Datasheet > AH1897

AH1897

更新时间： 2024-11-29 14:51:07

品牌	Logo	应用领域
美台 - DIODES		/
页数	文件大小	规格书
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描述
Micropower Omnipolar Hall Effect Switch

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AH1897 数据手册

AH1897

HIGH SENSITIVITY MICROPOWER

OMNIPLOAR HALL-EFFECT SWITCH

Description

Pin Assignments

The AH1897 is a high sensitivity micropower Omnipolar Hall effect

switch IC with an 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 4.3µA at 1.85V.

To support portable equipment, the AH1897 can operate over the

supply range of 1.6V to 3.6V and use a hibernating clocking system to

minimize the power consumption. To minimize PCB space, the

AH1897 is available in a small low profile X1-DFN1216-4 (Type D)

package.

(Top View)

V_DD

⁴OUTPUT

GND

X1-DFN1216-4 (Type D)

The output is activated with either a North or South pole of sufficient

magnetic field strength. When the magnetic flux density (B)

perpendicular to the package is larger than operate point (B_OP), the

output will be turned on (pulled low). The output is turned off when

B becomes lower than the release point (B_RP). The output will remain

off when there is no magnetic field.

Applications



Cover or Display Switch in Portable PCs

Open and Close Detect for Cellular Phones

Holster or Cover Detect for Cellular Phones and Tablet PCs

Digital Still, Video Cameras and Handheld Gaming Consoles

Contact-Less Switches

Features



Omnipolar Operation (North or South Pole)

Supply Voltage of 1.6V to 3.6V

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

Small Low Profile X1-DFN1216-4 (Type D) Package

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) & 2015/863/EU (RoHS 3) compliant.

2. See https://www.diodes.com/quality/lead-free/ 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.

Typical Applications Circuit

1.6V to 3.6V

V_DD

OUTPUT

AH1897

C_IN

GND

Note:

4. C_INis for power stabilization and to strengthen the noise immunity, the recommended capacitance is 100nF typical.

1 of 9

www.diodes.com

May 2019

AH1897

Document number: DS36470 Rev. 3 - 2

12 3 4 5 6 7...9

中文翻译

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与AH1897相关器件

型号	品牌	获取价格	描述	数据表
AH1897-FA-7	DIODES	获取价格	Analog Circuit, 1 Func, PDSO4, 1.60 X 1.20 MM, GREEN, DFN-4
AH1897S	DIODES	获取价格	Micropower Omnipolar Hall Effect Switch
AH1898	DIODES	获取价格	Omnipolar Operation
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

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