-DFN1216-4

A

3

A

1

Seating Plane

2

L

NEW PRODUCT

D

e

Pin #1 ID

︵

E

︶

Z

Bottom View

D

C'0.2x45°

2

E

b

H1902

X1-DFN1216-4

Dim Min Max Typ

A 0.47 0.53 0.50 A1 0.00 0.05 0.02 A3 -- -- 0.13

b 0.15 0.25 0.20

D 1.15 1.25 1.20 D2 0.75 0.95 0.85

E 1.55 1.65 1.60 E2 0.55 0.75 0.65

e - - 0.65

L 0.20 0.30 0.25

Z - - 0.175

All Dimensions in mm

AH1902

Document number: DS36533 Rev. 2 - 2

Sensor Location

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Package Outline Dimensions (cont.) (All dimensions in mm.)

Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.

(2) Package Type: X2-DFN2015-6

NEW PRODUCT

A

Pin #1 ID

︵

E

z

1

A

1

z

R

0

.

2

0

︶

Bottom View

A

3

Seating Plane

D

2

e

Pin# 1

E

2

b

L

Top View

Hall Sensor

PART MARKING SURFACE

H1902

X2-DFN2015-6

Dim Min Max Typ

A 0.375 0.40 0.390 A1 0 0.05 0.02 A3 - - 0.13

b 0.20 0.30 0.25

D 1.45 1.575 1.50 D2 1.00 1.20 1.10

e - - 0.50

E 1.95 2.075 2.00 E2 0.70 0.90 0.80

L 0.25 0.35 0.30

Z - - 0.125 Z1 - - 0.075

All Dimensions in mm

Min/Max

Die

AH1902

Document number: DS36533 Rev. 2 - 2

0.97/1.04

Sensor Location

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Suggested Pad Layout

Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.

(1) Package Type: X1-DFN1216-4

X

1

C

(2) Package Type: X2-DFN2015-6

NEW PRODUCT

Y

2

X

2

X

Y

1

C

Y

1

Y

X

Y

2

X1-DFN1216-4

Dimensions Value

C 0.65 X 0.25

X1 0.90

Y 0.50 Y1 0.70 Y2 2.00

All Dimensions in mm

X2-DFN2015-6

Dimensions Value

C 0.500

X 0.350 X1 1.150 X2 1.350

Y 0.500 Y1 0.850 Y2 2.150

All Dimensions in mm

X

1

H1902

AH1902

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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 LAWS 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 product 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 website, harmless against all damages.

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim 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 foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks.

This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated.

NEW PRODUCT

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

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

B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness.

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices 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 products in such safety-critical, life support devices or systems.

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

IMPORTANT NOTICE

LIFE SUPPORT

H1902

AH1902

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