Datasheet > AH1891

AH1891

更新时间： 2022-10-09 13:55:22

品牌	Logo	应用领域
美台 - DIODES		开关
页数	文件大小	规格书
7页	248K
描述
MINIATURE MICROPOWER OMNIPOLAR HALL EFFECT SWITCH

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AH1891 数据手册

AH1891

MINIATURE MICROPOWER OMNIPOLAR

HALL EFFECT SWITCH

Description

Pin Assignments

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.

(Top View)

(Bottom View)

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

Applications

•

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:

•

Cellular phones

Portable PCs and PDAs

Digital cameras

Portable and battery powered applications

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

Typical Application Circuit

Output 1

Output 2

Vdd

AH1891

GND

1 of 7

www.diodes.com

April 2011

AH1891

Document number: DS35207 Rev. 1 - 2

12 3 4 5 6 7

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