Diodes AH1804 User Manual

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AH1804

MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH

Description

The AH1804 is a micropower Omnipolar Hall effect switch IC with a single output driver with internal pull up a nd pull down capability. Designed for portable and battery powered equipment such as cellular phones and portable PCs the average supply current is only 12µA at 3.3V. To support battery powered equipment the AH1804 can operate over the supply range of 2.5V to 3.6V and uses a hibernating clocking system to minimize the power consumption.

The output is activated with either a north or south pole of sufficient strength. When the magnetic flux density (B) is larger than operate point (Bop), the output will be turned on (pulled low) and held until B is lower than release point (Brp).

NEW PRODUCT

The AH1804 is available in SC59 and small low profile DFN1216-4 packages.

Features

• Omnipolar operation (North or South pole)

• Low supply voltage 2.5V to 3.6V

• Micropower operation

• No external pull up resistors required

• Chopper stabilized design

o Superior temperature stability o Extremely Low Switch-Point Drift o Insensitive to Physical Stress

• Good RF noise immunity

• -40°C to 85°C operating temperature

• Small low profile DFN1216-4 and SC59 packages

• ESD (HBM) ＞ 5KV

• “Green” Molding Compound

Pin Assignments

( Top View )

GND

Output

DFN1216-4

(Top View)

Output

GND 2.

1. V

SC59

Applications

• Cover switch in clam-shell and slide cellular phones

• Cover switch in portable PC’s, Tablets and PDA

• Display screen open/close detect in Digital

camcorders

• Contact-less switch in portable battery powered consumer and industrial products

Typical Application Circuit

Note: Cin is for power stabilization and to strengthen the noise immunity, C = 100nF or higher must be used.

AH1804

Document number: DS35314 Rev. 2 - 2

Cin

2.5V to 3.6V

AH1804

GND

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Output

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MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH

Pin Descriptions

Pin Name P/I/O Description

VDD

GND P/I Ground

Output O Output Pin

NC NC No Connection (Note 1)

Notes: 1. NC is “No Connection” which is not connected internally. This pin can be left open or tied to ground.

P/I Power Supply Input

Functional Block Diagram

AH1804

NEW PRODUCT

Sleep/Awake Logic

and Power Switch

Hall

Plate

Hall

Plate

Cancellation

Offset

Amp

Offset

Amp

Latch

Output

Driver

Controller

Output

GND

AH1804

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AH1804

MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH

Absolute Maximum Ratings (T

Symbol Characteristics Values Unit

VDD

DD rev

B Magnetic flux density Unlimited

Ts Storage Temperature Range -65 to +150 °C PD

Notes: 2. 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.

3. The absolute maximum of 5V is a transient stress rating and is not meant as functional operating conditions. It is not recommended to operate the device at the absolute maximum rated conditions for any period of time.

NEW PRODUCT

Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time

Supply voltage (Note 3) 5.0 V Reverse supply voltage -0.3 V

Package Power Dissipation Maximum Junction Temperature 150 °C

Recommended Operating Conditions (T

Symbol Characteristics Conditions Rating Unit

VDD

Notes: 4. Decoupling capacitor CIN = 100nF or higher must be used for full 2.5V to 3.6V supply range.

Supply Voltage Operating Temperature Range Operating -40 to +85 °C

= 25°C, Note 2)

DFN1216-4 230 SC59 270

= 25°C)

CIN =0.1µF (Note 4)

2.5 to 3.6 V

Electrical Characteristics (T

Symbol Characteristics Conditions Min Typ. Max Unit

VOL

VOH

Idd(en)

Idd(dis) Chip disable ⎯ 8 ⎯ µA

Idd(avg) Average supply current, ⎯ 12 ⎯ µA

Tawake Awake Time (Note 5) ⎯ 50 100 µs Tperiod Period (Note 5) ⎯ 50 100 ms

D.C. Duty Cycle ⎯ 0.1 ⎯ %

Notes: 5. When power is initially on, the operating VDD (2.5V to 3.6V) must be applied to be guaranteed for the output sampling. The output state is valid after the second operating phase (typical 100ms).

Output Low Voltage (on) Output High Voltage (off)

upply current

= 25°C, V

OUT

Chip enable ⎯ 4 ⎯ mA

= 3.3V, unless otherwise specified)

= 1mA = -1mA VDD-0.2 VDD-0.1

⎯ 0.1 0.2 V

⎯⎯ V

AH1804

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AH1804

MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH

Magnetic Characteristics (T

(1mT=10 Gauss)

Symbol Characteristics Min Typ. Max Unit

Bops(south pole to brand side) Bopn(north pole to brand side) -60 -40 -20 Brps(south pole to brand side) Brpn(north pole to brand side) - -32 -15 Bhy (|Bopx|-|Brpx|) Hysteresis 8 -

Notes: 6. The magnetic characteristics may vary with operating temperature and after soldering.

= 25°C, V

Operation Point

Release Point

Output

= 3.3V, Note 6)

20 40 60

15 32 -

Output

NEW PRODUCT

( off-state )

Vcc

Turn on

( Output Voltage )

Bhy

Turn off

( Output Voltage )

( off-state )

Gauss

Vcc

Bhy

Turn on

( on-state )

Vsat

Bopn Brpn 0

( Magnetic flux density B )

Vsat

Brps Bops0

( Magnetic flux density B )

( on-state )

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Typical Characteristics

Typical Switch Point Bop and Brp vs. Temperature

NEW PRODUCT

AH1804

MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH

Typical Switch Points Bop and Brp vs. Supply Voltage

Average Supply Current vs. Temperature

Average Supply Current vs. Supply Voltage

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Ordering Information

AH1804

MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH

AH1804 - XX - 7 X

Package

FA : DFN1216-4

Packing

7 : Tape & Reel

W : SC59

Device

(Note 8)

AH1804-FA-7 FA DFN1216-4 3000/Tape & Reel -7 -Blank

NEW PRODUCT

AH1804-W-7 W SC59 3000/Tape & Reel -7 -Blank

Notes: 7. Please refer the Magnetic Characteristics table.

8. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html.

http://www.diodes.com/datasheets/ap02001.pdf

9. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

Package

Code

Packaging

(Note 9)

Quantity Part Number Suffix

7” Tape and Reel Magentic

Magentic

Characteristics

- Blank : Option 1 (Note 7)

Marking Information

(1) DFN1216-4

( Top View )

: Identification C ode

Pin 1 indicator

Y : Year : 0~9

: Week : A ~Z : 1 ~26 wee k ;

a~z : 27~52 week; z represents

52 and 53 week

: Inter n a l c o d e

Part Number Package Identification Code

AH1804-FA-7 DFN1216-4 KJ

(2) SC59 (commonly known as SOT23 in Asia)

( Top View )

Characteristics

(Note 7)

AH1804

Document number: DS35314 Rev. 2 - 2

XX : Identification code

: Year 0 to 9 : Week : A to Z : 1 to 26 week;

XX Y W

a to z : 27 to 52 week; z represents

52 and 53 week

: Internal code

Part Number Package Identification Code

AH1804-W-7 SC59 WJ

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MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH

Package Outline Dimensions (All Dimensions in mm)

(1) Package type: DFN1216-4

AH1804

2X-

Pin#1

C0.2

0.55/0.75

Top Mark

Side View

0.25

1.15/1.25

0.65Typ.

Hall sensor

0.75/0.95

0.15/0.25

NEW PRODUCT

2X-

0.10 C

0.47/0.53

0.08 C

1.55/1.65

0.25

0.175(4x)

Bottom View

(2) Package Type: SC59 (commonly known as SOT23 in Asia)

(4x)

0.13Typ.

0/0.05

Seating Plane

0.2/0.3(4x)

0.10

0.65Typ.

0.35(4x) C

0.25(4x)

1.0

Top View

Land Pattern Recommendation

(Unit:mm)

0.8

1.40

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Taping Orientation (Note 10)

DFN1216-4

AH1804

MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH

NEW PRODUCT

Notes: 10. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf.

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NEW PRODUCT

AH1804

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.

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 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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MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH

IMPORTANT NOTICE

LIFE SUPPORT

AH1804

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