AH1887 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Description Pin Assignments AH1887 is with two Hall effect plates and dual CMOS output driver, mainly designed for battery–powered, hand-held 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 output on. The output will be turned off under no magnetic field. ( Top View ) Out 2 1 GND 2 NC 3 While the magnetic flux density (B) is larger than operate point Bop(s), the output1 will be turned on (low), the output is held until B is lower than release point Brp(s), then turned off (high). 5 Out 1 4 Vdd SOT553 While the magnetic flux density (B) is larger than operate point Bop(n), the output2 will be turned on (low), the output is held until B is lower than release point Brp(n), then turned off (high). 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 AH1887 Output 2 GND AH1887 Document number: DS31313 Rev. 4 - 2 1 of 7 www.diodes.com August 2010 © Diodes Incorporated AH1887 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Pin Descriptions Pin Name Out 2 (Note 1) GND NC Vdd Out 1 (Note 1) Notes: P/I/O Pin # Description O 1 Output Pin ( active Low ) P/I P/I 2 3 4 Ground No Connection Power Supply Voltage O 5 Output Pin ( active Low ) 1. Output1 responds to South pole; Output2 responds to North pole. 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 5 Unlimited -65 to +150 230 150 Unit V Conditions Operating Rating 1.65 to 3.3 Unit V Operating -40 to +85 °C °C mW °C Recommended Operating Conditions (TA = 25°C) Symbol Vdd TA Parameter Supply Voltage Operating Temperature Range AH1887 Document number: DS31313 Rev. 4 - 2 2 of 7 www.diodes.com August 2010 © Diodes Incorporated AH1887 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Electrical Characteristics (TA = 25°C, Vdd = 1.8V, unless otherwise specified) Symbol Characteristic Conditions VOH VOL Idd(en) Idd(dis) Idd(avg) Tawake Tperiod D.C. Output On Voltage (High side) Output On Voltage (Low side) IO= -0.5mA IO= 0.5mA Chip enable Chip disable average supply current Supply Current Awake Time Period Duty Cycle 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 % Magnetic Characteristics (TA = 25°C, Vdd = 1.8V~3.0V, Note 2, 3, 4) (1mT=10 Gauss) Symbol Characteristic 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 - 35 50 -50 -35 - 6 20 - - -20 -6 3 15 - Unit Gauss 2. Typical data is at Ta = 25°C, Vdd = 3V, and for design information only. 3. Bops & Brps for Output 1 responds to South pole; Bopn & Brpn for Output 2 responds to North pole. 4. The magnetic characteristics may vary with supply voltage, operating temperature and after soldering. Vdd ( off-state ) Turn on ( on-state ) N Output1 ( Output Voltage ) ( Output Voltage ) Output2 B hy Turn off Document number: DS31313 Rev. 4 - 2 Turn off Vsat Bopn Brpn 0 ( Magnetic flux density B ) AH1887 ( off-state ) Vsat S N 3 of 7 www.diodes.com Bhy Vdd Turn on ( on-state ) 0 Brps Bops ( Magnetic flux density B ) S August 2010 © Diodes Incorporated AH1887 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Typical Operating Characteristics Switching Point AH1887 Hysteresis vs. Vdd @ (TA=25 Degree C) AH1887 Hysteresis vs. Temperature (Vdd=1.8V) 40 40 30 30 20 10 Gauss(G) Bops 20 BrpS 10 Bopn 0 -50 -25 0 25 50 75 100 Brpn Brps Bopn Gauss(G) 0 1.8 -10 Bhys_s -10 -20 Bhys_n -20 -30 Bops 2.3 2.8 Brpn 3.3 Bhys_s Bhys_n -30 -40 -40 Vdd(V) Temperature (℃ ) Supply Current AH1887 Idd(avg.) vs. Vdd (TA=25 Degree C) AH1887 Idd(avg.) vs. Temperature 14 12 12 10 10 8 Idd(avg.) unit: uA 1.8V 6 2.5V Idd(avg.) unit: uA 8 Idd(avg.) unit: uA 6 4 4 2 2 0 -50 -25 0 25 50 75 0 100 1.8 AH1887 Document number: DS31313 Rev. 4 - 2 2.3 2.8 3.3 Vdd(V) Temperature (℃) 4 of 7 www.diodes.com August 2010 © Diodes Incorporated AH1887 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 1887 - Z G - 7 Device AH1887-ZG-7 Notes: Package Green Packing Z : SOT553 G : Green 7 : Tape & Reel Package Code Z Packaging (Note 5 & 6) SOT553 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 5. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 6. 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. AH1887 Document number: DS31313 Rev. 4 - 2 5 of 7 www.diodes.com August 2010 © Diodes Incorporated AH1887 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Marking Information (1) SOT553 ( Top View ) XX Y W X Part Number AH1887 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 KU 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° AH1887 Document number: DS31313 Rev. 4 - 2 6 of 7 www.diodes.com August 2010 © Diodes Incorporated AH1887 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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