AH1885_10

AH1885 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Description 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. Either north or south pole of sufficient strength will turn the output1 on. The output1 will be turned off under no magnetic field. 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. Pin Assignments ( Top View ) Out 2 GND NC 1 2 3 SOT553 5 Out 1 4 Vdd Features • • • • 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 Applications • • • Cellular phone PDA Cordless phone • • • • • Typical Application Circuit Vdd Output 1 AH1885 GND Output 2 (Complement of Output 1) AH1885 Document number: DS31235 Rev. 4 - 2 1 of 7 www.diodes.com September 2010 © Diodes Incorporated AH1885 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Pin Descriptions Pin Name Out 2 GND NC Vdd Out 1 P/I/O O P/I P/I O Pin # 1 2 3 4 5 Output Pin (active High) Ground No Connection Power Supply Voltage Output Pin (active Low) Description Functional Block Diagram Vdd Power switch Offset Cancelling Offset Cancelling Hall Plate Amp Latch Out1 Logical Hall Plate GND Vdd 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 5 Unlimited -65 to +150 230 150 Unit V °C mW °C Recommended Operating Conditions (TA = 25°C) Symbol Vdd TA Parameter Supply Voltage Operating Temperature Range Conditions Operating Operating Rating 1.65 to 3.3 -40 to +85 Unit V °C AH1885 Document number: DS31235 Rev. 4 - 2 2 of 7 www.diodes.com September 2010 © Diodes Incorporated AH1885 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Electrical Characteristics (TA = 25°C, Vdd = 1.8V; unless otherwise specified) Symbol VOH VOL Idd(en) Idd(dis) Idd(avg) Tawake Tperiod D.C. Awake Time Period Duty Cycle Supply Current Characteristic Output On Voltage (High side) Output On Voltage (Low side) Conditions IO= -0.5mA IO= 0.5mA Chip enable Chip disable average supply current Min Vdd-0.2 Typ. 2 5 7 50 50 0.1 Max 0.2 4 8 12 100 100 Unit V V mA uA uA µs ms % Magnetic Characteristics (TA = 25°C, Vdd = 1.8V~3.0V, Note 1 & 2) (1mT=10 Gauss) Symbol 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: Characteristic (Note 3) Operate Point Release Point Hysteresis Min 18 -59 15 3 Typ. 37 -37 29 -29 8 Max 59 -18 -15 - 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 ( Output Voltage ) ( Output Voltage ) Output1 Vdd ( off-state ) B hy Turn off ( off-state ) Vdd Turn off B hy Turn on Turn on ( on-state ) Vsat Vsat ( on-state ) Bopn B rpn 0 ( Magnetic flux density B ) 0 B rps Bops ( Magnetic flux density B ) AH1885 Document number: DS31235 Rev. 4 - 2 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 Temperature (Vdd = 1.8V) 60 AH1885 Hysteresis vs Vdd (Ta =25 ) 50 40 30 20 10 Gauss(G) 0 -10 -20 -30 -40 -50 -50 -25 0 25 50 75 100 40 Brpn Bopn Brps Bops Bhys_n Bhys_s 20 Gauss (G) 0 Brpn Bopn Brps 1.8 -20 -40 -60 2.3 2.8 Bops Bhys_n Bhys_s Temperature Vdd(V) Supply Current AH1885 Idd(avg.) vs Temperature 10 9 8 7 Idd(avg.) 6 unit : uA 5 4 3 2 -50 -25 0 25 50 75 100 10 8 Idd(avg.) 6 Vdd = 2.5V Vdd = 1.8V 2 0 1.8 2.3 2.8 unit: uA 4 Icc (avg) uA AH1885 Idd(avg.) vs Vdd (Ta=25 12 ) Temperature Vdd(V) AH1885 Document number: DS31235 Rev. 4 - 2 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 ) 300 P o w e r D is s i p a tio n C u rv e 200 100 0 0 -4 0 25 50 75 85 100 12 5 150 o TA ( C) Ordering Information AH 1885 - Z G - 7 Package Z : SOT553 Device Package Code Z Packaging (Note 3 & 4) SOT553 Green Packing 7 : Tape & Reel G : Green AH1885-ZG-7 Notes: 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 : 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 Identification Code KS XX Y W X Part Number AH1885 Package SOT553 Package Outline Dimensions (All Dimensions in mm) (1) Package Type: SOT553 1.50/1.70 0.30 C D 0.30 C D 1.0Typ. C L A 1.0Typ. 5x-0.5 0.10/0.18 6°~8 ° C L D 0.45/0.67 1.55/1.70 1.10/1.25 0.32/0.58 Hall Sensor 0.30 C Pin1 0.5Typ. 6°~8° 1.2 0.15/0.30(5x) B 0.10 M C A-B D Pin1 0.5Typ. 0.3 Land Pattern Recommendation (Unit:mm) Top View 6°~ 8° AH1885 Document number: DS31235 Rev. 4 - 2 0.55/0.62 6 of 7 www.diodes.com 1.7 2.2 September 2010 © Diodes Incorporated C L 0.1 C L 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. 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. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. 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Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright © 2010, Diodes Incorporated www.diodes.com AH1885 Document number: DS31235 Rev. 4 - 2 7 of 7 www.diodes.com September 2010 © Diodes Incorporated