AH1808

HIGH SENSITIVITY MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH

Description

The AH1808 is a high-sensitivity, micropower Omnipolar Hall Effect

switch IC. It is designed for portable and battery powered consumer

equipment, home appliances and industrial equipment such as smart-

meter magnetic-tamper detection. Based on two sensitive Hall effect

plates and a chopper stabilized architecture, the AH1808 provides a

reliable solution over the whole operating range. To support portable

and battery powered equipment, 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

(B) perpendicular to the package 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.

Pin Assignments

(Top View)

3

OUTPUT

GND

2

1

V

DD

SC59

(Top View)

NC

GND

NC

1

2

3

4

5

OUTPUT

V

DD

Features



Omnipolar (North or South Pole) Operation

High 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° to +85° Operating Temperature

C

ESD (HBM) > 6KV

Small Low Profile SOT553 and Industry Standard SC59,

SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack) Packages

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

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

SOT553

3. OUTPUT

2. GND

1. V

DD

SIP-3 (Bulk Pack)



Applications



Doors, Lids, Covers and Trays Position Detect Switches

Display Switch for Portable PCs and Tablets

On/Off Switch for PDAs and Digital Cameras

Liquid Level Detection for Coffee Machines

Smart Meters

Position, Proximity and Level Detection Contact-Less Switch in

Battery Powered Consumer, Home Appliances and Industrial

Applications

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.

AH1808

Document number: DS35655 Rev. 7 - 2

1 of 12

www.diodes.com

February 2018

AH1808

Typical Applications Circuit

2.5V to 5.5V

V

DD

R

L

C

IN

AH1808

OUTPUT

GND

Note:

4. C

IN

is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF to 100nF.

R

L

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

Pin Descriptions

Packages: SC59, SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack)

Number

1

2

3

Name

V

DD

GND

OUTPUT

Power Supply Input

Ground

Output

Function

Package: SOT553

Number

1

2

3

4

5

Note:

Name

NC

GND

NC

V

DD

OUTPUT

Function

No Connection (Note 5)

Ground

No Connection (Note 5)

Power Supply Input

Output

5. NC is ―No Connection‖ pin and is not connected internally. This pin can be left open or tied to ground.

Functional Block Diagram

V

DD

Sleep/Awake Logic

and Power Switch

Hall

Plate

Offset

Cancellation

Amp

Latch

Output

Driver

Controller

OUTPUT

GND

Hall

Plate

Offset

Cancellation

Amp

Latch

AH1808

Document number: DS35655 Rev. 7 - 2

2 of 12

www.diodes.com

February 2018

AH1808

Absolute Maximum Ratings

(Note 6) (@T

A

= +25° unless otherwise specified.)

C,

Symbol

V

DD

V

OUT

V

DD REV

V

OUT_REV

I

OUTPUT

B

P

D

T

S

T

J

ESD HBM

Notes:

Parameter

Supply Voltage (Note 7)

Output Pin Voltage (Note 7)

Reverse Supply Voltage

Reverse Output Pin Voltage

Output Current (Source And Sink)

Magnetic Flux Density

Package Power Dissipation

Storage Temperature Range

Maximum Junction Temperature

Human Body Model ESD Capability

SC59 and SOT553

SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack)

Values

7

-0.3

2.5

Unlimited

230

-65 to +150

+150

6

Unit

V

mA

mW

°

C

°

C

kV

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

DD

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

operate the device at the absolute maximum rated conditions for any period of time.

Recommended Operating Conditions

(@T

A

= +25° unless otherwise specified.)

C,

Symbol

V

DD

V

OUT_MAX

T

A

Characteristic

Supply Voltage

Maximum Output Pin Voltage

Operating Temperature Range

Operating

Conditions

Rating

2.5 to 5.5

5.5

-40 to +85

Unit

V

°

C

Electrical Characteristics

Symbol

V

OUT_ON

I

OFF

Output On Voltage

(@T

A

= +25° V

DD

= 3V, unless otherwise specified.)

C,

Conditions

I

OUT

= 1mA

V

OUT

= 5.5V, Output off

During ‗awake‘ period,

T

A

= +25° V

DD

= 3V

C,

During ‗awake‘ period,

T

A

= -40° to +85° V

DD

= 2.5V to 5.5V

C

C,

During ‗sleep‘ period,

T

A

= +25° V

DD

= 3V

C,

During ‗sleep‘ period,

T

A

= -40° to +85° V

DD

= 2.5V to 5.5V

C

C,

Min

—

Typ

0.1

<

0.1

3

5

—

8

—

75

0.1

Max

0.3

1

6

12

10

28

16

40

125

—

Unit

V

µA

mA

µA

µs

ms

%

Characteristic

Output Leakage Current

I

DD

(awake)

Supply Current

I

DD

(sleep)

I

DD

(sleep)

I

DD

(avg)

t

AWAKE

t

PERIOD

D.C.

Note:

Average Supply Current

Awake Time

Period

Duty Cycle

T

A

= +25° V

DD

= 3V

C,

T

A

= -40° to +85° V

DD

= 2.5V to 5.5V

C

C,

(Note 8)

8. When power is initially turned on, the operating V

DD

must be within its correct operating range (2.5V to 5.5V) to guarantee the output sampling.

The output state is valid after the second operating cycle (typical 150ms).

t

PERIOD

t

AWAKE

I

DD

(awake)

t

SLEEP

Sample and output

latched

I

DD

(avg)

I

DD

(sleep)

0

AH1808

Document number: DS35655 Rev. 7 - 2

3 of 12

www.diodes.com

February 2018

AH1808

Magnetic Characteristics

(Notes 9 & 10) (@T

A

= -40° to +85° V

DD

= 2.5V to 5.5V, unless otherwise specified.)

C

C,

Symbol

Bops (south pole to part marking side)

Bopn (north pole to part marking side)

Brps (south pole to part marking side)

Brpn (north pole to part marking side)

Bhy (|Bopx|-|Brpx|)

Notes:

Characteristic

Operation Point

Release Point

Hysteresis (Note 11)

Min

20

-60

10

-50

5

Typ

40

-40

30

-30

10

(1mT=10 Gauss)

Max

Unit

60

-20

50

-10

—

Gauss

9. Typical data is at T

A

= +25° V

DD

= 3V, and for design information only.

C,

10. Maximum and minimum parameters values over the operating temperature range are not tested in production, they are guaranteed by design,

characterization and process control. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.

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

OUTPUT

V

OH

(off-state) V

DD

(off-state)

V

OH

( Output Voltage )

Turn

on

(on-state)

V

OUT_ON

=V

OL

B

hy

Turn

off

Turn

off

B

hy

Turn

on

(on-state)

V

OL

= V

SAT

B

opn

B

rpn

0

B

rps

B

ops

( Magnetic Flux Density B )

AH1808

Document number: DS35655 Rev. 7 - 2

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February 2018

AH1808

Thermal Performance Characteristics

(1)

Package Types: SC59, SOT553, SIP-3 (Ammo Pack) and SIP-3 (Bulk Pack)

T

A

(C)

P

D

(mW)

25

230

50

184

60

166

70

147

80

129

85

120

90

110

100

92

110

74

120

55

130

37

140

18

150

0

PD (mW)

300

Power Dissipation Curve

200

100

0

-40

0

25

50

75

85

100

125

T

A

(

o

C)

150

Ordering Information

AH1808 - X - X

Package

W : SC59

Z : SOT553

P : SIP-3 (Ammo Pack)

SIP-3 (Bulk Pack)

Packing

7 : Tape & Reel

A : Ammo Box (Note 12)

B : Bulk (Note 13)

Device

Package

Code

P

W

Z

Bulk

Packaging

SIP-3

(Ammo Pack)

SIP-3

(Bulk Pack)

SC59

SOT553

Quantity

NA

1,000

NA

Part

Number Suffix

NA

-B

NA

7” Tape and Reel

Ammo Box

Part

Quantity

Number Suffix

NA

3,000/Tape & Reel

NA

-7

4,000/Box

NA

-A

NA

AH1808-P-A

AH1808-P-B

AH1808-W-7

AH1808-Z-7

Notes:

12. Ammo Box is for SIP-3 Spread Lead.

13. Bulk is for SIP-3 Straight Lead.

AH1808

Document number: DS35655 Rev. 7 - 2

5 of 12

www.diodes.com

February 2018

参数名称	属性值
Product Attribute	Attribute Value
制造商 Manufacturer	Diodes
产品种类 Product Category	Board Mount Hall Effect / Magnetic Sensors
RoHS	Details
类型 Type	Hall Effect Switch
工作电源电流 Operating Supply Current	8 uA
Maximum Output Current	2.5 mA
Operating Point Min/Max	20 G, 60 G
Release Point Min/Max (Brp)	10 G, 50 G
最大工作温度 Maximum Operating Temperature	+ 85 C
安装风格 Mounting Style	SMD/SMT
工作电源电压 Operating Supply Voltage	5 V
封装 / 箱体 Package / Case	SOT-23-3
系列 Packaging	Cut Tape
系列 Packaging	MouseReel
系列 Packaging	Reel
Output Voltage	0.1 V
最小工作温度 Minimum Operating Temperature	- 40 C
Pd-功率耗散 Pd - Power Dissipation	230 mW
工厂包装数量 Factory Pack Quantity	3000
电源电压-最大 Supply Voltage - Max	5.5 V
电源电压-最小 Supply Voltage - Min	2.5 V

AH1808-W-7

AH1808-W-7在线购买

AH1808-W-7概述

AH1808-W-7规格参数

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