Diodes AH1803 User Manual

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AH1803

MICROPOWER, ULTRA-SENSITIVE HALL EFFECT

SWITCH

Features

• Micropower operation

• Operation with North or South Pole

• 2.4 to 5.5V battery operation

• Chopper Stabilized

• Superior temperature stability

• Extremely Low Switch-Point Drift

• Insensitive to Physical Stress

• Good RF noise immunity

• -40°C to 85°C operating temperature

• Low profile 3 pin SC59 (commonly known as SOT23 in

Asia) and DFN2020-6 package

• ESD (HBM) ＞ 4KV for DFN2020-6

• SC59 (commonly known as SOT23 in Asia) and

DFN2020-6: Available in “Green” Molding Compound (No Br, Sb)

• Lead Free Finish/ RoHS Compliant (Note 1)

Applications

• Cellular phone

• PDA

• Cordless phone

General Description

AH1803 is with two Hall effect plates and a CMOS output driver, mainly designed for battery–operation, hand-held equipment (such as Cellular and Cordless Phone, PDA). The total operation power is down to 24uW in the 3V supply.

Either North or South Pole of sufficient strength will turn the output on. The output will be turned off under no magnetic field. While the magnetic flux density (B) is larger than operate point

(Bop), the output will be turned on (low), the output is held until B is lower than release point (Brp), then turned off (High).

Typical Circuit

2.4~5.5V

C*

AH1803

GND

C is for power stabilization and to strengthen the noise immunity, the

*

recommended capacitance is 10nF~100nF.

Output

AH1803 Rev. 9 1 of 9 OCTOBER 2009 DS31193 www.diodes.com © Diodes Incorporated

Ordering Information

AH1803

MICROPOWER, ULTRA-SENSITIVE HALL EFFECT

SWITCH

AH1803 - XX G - 7

Package

W : SC59

Green

G : Green

SN : DFN2020-6

Product

AH1803-WG-7 W SC59 3000/Tape & Reel -7 AH1803-SNG-7 SN DFN2020-6 3000/Tape & Reel -7

Notes: 1. EU Directive 2002/95/ EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/datasheets/ap02001.pdf

http://www.diodes.com/products/lead_free.html

2. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at

Pin Assignments

(1) SC59 (commonly known as SOT23 in Asia) (2) DFN2020-6

Package

Code

Packaging

(Note 2)

.

Quantity Part Number Suffix

( Top View )

Packing

7 : Tape & Reel

7” Tape and Reel

( Top View )

5. GND

4. NC6. NC

2. Output

GND 3.

1. Vdd

1. Vdd 2. NC 3. Output

Notes: 3. NC is “No Connection”, which is recommended to be tied to ground.

Pin Descriptions

Pin Name P/I/O Description

Vdd P/I Power Supply Input

GND P/I Ground

Output O Output Pin

NC No Connected

AH1803 Rev. 9 2 of 9 OCTOBER 2009 DS31193 www.diodes.com © Diodes Incorporated

S

Block Diagram

Hall Plate

Cancelling

AH1803

MICROPOWER, ULTRA-SENSITIVE HALL EFFECT

Vdd

Power switch

Offset

Amp

Latch

SWITCH

Logical

Hall Plate

Absolute Maximum Ratings (at T

Symbol Characteristics Values Unit

Vdd Supply voltage 7 V

B Magnetic flux density Unlimited

Ts Storage Temperature Range -65 to +150

PD

Package Power Dissipation

TJ

Maximum Junction Temperature 150

Recommended Operating Conditions ( T

Symbol Parameter Conditions Rating Unit

Vdd

TA Operating Temperature Range Operating -40 to +85

upply Voltage Operating 2.4~5.5 V

Cancelling

Offset

Amp

Latch

= 25°C)

A

SC59 230 mW DFN2020-6 230 mW

= 25°C )

A

Output

GND

°C