Diodes AH1889 User Manual

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HIGH SENSIVITY DUAL UNIPOLAR HALL-EFFECT SWITCH

Description

AH1889 is a high sensitivity dual output Unipolar Hall effect IC which

can detect either a North or South pole independently and switch one

of its two outputs with internal pull up and pull down capability. The

AH1889 is mainly designed for low voltage applications which require

a quick response time and can operate over the supply voltage of

1.65V to 3.6V. To minimize PCB space AH1889 outputs have internal

pull up and pull down capability and is packaged in a small low profile

SOT553 package.

A South pole of sufficient strength will turn OUTPUT1 on and a North

pole of sufficient strength with turn on OUTPUT2. While the magnetic

flux density (B) perpendicular to the package is larger than operate

point Bops or Bopn, the appropriate output will be turned on (pulled

low), the output is held until B is lower than release point Brps or

Brps, then turned off (high). The outputs will be turned off and will

remain off when there is no magnetic field.

Features

 Two Monolithic Unipolar Hall Effect Sensor Switch

NEW PRODUCT

 Operation with a South Pole (OUTPUT1)

 Operation with a North Pole (OUTPUT2)

 Supply Voltage of 1.65V to 3.6V

 Quick Response Time Without Sleep Mode

 Chopper Stabilized Design Provides:

 Superior Temperature Stability

 Extremely low Switch-Point Drift

 Enhanced immunity to physical stress

 Good RF Noise Immunity

 -40°C to +85°C Operating Temperature

 ESD (Human Body Model) >4kV

 Small and Low Profile SOT553 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) compliant.

2. See http://www.diodes.com/quality/lead_free.html 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.

Pin Assignments

(Top View)

SOT553

Applications

 Position and proximity detection for consumer, office equipments

and industrial applications

 Open and close detect switches for home appliances

 Door, lids, tray position detect switches

 Magnetic field direction detection

 Contact-less switches for consumer and industrial applications

H1889

Typical Applications Circuit

Note: 4. C

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

AH1889

Document number: DS36256 Rev. 1 - 2

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Pin Descriptions

Package: SOT553

Number

1 OUTPUT2 North Pole Setecting Output Pin (active low)

2 GND Ground

3 NC No Connection (Note 5)

5 OUTPUT1 South Pole Detecting Output Pin (active low)

Note: 5. NC is “No Connection” pin and is not connected internally. This pin can be left open or tied to ground.

Name

Power Supply Voltage

Function

Functional Block Diagram

H1889

NEW PRODUCT

Absolute Maximum Ratings (Note 6) (@T

Symbol Characteristics Values Unit

VDD

DD_REV

OUTPUT

B Magnetic Flux Density Unlimited

Ts Storage Temperature Range -65 to +150

ESD Human Body Model ESD capability 4 kV

Notes: 6. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time.

7. The absolute maximum V device at the absolute maximum rated conditions for any period of time.

AH1889

Document number: DS36256 Rev. 1 - 2

Supply Voltage (Note 7) 5 V

Reverse Supply Voltage -0.3 V

Output current (source and sink) 1 mA

Package Power Dissipation SOT553 230 mW

Maximum Junction Temperature 150

Cancelling

Offset

Cancelling

Offset

= +25°C, unless otherwise specified.)

of 6V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate the

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C

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Recommended Operating Conditions (@T

Symbol Characteristic Conditions Rating Unit

VDD

Electrical Characteristics (Note 8) (@T

Symbol Characteristic Conditions Min Typ Max Unit

VOH

VOL

IDD

Note: 8. When power is initially turned on, the operating VDD (1.65V to 3.6V) must be applied to guaranteed the output.

Supply Voltage Operating 1.65 to 3.6 V

Operating Temperature Range Operating -40 to +85 °C

= +25°C, VDD = 1.8V, unless otherwise specified.)

OUTPUT1 and OUTPUT2 High Voltage (off)

OUTPUT1 and OUTPUT2 Low Voltage (on)

Supply Current

Magnetic Characteristics (Note 9, 10, 11) (@T

= +25°C, unless otherwise specified.)

= -0.5mA V

OUT

= 0.5mA

OUT

= 1.8V Outputs Off

VDD = 3.6V Outputs Off

= +25°C, VDD = 1.8V, unless otherwise specified.)

NEW PRODUCT

Output Symbol Characteristic Min Typ Max Unit

OUTPUT1

OUTPUT2

Notes: 9. Typical data is at TA = +25°C, VDD = 3V, and for design information only.

Bops (South pole to part marking side) Operation Point — 35 50

Brps (South pole to part marking side) Release point 6 20 —

Bopn (North pole to part marking side) Operation Point -50 -35 —

Brpn (North pole to part marking side) Release point — -20 -6

Bhy (|Bopx|-|Brpx|) Hysteresis — 8 —

10. Bops and Brps for OUTPUT1 pin responds to South pole only; Bopn and Brpn for OUTPUT2 pin responds to North pole only.

11. Magnetic characteristics may vary with operating temperature and after soldering.

H1889

-0.2

— 0.1 0.2 V

— 2.1 — mA

— 5 — mA

— — V

(1mT=10 Gauss)

Gauss

( Output Voltage )

AH1889

Document number: DS36256 Rev. 1 - 2

( Output Voltage )

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Typical Operating Characteristics

H1889

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= 1.8V

-10

Gauss (G)

-20

-30

-40

-50

-50 -25 0 25 50 75 100

Temperature (°C)

Switch Points vs Temperature

= 3.3V

-10

Gauss (G)

-20

-30

-40

-50

-50 -25 0 25 50 75 100

Temperature (°C)

Switch Points vs Temperature

Bops

Brps Bhy

Brpn

Bopn

Bops

Bhy Brps

Brpn

Bopn

= 3.0V

-10

Gauss (G)

-20

-30

-40

-50

-50 -25 0 25 50 75 100

Temperature (°C)

Switch Points vs Temperature

TA = +25 °C

-10

Gauss (G)

-20

-30

-40

-50

1.5 1.8 2.1 2.4 2.7 3 3.3 3.6 3.9

Supply Voltage (V)

Switch Points vs Supply Voltage

Bops

Bhy Brps

Brpn

Bopn

Bops

Bhy Brps

Brpn

Bopn

Supply Current IDD (mA)

-50 -25 0 25 50 75 100

Temperatur e (°C)

Supply Current vs. Temperature

AH1889

Document number: DS36256 Rev. 1 - 2

(mA)

3.6V

Current I

1.8V

1.65V

Supply

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TA = +25 °C

1.5 1.8 2.1 2.4 2.7 3 3.3 3.6 3.9

Supply Voltage (V)

Supply Current vs. Supply Voltage

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Thermal Performance Characteristics

(C)

PD (mW)

25 50 60 70 80 85 90 100 110 120 130 140 150

230 184 166 147 129 120 110 92 74 55 37 18 0

300

H1889

NEW PRODUCT

Ordering Information

Part Number Package Code Packaging

AH1889-Z-7 Z SOT553 3000/Tape & Reel -7

Marking Information

(1) Package Type: SOT553

(mW)

Power Dissipation, P

200

100

0 25 50 75 100 125 150

-40-40-40-40

Ambient Temperature TA(°C)

Power Dissipation Curve

7” Tape and Reel

Quantity Part Number Suffix

AH1889

Document number: DS36256 Rev. 1 - 2

Part Number Package Identification Code

AH1889 SOT553 KX

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Package Outline Dimensions (All dimensions in mm.)

Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.

(1) Package Type: SOT553

NEW PRODUCT

E1/2

R0.1 MAX.

TYP.

E/2

b (5x)

TYP.

L (5x)

H1889

SOT553

Dim Min Max Typ

A 0.55 0.62 0.60 b 0.15 0.30 0.20 c 0.10 0.18 0.15 D 1.50 1.70 1.60 E 1.55 1.70 1.60

E1 1.10 1.25 1.20

e 0.50 BSC

e1 1.00 BSC

F 0.00 0.10 –– L 0.10 0.30 0.20 a 6° 8° 7°

All Dimensions in mm

0.55/0.70

Sensor Location

Suggested Pad Layout

Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.

(1) Package Type: SOT553

Dimensions Value (in mm)

Z 2.2

G 1.2 X 0.375 Y 0.5

C1 C2

0.23/0.37

0.10/0.18

1.7

0.5

AH1889

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DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages.

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.

Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks.

This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated.

NEW PRODUCT

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:

A. Life support devices or systems are devices or systems which:

1. are intended to implant into the body, or

labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness.

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.

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2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the

IMPORTANT NOTICE

LIFE SUPPORT

H1889

AH1889

Document number: DS36256 Rev. 1 - 2

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