Diodes AH1809 User Manual

Description

H1809

LOW SENSITIVITY MICROPOWER

OMNIPLOAR HALL-EFFECT SWITCH

Pin Assignments

The AH1809 is a low sensitivity micro power Omnipolar Hall Effect

switch IC designed for battery powered consumer to home appliance

and industrial equipment such smart e-meters. Based on two Hall

Effect plates and a chopper stabilized architecture the AH1809

provides a reliable solution over the whole operating range. To

support battery and low power applications the design has been

optimized to operate over the supply range of 2.5V to 5.5V and

consumes only 24µW with a supply of 3V.

The single open drain output can be switched on with either a North

or South pole of sufficient strength. When the magnetic flux density

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

the output is switched 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.

The AH1809 is available in SC59, SOT553 and SIP-3L.

Features

• Omnipolar (North or South pole) Operation

• Low Sensitivity

• Single Open Drain Output

• Micropower Operation

• 2.5V to 5.5V Operating Range

• Chopper Stabilized Design Provides

 Superior Temperature Stability

 Minimal Switch Point Drift

 Enhanced Immunity to Stress

• Good RF Noise Immunity

• -40°C to +125°C Operating Temperature

• High ESD

• Small Low Profile SOT553 and Industry Standard SC59 and

SIP-3L Packages

• 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.

Applications

• Smart E-Meters

• Tamper Protection Switch

• Door, Lids and Tray Position Switch

• Proximity and Position Switches

• Level Detects

• On/Off Switch Digital Contact-Less Switch in Industrial and

Consumer Products

TOP View)

SC59

(TOP View)

SOT553

(TOP View)

SIP-3L

OUTPUT

GND

AH1809

Document number: DS35523 Rev. 3 - 2

1 of 13

www.diodes.com

February 2014

Typical Applications Circuit

H1809

Note: 4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF. R

is the pull-up resistor, the recommended resistance is 10kΩ to 100kΩ.

Pin Descriptions

Package: SC59 and SIP-3L

Pin Number Pin Name Function

2 GND Ground

3 OUTPUT Output Pin

Package: SOT553

Pin Number Pin Name Function

1 NC No Connection (Note 5)

2 GND Ground

3 NC No Connection (Note 5)

5 OUTPUT Output

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

Power Supply Input

Functional Block Diagram

AH1809

Document number: DS35523 Rev. 3 - 2

2 of 13

www.diodes.com

February 2014

H1809

Absolute Maximum Ratings (Note 6) (@T

Symbol Parameter Rating Unit

VDD

OUT

DD REV

OUT_REV

OUTPUT

Supply Voltage (Note 7) 7 V

Output Pin Voltage (Note 7) 7 V

Reverse Supply Voltage -0.3 V

Reverse Output Pin Voltage -0.3 V

Output current (source and sink) 2.5 mA

B Magnetic Flux Density Unlimited

Package Power Dissipation

Ts Storage Temperature Range -65 to +150 °C

Maximum Junction Temperature +150 °C

ESD HBM Human Body Model ESD capability 6 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 operate the device at the absolute maximum rated conditions for any period of time.

of 7V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to

Recommended Operating Conditions (@T

Symbol Parameter Conditions Rating Unit

VDD

OUT_MAX

Electrical Characteristics (@T

Symbol Parameter Conditions Min Typ Max Unit

OUT_ON

Ioff Output Leakage Current

IDD(awake)

IDD(sleep)

IDD(avg)

Tawake Awake Time (Note 8)

Tperiod Period (Note 8)

D.C. Duty Cycle

Note: 8. When power is initially turned on, the operating VDD must be within its correct operating range (2.5V to 5.5V) to guaranteed the output sampling. The output state is valid after the second operating cycle (typical 150ms).

Supply Voltage Operating 2.5 to 5.5 V

Maximum output pin voltage Operating 5.5 V

Operating Temperature Range Operating -40 to +125

= +25°C, VDD = 3V, unless otherwise specified.)

Output On Voltage (V

)

Supply Current

Average Supply Current

= +25°C, unless otherwise specified.)

SC59 and SOT553 230 mW

SIP-3L 230

= +25°C, unless otherwise specified.)

= 1mA

OUT

= 5.5V, Output off

OUT

During ‘awake’ period,

= +25°C, VDD = 3V

During ‘awake’ period,

= -40 to +125°C, VDD = 2.5V to 5.5V

During ‘sleep’ period, T

= +25°C, VDD = 3V

During ‘sleep’ period, T

= -40 to +125°C, VDD = 2.5V to 5.5V

= +25°C, VDD = 3V

TA = -40 to +125°C, VDD = 2.5V to 5.5V

°C

— 0.1 0.3 V

— < 0.1 1 µA

—

3 6 mA

— 12 mA

5 10 µA

28 µA

8 16 µA

— 40 µA

75 125 µs

75 125 ms

0.1 — %

AH1809

Document number: DS35523 Rev. 3 - 2

3 of 13

www.diodes.com

February 2014

H1809

Magnetic Characteristics (Note 9 &10) (T

Symbol Characteristics Test Condition Min Typ Max Unit

Bops (south pole to part marking side)

Operation Point

Bopn (north pole to part marking side)

Brps (south pole to part marking side)

Brpn (north pole to part marking side)

Bhy (|Bopx|-|Brpx|) Hysteresis (Note 11)

Notes: 9. Typical data is at TA = +25°C, VDD = 3V.

10. Parameters values over operating temperature range are not tested in production, they are guaranteed by design, process control and characterization. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.

11. Maximum and minimum hysteresis is guaranteed by design and characterization.

= +25°C, VDD = 2.5V to 5.5V, unless otherwise specified)

= +25°C

TA = -40°C to +125°C

= +25°C

TA = -40°C to +125°C

= +25°C

Release Point

TA = -40°C to +125°C

= +25°C

TA = -40°C to +125°C

= +25°C

TA = -40°C to +125°C

(1mT=10 Gauss)

100 130 165

90 130 185

-165 -130 -100

-185 -130 -90

90 115 150

80 115 170

-150 -115 -90

-170 -115 -80

10 15 20

5 15 —

Gauss

AH1809

Document number: DS35523 Rev. 3 - 2

4 of 13

www.diodes.com

February 2014

+ 9 hidden pages