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AH1804

MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH

AH1804

Document number: DS35314 Rev. 2 - 2

1 of 9

www.diodes.com

September 2011

NEW PRODUCT

Description

The AH1804 is a micropower Omnipolar Hall effect switch IC

with a single output driver 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 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).

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

Output

GND

( Top View )

DFN1216-4

1. V

GND 2.

Output

(Top View)

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

AH1804

2.5V to 3.6V

Output

GND

Cin

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

1 2 3 4 5 6 7 8 9

Résumé du contenu

Page 1 - DFN1216-4

AH1804MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH AH1804 Document number: DS35314 Rev. 2 - 2 1 of 9 www.diodes.com September 2011 © Diodes Incor

Page 2 - AH1804

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Page 4 - = 3.3V, Note 6)

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Page 5 - Typical Characteristics

AH1804MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH AH1804 Document number: DS35314 Rev. 2 - 2 5 of 9 www.diodes.com September 2011 © Diodes Incor

Page 6

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Page 7 - Bottom View

AH1804MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH AH1804 Document number: DS35314 Rev. 2 - 2 7 of 9 www.diodes.com September 2011 © Diodes Incor

Page 8 - Taping Orientation (Note 10)

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Page 9

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