Diodes AH1806 User Manual

HIGH SENSIVITY MICROPOWER

OMNIPOLAR HALL-EFFECT SWITCH

Description

The AH1806 is a high-sensitivity, micro power Omnipolar Hall Effect

switch IC designed for portable and battery powered consumer

equipment such as cellular phones, PDA’s and portable PC’s to home

appliance and industrial applications such as smart meter magnetic

tamper detection. Based on two sensitive Hall Effect plates and a

copper stabilized architecture the AH1806 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 2.5V to 5.5V and consumes only 24µW with a supply

of 3V.

The single open drain output can switched on with either a North or

South pole of sufficient field strength. When the magnetic flux density

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

output is switched on (pulled low). The output is turned off when

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B becomes lower than the release point (Brp). The output will remain

off when there is no magnetic field.

Features

• Omnipolar (North or South Pole) Operation

• High Sensitivity

• Single Open Drain Output

• Micropower Operation

• 2.5V to 5.5V Operating Range

• Chopper Stabilized Design Provides:

 Superior Temperature Stability

 Minimal Switch Point Drift

 Enhanced Immunity to Stress

• Good RF Noise Immunity

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

• ESD (HBM) > 6KV

• Small Low Profile SOT553 and Industry Standard SC59 Packages

• 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.

Pin Assignments

(Top View)

SC59

(Top View)

SOT553

Applications

• Cover Switch in Clam-Shell or Slide Type Cellular Phones

• Display Switch for Portable PCs

• On/Off Switch for PDAs and Digital Cameras

• Contact-Less Switch in Consumer Products

• Smart-Emeters

• Position, Proximity and Level Detection Contact-Less Switch in

Home Appliances and Industrial Applications

H1806

AH1806

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Typical Applications Circuit

H1806

Note: 4. C R

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

is the pull-up resistor, the recommended resistance is 10kΩ to 100kΩ.

Pin Descriptions

Package: SC59

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Number

2 GND Ground

3 OUTPUT Output

Package: SOT553

Number

1 NC No Connection (Note 5)

2 GND Ground

3 NC No Connection (Note 5)

5 OUTPUT Output

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

Name

Power Supply Input

Functional Block Diagram

Function

AH1806

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Cancellation

Offset

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H1806

Absolute Maximum Ratings (Note 6) @T

= +25°C, unless otherwise specified.)

Symbol Characteristics Values Unit

VDD

OUT

DD REV

OUT_REV

OUTPUT

Supply Voltage (Note 7) 7 V

Output Pin Voltage (Note 7) 7 V

Reverse Supply Voltage -0.3 V

Reverse Output Pin Voltage -0.3 V

Output current (source and sink) 2.5 mA

B Magnetic Flux Density Unlimited

Package Power Dissipation SC59 and SOT553 230 mW

Ts Storage Temperature Range -65 to +150 °C

Maximum Junction Temperature 150 °C

ESD HBM Human Body Model ESD capability 6 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 device at the absolute maximum rated conditions for any period of time.

of 7V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate the

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Recommended Operating Conditions (@T

= +25°C, unless otherwise specified.)

Symbol Characteristic Conditions Rating Unit

VDD

OUT_MAX

Supply Voltage Operating 2.5 to 5.5 V

Maximum Output Pin Voltage Operating 5.5 V

Operating Temperature Range Operating -40 to +85 °C

Electrical Characteristics (@T

= +25°C, V

= 3V, unless otherwise specified.)

Symbol Characteristic Conditions Min Typ Max Unit

Output On Voltage (VOL) I

OUT_ON

Ioff Output Leakage Current

IDD(awake)

Supply Current

IDD(sleep)

IDD(avg)

Average Supply Current

= 1mA

OUT

= 5.5V, Output off

OUT

During ‘awake’ period,

= 25°C, VDD = 3V

During ‘awake’ period,

= -40 to +85°C, VDD = 2.5V to 5.5V

During ‘sleep’ period, T

= +25°C, VDD = 3V

During ‘sleep’ period, T

= -40 to +85°C, VDD = 2.5V to 5.5V

= +25°C, VDD = 3V

TA = -40 to +85°C, VDD = 2.5V to 5.5V

— 0.1 0.3 V

— < 0.1 1 µA

— 3 6 mA

— 3 12 mA

— 5 10 µA

— — 28 µA

— 8 16 µA

— — 40 µA

Tawake Awake Time (Note 8) — 75 125 µs

Tperiod Period (Note 8) — 75 125 ms

D.C. Duty Cycle — 0.1 — %

Note: 8. When power is initially turned on, the operating VDD must be within its correct operating range (2.5V to 5.5V) to guaranteed the output sampling. The output state is valid after the second operating cycle (typical 150ms).

AH1806

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