AH1885 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Description Pin Assignments AH1885 is with two Hall effect plates and dual CMOS output driver, mainly designed for battery–powered, handheld equipment (such as Cellular and Cordless Phone, PDA). The total operation power is down to 15uW in the 1.8V supply. ( Top View ) Either north or south pole of sufficient strength will turn the output1 on. The output1 will be turned off under no magnetic field. Out 2 1 GND 2 NC 3 5 Out 1 4 Vdd SOT553 While the magnetic flux density (B) is larger than operate point (Bop), the output1 will be turned on (low), the output1 is held until B is lower than release point (Brp), then turned off. Features Applications • • • • • • • • • • Micropower operation Operation with North or South Pole 1.65V to 3.3V battery operation Chopper stabilized • Superior temperature stability • Extremely Low Switch-Point Drift • Insensitive to Physical Stress Good RF noise immunity -40°C to 85°C operating temperature ESD ＞ 4KV in human body mode • • Package: SOT553 “Green” Molding Compound Cellular phone PDA Cordless phone Typical Application Circuit Vdd Output 1 AH1885 GND AH1885 Document number: DS31235 Rev. 4 - 2 Output 2 (Complement of Output 1) 1 of 7 www.diodes.com September 2010 © Diodes Incorporated AH1885 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Pin Descriptions Pin Name P/I/O Pin # Out 2 GND NC Vdd Out 1 O P/I 1 2 3 4 5 P/I O Description Output Pin (active High) Ground No Connection Power Supply Voltage Output Pin (active Low) Functional Block Diagram Vdd Power switch Offset Cancelling Hall Plate Latch Amp Out1 GND Vdd Logical Offset Cancelling Hall Plate Amp Latch Out2 GND Absolute Maximum Ratings (TA = 25°C) Symbol Vdd B TS PD TJ Characteristics Supply voltage Magnetic flux density Storage Temperature Range Package Power Dissipation Maximum Junction Temperature Values Unit 5 V Unlimited -65 to +150 230 150 °C mW °C Recommended Operating Conditions (TA = 25°C) Symbol Vdd TA Parameter Conditions Rating Supply Voltage Operating 1.65 to 3.3 V Operating Temperature Range Operating -40 to +85 °C AH1885 Document number: DS31235 Rev. 4 - 2 2 of 7 www.diodes.com Unit September 2010 © Diodes Incorporated AH1885 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Electrical Characteristics (TA = 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 Chip enable - 2 4 mA Supply Current Chip disable - 5 8 uA average supply current - 7 12 uA Idd(en) Idd(dis) Idd(avg) Tawake Awake Time - 50 100 µs Tperiod Period - 50 100 ms Duty Cycle - 0.1 - % D.C. Magnetic Characteristics (TA = 25°C, Vdd = 1.8V~3.0V, Note 1 & 2) (1mT=10 Gauss) Characteristic (Note 3) Symbol Bops(south pole to brand side) Operate Point Bopn(north pole to brand side) Brps(south pole to brand side) Release Point Brpn(north pole to brand side) Bhy(|Bopx|-|Brpx|) Notes: Hysteresis Min Typ. Max 18 37 59 -59 -37 -18 15 29 - - -29 -15 3 8 - Unit Gauss 1. Typical data is at Ta = 25°C, Vdd = 3V, and for design information only. 2. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering. Output1 Vdd ( off-state ) Turn on ( on-state ) B hy Turn off ( Output Voltage ) ( Output Voltage ) Output1 Document number: DS31235 Rev. 4 - 2 Turn off Vdd B hy Turn on Vsat Vsat Bopn B rpn 0 ( Magnetic flux density B ) AH1885 ( off-state ) ( on-state ) 0 B rps Bops ( Magnetic flux density B ) 3 of 7 www.diodes.com September 2010 © Diodes Incorporated AH1885 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Typical Operating Characteristics Switching Point AH1885 Hysteresis vs Vdd (Ta =25 AH1885 Hysteresis vs Temperature (Vdd = 1.8V) ) 60 50 40 30 20 10 Gauss(G) 0 -10 -20 -30 -40 -50 40 Brpn Brpn 20 Bopn Brps Bops Bhys_n Bhys_s Bopn Brps Gauss (G) 0 1.8 2.3 2.8 Bhys_s -20 -40 -50 -25 0 25 50 75 100 -60 Vdd(V) Temperature Supply Current AH1885 Idd(avg.) vs Temperature AH1885 Idd(avg.) vs Vdd (Ta=25 10 ) 12 9 10 8 7 8 Idd(avg.) 6 unit : uA 5 Icc (avg) uA Idd(avg.) 6 unit: uA Vdd = 2.5V 4 4 Vdd = 1.8V 2 3 2 0 -50 -25 0 25 50 75 100 1.8 Temperature AH1885 Document number: DS31235 Rev. 4 - 2 Bops Bhys_n 2.3 2.8 Vdd(V) 4 of 7 www.diodes.com September 2010 © Diodes Incorporated AH1885 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Performance Characteristics 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) Ordering Information AH 1885 - Z G - 7 Device AH1885-ZG-7 Notes: Package Green Packing Z : SOT553 G : Green 7 : Tape & Reel Package Code Z Packaging (Note 3 & 4) SOT553 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 3. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 4. 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. AH1885 Document number: DS31235 Rev. 4 - 2 5 of 7 www.diodes.com September 2010 © Diodes Incorporated AH1885 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Marking Information (1) SOT553 ( Top View ) XX Y W X Part Number AH1885 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 KS Package Outline Dimensions (All Dimensions in mm) (1) Package Type: SOT553 1.50/1.70 1.0Typ. CL 0.10/0.18 CL 0.32/0.58 Pin1 0.5Typ. 2.2 1.2 C L 1.7 0.1 0.45/0.67 1.10/1.25 C L 0.30 C 1.55/1.70 6°~8 ° A 5x-0.5 0.30 C D D 0.30 C D 1.0Typ. Hall Sensor 0.15/0.30(5x) 0.10 M C A-B D B 0.55/0.62 6°~8° Pin1 0.5Typ. 0.3 Land Pattern Recommendation (Unit:mm) Top View 6°~ 8° AH1885 Document number: DS31235 Rev. 4 - 2 6 of 7 www.diodes.com September 2010 © Diodes Incorporated AH1885 MICROPOWER, ULTRA-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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