Diodes AH1810 User Manual

HIGH SENSIVITY MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH

Description

The AH1810 is a high sensitivity micropower Omnipolar Hall effect switch IC with internal pull up and pull down capability. Designed for portable and battery powered equipment such as cellular phones and portable PCs, the average supply current is only 6µA at 3V. To support potable equipment the AH1810 can operate over the supply range of 2.3V 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 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). 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.

H1810

Pin Assignments

Features

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 Omnipolar Operation (North or South Pole)  Supply Voltage of 2.3V to 3.6V  High Sensitivity  Micropower Operation  Chopper Stabilized Design Provides:

 Superior Temperature Stability  Extremely Low Switch-Point Drift  Enhanced Immunity to Stress

 No External Pull up Resistor Required  Good RF Noise Immunity  -40°C to +85°C Operating Temperature  Industry Standard SC59 Package  Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)  Halogen and Antimony Free. “Green” Device (Note 3)

Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.

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.

Applications

 Cover or Display Switch in Portable PCs  Open and Close Detect for Cellular Phones  Holster Detect for Cellular Phones and Tablet PCs  Digital Still and Video Cameras  Contact-Less Switches

Typical Applications Circuit (Note 4)

Note: 4. C

is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF to 100nF.

AH1810

Document number: DS35743 Rev. 2 - 2

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Pin Descriptions

Package: SC59

Number

1 VDD Power Supply Input 2 GND Ground Pin 3 OUTPUT Output Pin

Name

Functional Block Diagram

H1810

Function

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AH1810

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H1810

Absolute Maximum Ratings (Note 5) @T

Symbol Characteristics Values Unit

VDD Supply Voltage (Note 6) 6 V

DD_REV

OUTPUT

B Magnetic Flux Density Unlimited PD Package Power Dissipation SC59 270 mW Ts Storage Temperature Range +150 °C

TJ Maximum Junction Temperature 150 °C

ESD HBM Human Body Model ESD capability 8 kV

Notes: 5. 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.

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

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Recommended Operating Conditions (@T

Symbol Characteristic Conditions Rating Unit

VDD Supply Voltage Operating 2.3 to 3.6 V

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

Electrical Characteristics (@T

Symbol Characteristic Conditions Min Typ Max Unit

VOL Output Low Voltage (on) I VOH Output High Voltage (off) I Ioff Output Leakage Current Vout=3.6V, B < Brps

IDD(awake)

(sleep) During ‘sleep’ period — 2.5 — µA

IDD(avg) IDD(avg) VDD = 3.6V Tawake Awake Active Pulse Width (Note 7)

Tperiod Awake Period (Note 7)

D.C. Duty Cycle

Note: 7. 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).

Reverse Supply Voltage -0.3 V Output current (source and sink) 2 mA

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

= +25°C, VDD = 2.3V to 3.6V, unless otherwise specified.)

Supply Current

Average Supply Current

= +25°C, unless otherwise specified.)

= 1mA — 0.1 0.2 V

OUT

= -1mA V

OUT

During ‘awake’ period

= 3.0V — 6 10 µA

-0.2 V

— —

— — — —

-0.1 — V

<0.1 1 µA

2.1

7.3 13 µA 50 100 µs 50 100 ms

0.1 — %

—

AH1810

Document number: DS35743 Rev. 2 - 2

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August 2013

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