AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Description Pin Assignments ( Top View ) 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. • • • • • • • • • • • • • • • Document number: DS31565 Rev. 8 - 2 GND 2 NC 3 5 Output1 4 Vdd (Top View) (Top View) 3. GND 3. GND 1. Vdd 2. Output 1 U-DFN2020-3 1. Vdd 2. Output 2 U-DFN2020R-3 Applications 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 AH1888 1 SOT553 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 Output 2 • • • • • 1 of 11 www.diodes.com Cellular phone Portable PC and PDAs Camcorders Cordless phone Contactless switch in consumer products February 2012 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Typical Application Circuit (1) SOT553 (2) U-DFN2020-3 Vdd (3) U-DFN2020R-3 Vdd Output 1 AH1888 AH1888 Vdd Output 1 AH1888 Output 2 Output 2 GND GND GND Pin Descriptions Pin Name P/I/O Vdd P/I Power Supply Voltage Description GND P/I Ground Output 1 O Output Pin ( Active Low ) Output 2 O Output Pin ( Active High ) AH1888 Document number: DS31565 Rev. 8 - 2 2 of 11 www.diodes.com February 2012 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Functional Block Diagram (1) SOT553 Vdd Sleep/Awake Logic and Power Switch Offset Cancellation Hall Plate Output Driver Controller Offset Cancellation Hall Plate Output 1 Latch Amp Amp GND Vdd Latch Output 2 GND (2) U-DFN2020-3 Vdd Sleep/Awake Logic and Power Switch Offset Cancellation Hall Plate Offset Cancellation Hall Plate Amp Latch Output Driver Controller Output 1 GND Amp Latch (3) U-DFN2020R-3 Vdd Sleep/Awake Logic and Power Switch AH1888 Document number: DS31565 Rev. 8 - 2 Offset Cancellation Hall Plate Offset Cancellation Hall Plate Amp Latch Output Driver Controller Output 2 GND Amp Latch 3 of 11 www.diodes.com February 2012 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Absolute Maximum Ratings (TA = 25°C) Symbol Vdd Characteristics Values Unit 5 V Supply voltage B Magnetic flux density Unlimited TS Storage Temperature Range -65 to +150 °C PD Package Power Dissipation 230 mW TJ Maximum Junction Temperature 150 °C Conditions Rating Unit Supply Voltage Operating 1.65 to 3.3 V Operating Temperature Range Operating -40 to +85 °C Recommended Operating Conditions (TA = 25°C) Symbol Vdd TA Characteristic Electrical Characteristics (TA = 25°C, Vdd = 1.8V, unless otherwise specified) Symbol Characteristic 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 Chip enable - 2 4 mA Idd(en) Idd(dis) Supply Current Chip disable - 5 8 µA Average supply current - 7 12 µA Awake Time (Note 1) - 50 100 µs Period (Note 1) - 50 100 ms - 0.1 - % Idd(avg) Tawake Tperiod D.C. Notes: Conditions Duty Cycle 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). AH1888 Document number: DS31565 Rev. 8 - 2 4 of 11 www.diodes.com February 2012 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Magnetic Characteristics (TA = 25°C, Vdd = 1.8V ~ 3.0V, Note 2 & 3) (1mT=10 Gauss) Symbol Characteristic Bops(south pole to brand side) Bopn(north pole to brand side) Brps(south pole to brand side) Brpn(north pole to brand side) Bhy( Bopx − Brpx ) Notes: Min Operate Point Typ. Max - 61 79 -79 -61 - 35 53 - - -53 -35 3 8 - Release Point Hysteresis Unit Gauss 2. Typical data is at Vdd = 3V. 3. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering. Output 1 ( Active Low ) Vdd ( off-state ) Bhy Turn on ( on-state ) N ( Output Voltage ) ( Output Voltage ) Output 1 ( Active Low ) Turn off ( off-state ) Turn off Vsat Bopn Brpn 0 ( Magnetic flux density B ) S N Bhy ( on-state ) N Turn off AH1888 Document number: DS31565 Rev. 8 - 2 ( off-state ) Turn off Vsat Bopn Brpn 0 ( Magnetic flux density B ) 0 Brps Bops ( Magnetic flux density B ) V sat S S Output 2 ( Active High ) ( Output Voltage ) ( Output Voltage ) Turn on ( off-state ) Turn on ( on-state ) Vsat Output 2 ( Active High ) Vdd Bhy Vdd N 5 of 11 www.diodes.com Bhy Vdd Turn on ( on-state ) 0 Brps Bops ( Magnetic flux density B ) S February 2012 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Typical Characteristics 80 80 Bops Bops 60 40 SWITCH POINT (Gauss) SWITCH POINT (Gauss) 60 Brps 20 0 -20 Brpn -40 -60 -25 0 25 50 20 0 -20 -40 Brpn -60 Bopn -80 -50 Brps 40 Bopn 75 -80 1.5 100 TEMPERATURE (°C) Switch Points vs. Temperature VDD = 2.8V 2.0 2.5 3.0 3.2 VDD (V) Switch Points vs. Temperature TA = 25°C 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 0 300 PD (W) 200 100 0 0 AH1888 Document number: DS31565 Rev. 8 - 2 25 50 75 85 100 TA = 25°C Power Dissipation 6 of 11 www.diodes.com 125 150 February 2012 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Ordering Information AH 1888 - XXX G - 7 Package Green Packing Z : SOT553 FJ : U-DFN2020-3 FJR : U-DFN2020R-3 G : Green 7 : Tape & Reel 7” Tape and Reel Device Package Code Packaging (Note 4 & 5) 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. AH1888 Document number: DS31565 Rev. 8 - 2 7 of 11 www.diodes.com February 2012 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Marking Information (1) SOT553 ( Top View ) XX Y W X XX : Identification Code Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green Part Number Package Identification Code AH1888 SOT553 KV (2) U-DFN2020-3 and U-DFN2020R-3 ( Top View ) XX YWX AH1888 Document number: DS31565 Rev. 8 - 2 Pin 1 indicator XX : Identification Code Y : Year : 0~9 W : Week : A~Z : 1~26 week; a~z : 27~52 week; z represents 52 and 53 week X : A~Z : Green Part Number Package Identification Code AH1888 U-DFN2020-3 KV AH1888 U-DFN2020R-3 KW 8 of 11 www.diodes.com February 2012 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Package Outline Dimensions (All Dimensions in mm) (1) Package Type: SOT553 1.50/1.70 CL 5x-0.5 0.30 C D CL ° ~8 6° 0.32/0.58 CL 2.2 1.7 Die CL 1.2 0.1 0.45/0.67 1.10/1.25 1.0Typ. 0.10/0.18 0.3±0.07 A 0.30 C 1.55/1.70 D 0.30 C D 1.0Typ. Hall Sensor Pin1 0.5Typ. 0.15/0.30(5x) Pin1 0.10 M C A-B D 0.5Typ. B 6°~8° 0.3 0.55/0.62 Top View Land Pattern Recommendation (Unit:mm) CL=Package Center Location Line ° ~8 6° (2) Package Type: U-DFN2020-3 and U-DFN2020R-3 0.74 1.03 1.4 0.48 0.45 CL 1 Pin1 1.1/1.3 1.1 2.3 R0 .2 25 Top View Land Pattern Recommendation (Unit:mm) DIE 0.2/0.3 CL= Package Center location Line 0.18±0.07 0.325Ref. 1.95/2.075 A Bottom View 2x 0.25 A 0.35 0.138 Ref 0.8/1.0 1.95/2.075 CL 0.10 M C A B 0.4 0.45 1 R0 .2 2x- 0.25 B .2 R0Pin1 C CL 0.35/0.45 B Seating plane 0.6 0.08 C CL 0.15 CL 0.689 0.45 Top View 0.152 Typ Sensor location 0/0.05 0.57/0.63 CL 0.10 C 0.322 AH1888 Document number: DS31565 Rev. 8 - 2 9 of 11 www.diodes.com February 2012 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Taping Orientation (Note 6) For U-DFN2020-3 and U-DFN2020R-3 Notes: 6. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf. AH1888 Document number: DS31565 Rev. 8 - 2 10 of 11 www.diodes.com February 2012 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH IMPORTANT NOTICE 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. 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