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AH1804

Diodes
Part Number AH1804
Manufacturer Diodes
Description MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH
Published May 5, 2014
Detailed Description NEW PRODUCT AH1804 MICROPOWER OMNIPOLAR HALL EFFECT SENSORSWITCH Description The AH1804 is a micropower Omnipolar Hall...
Datasheet PDF File AH1804 PDF File

AH1804
AH1804

Overview
NEW PRODUCT 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 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.
Pin Assignments ( Top View ) GND NC 4 3 1 2 VDD Output DFN1216-4 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.
(Top View) GND 2.
SC59 3.
Output 1 .
VDD 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 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 VDD 2.
5V to 3.
6V Cin AH1804 Output GND 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 1 of 9 www.
diodes.
com September 2011 © Diodes Incorporated NEW PRODUCT AH1804 MICROPOWER OMNIPOLAR HALL EF...


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