MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH

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Description

The AH1888 micro power Omni-polar Hall Effect switch IC designed for portable and battery powered equipment such as cellular phones, PDA’ s and portable PC’ s. Based on two sensitive Hall Effect plates and chopper stabilized architecture the AH1888 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 1.65V to 3.3V and consumes only 12.6µW with a supply of 1.8V.

The outputs are switched with either a north or south pole of sufficient strength. When the magnetic flux density (B) is larger than operate point (Bop) the output is switched on. 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 AH1888-ZG has two outputs, output one pulls low when switched on and output two is inverted. The AH1888-FJG provides output one and AH1888-FJRG provides output two.

Features

• Omni-polar (north or south pole) operation • Single or dual output options

• Internal output pull up capability • Micropower operation • 1.65V to 3.3V operating range • Chopper stabilized design provides • Superior temperature stability • Minimal switch point drift • Enhanced immunity to stress • Good RF noise immunity

• -40°C to 85°C operating temperature • ESD (HBM)＞4KV for SOT553

• ESD (HBM)＞5KV for U-DFN2020-3 and U-DFN2020R-3 • Package: SOT553, U-DFN2020-3 and U-DFN2020R-3 • Halogen and Antimony free “Green” device

Pin Assignments

5 4 3 2 1 GND Output1 NC Output 2 Vdd ( Top View ) SOT553 U-DFN2020-3 (Top View) 3. GND 2. Output 1 1. Vdd U-DFN2020R-3 (Top View) 3. GND 2. Output 2 1. Vdd

Applications

• Cellular phone • Portable PC and PDAs • Camcorders • Cordless phone

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Typical Application Circuit

(1) SOT553

(2) U-DFN2020-3

(3) U-DFN2020R-3

AH1888

Vdd

Output 1

GND

Output 2

AH1888

Vdd

Output 1

GND

AH1888

Vdd

Output 2

GND

Pin Descriptions

Pin Name P/I/O Description

Vdd P/I Power Supply Voltage

GND P/I Ground

Output 1 O Output Pin ( Active Low ) Output 2 O Output Pin ( Active High )

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Functional Block Diagram

(1) SOT553

Output Driver Controller Latch Latch Sleep/Awake Logic

and Power Switch Vdd Hall Plate Amp Hall Plate Amp _{Output 2} GND Of fset Cancellati on Of fs e t Canc ellat ion Output 1 GND Vdd

(2) U-DFN2020-3

and Power Switch Vdd Hall Plate Amp Hall Plate Amp Output 1 Of fs et C a nc el la tion O ffs e t C anc e llat ion GND

(3) U-DFN2020R-3

and Power Switch Vdd Hall Plate Amp Hall Plate Amp Output 2 Of fs e t C ancel la ti on O ffset Ca nc ell a tion GND

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Absolute Maximum Ratings

(T

A

= 25

°C)

Symbol Characteristics Values Unit

Vdd Supply voltage 5 V

B Magnetic flux density Unlimited

T_S Storage Temperature Range -65 to +150 °C

PD Package Power Dissipation 230 mW

TJ Maximum Junction Temperature 150 °C

Recommended Operating Conditions

(T

A

= 25

°C)

Symbol Characteristic Conditions Rating Unit

Vdd Supply Voltage Operating 1.65 to 3.3 V

TA Operating Temperature Range Operating -40 to +85 °C

Electrical Characteristics

(T

A

= 25

°C, Vdd = 1.8V, unless otherwise specified)

Symbol Characteristic Conditions Min Typ. Max Unit

VOH Output On Voltage (High side) IO = -0.5mA Vdd - 0.2 - - V

VOL Output On Voltage (Low side) IO = 0.5mA - - 0.2 V

Idd(en)

Supply Current

Chip enable - 2 4 mA

Idd(dis) Chip disable - 5 8 µA

Idd(avg) Average supply current - 7 12 µA

Tawake Awake Time (Note 1) - 50 100 µs

Tperiod Period (Note 1) - 50 100 ms

D.C. Duty Cycle - 0.1 - %

Notes: 1. When power is initially turned on, Vdd must be within its correct operating range (1.65V to 3.3V) to guarantee the output sampling. The output state is valid after the second operating cycle (typical 100ms).

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Magnetic Characteristics

(T

A

= 25

°C, Vdd = 1.8V ~ 3.0V, Note 2 & 3)

(1mT=10 Gauss)

Symbol Characteristic Min Typ. Max Unit

Bops(south pole to brand side)

Operate Point - 61 79

Gauss

Bopn(north pole to brand side) -79 -61 -

Brps(south pole to brand side)

Release Point 35 53 -

Brpn(north pole to brand side) - -53 -35

Bhy(

Bopx

−

Brpx

) Hysteresis 3 8 -

Notes: 2. Typical data is at Vdd = 3V.

3. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering.

B

hy

V

sat

V

dd

(

O

ut

p

u

t

V

o

lt

a

ge

)

B

opn

B

rpn

0 ( Magnetic flux density B )

Turn on

Turn off

( off-state )

( on-state )

B

hy

V

sat

V

dd

(

O

ut

p

u

t

V

o

lt

a

ge

)

B

rps

B

ops

0 ( Magnetic flux density B )

Turn off

Turn on

( off-state )

( on-state )

N

S

Output 1 ( Active Low )

B

hy

V

sat

V

dd

(

Out

pu

t

V

o

lt

a

g

e

)

B

opn

B

rpn

0 ( Magnetic flux density B )

Turn on

Turn off

( off-state )

( on-state )

B

hy

V

sat

V

dd

(

Out

pu

t

V

o

lt

a

g

e

)

B

rps

B

ops

0 ( Magnetic flux density B )

Turn off

Turn on

( off-state )

( on-state )

N

S

Output 2 ( Active High )

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Typical Characteristics

-50 -25 0 25 50 75 100

TEMPERATURE (°C) Switch Points vs. Temperature

V_DD = 2.8V 80 60 40 20 -20 -40 -60 -80 0 SW IT C H P O IN T ( G au ss) Brps Bops Bopn Brpn 1.5 2.0 2.5 3.0 3.2 V (V)

Switch Points vs. Temperature T = 25°C DD A 80 60 40 20 -20 -40 -60 -80 0 SW IT C H P O IN T ( G au ss) Brps Bops Brpn Bopn

Performance Characteristics

For SOT553, U-DFN2020-3 and U-DFN3030R-3

TA (°C) 25 50 60 70 80 85 90 100 110 120 130 140 150 PD (mW) 230 184 166 147 129 120 110 92 74 55 37 18 0 T = 25°C Power Dissipation A 0 25 50 75 85 ₁₀₀ ₁₂₅ ₁₅₀ 300 200 100 0 P (W ) D

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Ordering Information

_{AH 1888 - XXX G - 7}

Packing

Package

Green

Z : SOT553

G : Green

7 : Tape & Reel

FJ : U-DFN2020-3

FJR : U-DFN2020R-3

Device Package Code Packaging (Note 4 & 5)

7” Tape and Reel

Quantity Part Number Suffix

AH1888-ZG-7 Z SOT553 3000/Tape & Reel -7

AH1888-FJG-7 FJ U-DFN2020-3 3000/Tape & Reel -7

AH1888-FJRG-7 FJR U-DFN2020R-3 3000/Tape & Reel -7

Notes: 4. EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. No purposely added lead. Halogen and Antimony free. Please visit our website at http://www.diodes.com/products/lead_free.html.

5. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at http://www.diodes.com/datasheets/ap02001.pdf.

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Marking Information

(1) SOT553

( Top View )

Y : Year : 0~9

X : A~Z : Green

XX : Identification Code

W : Week : A~Z : 1~26 week;

a~z : 27~52 week;

z represents 52 and 53 week

XX Y W X

Part Number Package Identification Code

AH1888 SOT553 KV

(2) U-DFN2020-3 and U-DFN2020R-3

( Top View )

X X

Pin 1 indicator

Y : Year : 0~9

X : A~Z : Green

XX : Identification Code

W : Week : A~Z : 1~26 week;

a~z : 27~52 week;

z represents 52 and 53 week

Y WX

Part Number Package Identification Code

AH1888 U-DFN2020-3 KV

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Package Outline Dimensions

(All Dimensions in mm)

(1) Package Type: SOT553

1.0Typ. 0.15/0.30(5x) 0. 3 0 C 0.10 M C A-B D B CL D 0. 30 C D 0.10/0.18 1.50/1.70 0.30 C D A Top View 1. 2

Land Pattern Recommendation (Unit:mm) 1.0Typ. 1. 7 2. 2 Pin1 Pin1 0. 1 0.5Typ. 0.5Typ. 0.3 0.32/0.58 Hall Sensor 0.3 0.07± Die

=Package Center Location Line

5x -0 .5 1.1 0 /1 .25 1. 5 5 /1 .7 0 0.45/ 0.6 7 CL CL CL 0.55/ 0 .62 6 ~8° ° 6 ~8 ° ° 6°~8 ° CL

(2) Package Type: U-DFN2020-3 and U-DFN2020R-3

1 0. 6 0. 4 0. 45 1. 1 0. 15 R0.2 25 0.322 0.45 0.48 1.4 R0.2 0.35 0. 68 9 0. 45 R0_.2 1.1/1.3 0.325Ref. B 0.25 B 2x-0.10 M C A B 0.3 5 /0 .4 5 0/ 0 .05 0. 57 /0. 63 0.10 C 0.08 C 1.95/2.075 _A 0. 25 A 2x C Seating plane Bottom View 1. 9 5/ 2. 07 5 Sensor location

Land Pattern Recommendation (Unit:mm) Top View 0. 74 1.03 0. 8 /1. 0 Top View DIE 0.18 0.07± Pin1 Pin1

= Package Center location Line

2. 3 1 CL 0.2/0.3 CL CL CL CL CL CL 0. 152 T y p 0. 138 R ef

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Taping Orientation

(Note 6)

For U-DFN2020-3 and U-DFN2020R-3

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