AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Description Pin Assignments 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 12.6uW with a supply of 1.8V. ( Top View ) Output 2 1 GND 2 NC 3 Vdd ( Top View ) 3. GND 3. GND 1. Vdd 2. Output 1 DFN2020-3 Applications • • • • • • • • • • • • • • • • • • Document number: DS31565 Rev. 6 - 2 4 ( Top View ) Features AH1888 Output1 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. 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 DFN2020-3 and DFN2020R-3 Package: SOT553, DFN2020-3 and DFN2020R-3 “Green” Molding Compound 5 1. Vdd 2. Output 2 DFN2020R-3 Cellular phone PDA Cordless phone 1 of 11 www.diodes.com August 2010 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Typical Application Circuit (1) SOT553 (2) DFN2020-3 Vdd (3) 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 Description Power Supply Voltage GND P/I Ground Output 1 O Output Pin ( Active Low ) Output 2 O Output Pin ( Active High ) AH1888 Document number: DS31565 Rev. 6 - 2 2 of 11 www.diodes.com August 2010 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Functional Block Diagram (1) SOT553 Vdd Power switch Offset Cancelling Hall Plate Amp Latch Output 1 Logical Offset Cancelling Hall Plate Amp GND Vdd Latch Output 2 GND (2) DFN2020-3 Vdd Power switch Offset Cancelling Hall Plate Amp Latch Logical Offset Cancelling Hall Plate Amp Output 1 GND Latch (3) DFN2020R-3 Vdd Power switch Offset Cancelling Hall Plate Amp Latch Logical AH1888 Document number: DS31565 Rev. 6 - 2 Offset Cancelling Hall Plate Amp Latch 3 of 11 www.diodes.com Output 2 GND August 2010 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Absolute Maximum Ratings (TA = 25°C) Symbol Vdd B Characteristics Values Supply voltage Magnetic flux density Unit 5 Unlimited V PD Package Power Dissipation 230 °C 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 Ts Storage Temperature Range -65 to +150 Recommended Operating Conditions (TA = 25°C) Symbol Vdd TA Characteristic Electrical Characteristics (TA = 25°C, Vdd = 1.8V, unless otherwise specified) Symbol VOH VOL Idd(en) Idd(dis) Idd(avg) Tawake Tperiod D.C. Notes: Characteristic Output On Voltage (High side) Output On Voltage (Low side) Supply Current Awake Time Period Duty Cycle Conditions IO= -0.5mA IO= 0.5mA Chip enable Chip disable Average supply current (Note 1) (Note 1) Min Typ. Max Unit Vdd-0.2 - 2 5 7 50 50 0.1 0.2 4 8 12 100 100 - V V mA uA uA µs ms % 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. 6 - 2 4 of 11 www.diodes.com August 2010 © 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: Operate Point Release Point Min Typ. Max -79 35 - 61 -61 53 -53 79 -35 3 8 - 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. 6 - 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 ) V sat 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 August 2010 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Typical Characteristics Sw itch points vs Tem perature Vdd = 2.8V 80 80 Bops 40 Brps 20 0 -20 Brpn -40 -60 Bops 60 Switch Point (Gauss) 60 Switch Point (Gauss) Sw itch Points vs Supply Voltage TA = 25 ℃ 40 Brps 20 0 -20 Brpn -40 -60 Bopn -80 Bopn -80 -50 -25 0 25 50 75 100 1.5 2.0 2.5 3.0 3.5 Vdd (V) Tem perature (℃ ) Performance Characteristics For SOT553, DFN2020-3 and 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 P D (m W ) P o w e r D is s i p a tio n C u rv e 300 200 100 0 -40 0 25 50 75 85 100 12 5 150 o TA ( C) AH1888 Document number: DS31565 Rev. 6 - 2 6 of 11 www.diodes.com August 2010 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Ordering Information AH 1888 - XXX G - 7 Package Z : SOT553 FJ : DFN2020-3 FJR : DFN2020R-3 Device AH1888-ZG-7 AH1888-FJG-7 AH1888-FJRG-7 Notes: Package Code Z FJ FJR Packaging (Note 4 & 5) SOT553 DFN2020-3 DFN2020R-3 Green Packing G : Green 7 : Tape & Reel 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3000/Tape & Reel -7 3000/Tape & Reel -7 4. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. 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. 6 - 2 7 of 11 www.diodes.com August 2010 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Marking Information (1) SOT553 ( Top View ) XX Y W X Part Number AH1888 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 Package SOT553 Identification Code KV (2) DFN2020-3 and DFN2020R-3 ( Top View ) XX YWX Part Number AH1888 AH1888 AH1888 Document number: DS31565 Rev. 6 - 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 Package DFN2020-3 DFN2020R-3 8 of 11 www.diodes.com Identification Code KV KW August 2010 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Package Outline Dimensions (All Dimensions in mm) (1) Package Type: SOT553 1.50/1.70 0.32/0.58 1.7 C L 1.2 C L 2.2 0.1 6°~8 ° 5x-0.5 0.30 C D CL 0.10/0.18 A 0.45/0.67 1.10/1.25 1.0Typ. CL Hall Sensor Pin1 0.5Typ. 0.30 C 1.55/1.70 D 0.30 C D 1.0Typ. 0.15/0.30(5x) Pin1 0.10 M C A-B D 0.5Typ. 0.3 Land Pattern Recommendation (Unit:mm) Top View B 0.55/0.62 6°~8° 6°~ 8° (2) Package Type: DFN2020-3 and DFN2020R-3 1.03 1.25 0.325 0.74 0.3 CL 0.08 C .2 CL Pin1 Pin2 CL 0.2/0.3 0.10 M C A B 1.1/1.35 1.85/2.15 Land Pattern Recommendation Unit:mm Top View 0.18±0.07 0.325 A Bottom View 2x 0.25 A 1 DIE Pin3 0.25 B 0.5 Pin2 Pin1 0.138 1.85/2.15 0.775/0.975 R0 0.3 C 0.35/0.45 0.5Typ B 2x- 2.4 Seating plane CL 0.65 0.10 C 0/0.05 0.47/0.53 Sensor location Top View 0.925 0.138 Pin3 AH1888 Document number: DS31565 Rev. 6 - 2 9 of 11 www.diodes.com August 2010 © Diodes Incorporated AH1888 MICROPOWER, GENERAL-SENSITIVE HALL EFFECT SWITCH Taping Orientation (Note 6) For DFN2020-3 and 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. 6 - 2 10 of 11 www.diodes.com August 2010 © 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. 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. 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