Datasheet > AH1898

AH1898

更新时间： 2024-11-28 12:51:51

品牌	Logo	应用领域
美台 - DIODES		/
页数	文件大小	规格书
11页	517K
描述
Omnipolar Operation

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AH1898 数据手册

AH1898

PROGRAMMABLE MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH

Description

Pin Assignments

The AH1898 is a micropower magnetic range selectable (Bop/Brp)

Omnipolar Hall effect switch IC with internal pull up and pull down

capability, designed for portable and battery powered consumer

equipment such as cellular phones and portable PCs. To support

battery powered equipment and low voltage microcontrollers, the

AH1898 can operate over the supply range of 1.6V to 3.6V and uses

a hibernating clocking system to minimize the power consumption.

The average supply current is only 4.3µA typical at 1.80V. The

AH1898 has an 8kV ESD rating on the supply and output pins. To

minimize PCB space the AH1898 is packaged in the small

CSP package (0.81mm x 0.81mm typical).

(Top View)

(Bottom View)

The output is activated with either a north or south pole of sufficient

magnetic field strength. The user can select one of two magnetic

sensitivity bands via the BSEL pin without the addition of any external

components allowing a flexible but small solution. The band select

can be hardwired or be changed on the fly via a logic source such as

a micro-controller. When the magnetic flux density (B) perpendicular

to the package 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 output will remain off when there is no magnetic field.

U-WLB0808-4

Applications

Features



Open and Close Detect for Cellular Phones

Holster or Cover Detect for Cellular Phones and Tablet PCs

Cover or Display Switch in Portable PCs



Omnipolar Operation (North or South pole)

Programmable Operate and Release Points

Supply Voltage of 1.6V to 3.6V

Digital Still, Video Cameras and Handheld Gaming Consoles

Proximity and Position Switches

Micropower Operation

Chopper Stabilized Design Provides

Superior Temperature Stability

Minimal Switch Point Drift

Enhanced Immunity to Physical Stress



No External Pull-up Resistors Required

Good RF Noise Immunity

-40°C to +85°C Operating Temperature

8kV Human Body Model ESD Capability

Miniature U-WLB0808-4 (CSP 0.81mm x 0.81mm typical)

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 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.

1 of 11

www.diodes.com

February 2013

AH1898

Document number: DS36028 Rev. 1 - 2

12 3 4 5 6 7...11

中文翻译

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与AH1898相关器件

型号	品牌	获取价格	描述	数据表
AH19	ETC	获取价格	Analog IC
AH1902	DIODES	获取价格	HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH
AH1902_16	DIODES	获取价格	HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH
AH1902-FA-7	DIODES	获取价格	Hall Effect Sensor, 0.9mT Min, 4.8mT Max, 0.20-1.60V, Rectangular, Surface Mount, 1.20 X 1
AH1902-FT4-7	DIODES	获取价格	HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH
AH1902-Z-7	DIODES	获取价格	HIGH SENSITIVITY MICROPOWER OMNIPLOAR HALL-EFFECT SWITCH
AH1903	DIODES	获取价格	Selectable Unipolar/Omnipolar Micropower Hall Effect Switch
AH1903-FA-7	DIODES	获取价格	Hall Effect Sensor, 0.9mT Min, 4.8mT Max, 0.2-1.6V, Rectangular, Surface Mount, 1.20 X 1.6
AH1911	DIODES	获取价格	Micropower Omnipolar Hall Effect Switch
AH1912	DIODES	获取价格	Micropower Omnipolar Hall Effect Switch

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