Datasheet > AH1897S

AH1897S

更新时间： 2023-12-06 20:08:14

品牌	Logo	应用领域
美台 - DIODES		/
页数	文件大小	规格书
8页	471K
描述
Micropower Omnipolar Hall Effect Switch

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AH1897S 数据手册

AH1897S

HIGH SENSITIVITY MICROPOWER

OMNIPLOAR HALL-EFFECT SWITCH

Description

Pin Assignments

The AH1897S 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 AH1897S can operate over the

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

to minimize the power consumption. To minimize PCB space, the

AH1897S is available in a small low profile X1-DFN1216-4 (Type B)

package.

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

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

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

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

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

off when there is no magnetic field.

X1-DFN1216-4 (Type B)

Applications

Features



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



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 B) Package

Moisture Sensitivity: Level 1 per J-STD-020

Terminals: Finish NiPdAu over Copper Leadframe, Solderable

per MIL-STD-202, Method 208



Weight: 0.002 grams (Approximate)

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)

For automotive applications requiring specific change

control (i.e. parts qualified to AEC-Q100/101/200, PPAP

capable, and manufactured in IATF 16949 certified

facilities), please contact us or your local Diodes

representative.

https://www.diodes.com/quality/product-definitions/

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.

1 of 8

www.diodes.com

February 2020

AH1897S

Document number: DS37559 Rev. 2 - 2

12 3 4 5 6 7 8

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