Diodes AH1891 Manuel d'utilisateur télécharger pdf

AH1891

MINIATURE MICROPOWER OMNIPOLAR

HALL EFFECT SWITCH

AH1891

Document number: DS35207 Rev. 1 - 2

1 of 7

www.diodes.com

April 2011

NEW PRODUCT

Description

The AH1891 is a miniature micropower Omnipolar Hall effect

switch IC with dual outputs specifically designed for portable

and battery powered equipment such as cellular phones and

portable PCs. To support battery powered equipment the

AH1891 has been optimized to operate over the supply range

of 1.8V to 3.3V and uses a sleep function to give an average

supply current of only 7uA. To minimize PCB space the

AH1891 is packaged in the small CSP package

(0.8mmx0.8mm) and the design integrates the external pull

up resistors to simplify the applications circuit.

The outputs of the AH1891 are switched with either a North or

South pole of sufficient strength. When the magnetic flux

density (B) is larger than operate point (Bop), Output 1 will

pull low and Output 2 will be inverted (high). The output states

are held until B is lower than release point (Brp).

The AH1891 is available in U-WLB0808-4 package.

Features

• Omnipolar (North or South) operation

• Low supply voltage of 1.8V to 3.3V

• Micropower operation

• Dual outputs for design flexibility

• Internal pull up and pull down capability

• Chopper stabilized design for:

o Superior temperature stability

• Good RF noise immunity

• -40°C to 85°C Operating Temperature

• ESD ＞ 4KV in Human Body Mode

• Miniature CSP package 0.8mm x 0.8mm

Pin Assignments

A1 A2

B1 B2

(Top View)

A2 A1

B2 B1

(Bottom View)

Applications

• Cellular phones

• Portable PCs and PDAs

• Digital cameras

• Portable and battery powered applications

Typical Application Circuit

AH1891

Output 1

GND

Output 2

Vdd

1 2 3 4 5 6 7

Résumé du contenu

Page 1 - Output 2

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Page 2 - Cancelling

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Page 4 - Temper ature(

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Page 5 - 7 : Tape & Reel

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Page 6 - Land Pattern Recommendation

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