AH1884 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH General Description Features • • • • • • • • • Micropower operation Operation with North or South Pole 1.65 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 SOT553: Available in “Green” Molding Compound (No Br, Sb) Lead Free Finish/RoHS Compliant (Note 1) AH1884 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. While the magnetic flux density (B) is larger than operate point (Bop), the output will be turned on (low), the output is held until B is lower than release point (Brp), then turned off. Applications • • • Cellular phone PDA Cordless phone Ordering Information AH1884 - X X X Note: Note: Package Lead Free Packing Z : SOT553 G : Green -7 : Taping 1. RoHS revision 13.2.2003. Glass and High Temperature Solder Exemptions Applied, see EU Directive Annex Notes 5 and 7. Device Package Code Packaging (Note 2) AH1884-Z Z SOT553 7” Tape and Reel Quantity Part Number Suffix 3000/Tape & Reel -7 2. 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. AH1884 Rev. 3 1 of 7 www.diodes.com JULY 2007 © Diodes Incorporated AH1884 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Pin Assignment ( Top View ) 5 1 4 2 3 SOT553 Pin Descriptions Name P/I/O Pin # Out 2 GND N.C Vdd Out 1 O P/I 1 2 3 4 5 P/I O Description Output Pin ( active High ) Ground Power Supply Voltage Output Pin ( active Low ) Block Diagram Vdd Power switch Offset Cancelling Hall Plate Amp Latch Out1 Logical Offset Cancelling Hall Plate Amp Latch GND Vdd Out2 GND AH1884 Rev. 3 2 of 7 www.diodes.com JULY 2007 © Diodes Incorporated AH1884 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Typical Circuit Vdd Output 1 AH1884 Output 2 Gnd Absolute Maximum Ratings Symbol Vdd B TA Ts PD TJ (at TA= 25°C) Characteristics Supply voltage Magnetic flux density Operating Temperature Range Storage Temperature Range Package Power Dissipation Maximum Junction Temperature Values 5 Unlimited -40 to +85 -65 to +150 230 150 Recommended Operating Conditions Symbol Vdd Parameter Electrical Characteristics Symbol VOH VOL Ioff Idd(en) Idd(dis) Idd(avg) Tawake Tperiod D.C. AH1884 Rev. 3 Operating Rating Unit 1.65~3.3 V (TA = +25°C, Vdd = 1.8V; unless otherwise specified) Characteristic Conditions Output On Voltage (High side) Output On Voltage (Low side) Output Leakage Current Supply Current °C °C mW °C (TA = 25°C ) Conditions Supply Voltage Unit V IO= -0.5mA IO= 0.5mA Output off Chip enable Chip disable average supply current Awake Time Period Duty Cycle 3 of 7 www.diodes.com Min Typ Max Unit Vdd-0.2 - <0.1 2 5 7 50 50 0.1 0.2 1 4 8 12 100 100 - V V µA mA uA uA µs ms % JULY 2007 © Diodes Incorporated AH1884 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Magnetic Characteristics (TA = 25°C, Vdd = 1 .8V~3.0V) (Note 3) (1mT=10 Gauss) Characteristic (Note 4) 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: Operate Point Release Point Min Typ Max -55 15 - 37 -37 29 -29 55 -15 3 8 - Hysteresis Gauss 3. Typical data is at Ta = 25°C, Vdd = 3V, and for design information only. 4. Operate point and release point will vary with supply voltage and operating temperature. Output1 Vcc ( off-state ) Turn off Turn on Bhy Output1 ( Output Voltage ) ( Output Voltage ) Unit ( on-state ) Vsat Bopn Brpn 0 ( Magnetic flux density B ) AH1884 Rev. 3 4 of 7 www.diodes.com ( off-state ) Turn off Vcc Bhy Turn on Vsat ( on-state ) 0 Brps Bops ( Magnetic flux density B ) JULY 2007 © Diodes Incorporated AH1884 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Typical Operating Characteristics Switching Point AH1884 Hysteresis vs Temp. (Vdd = 1.8V) AH1884 Hysteresis vs Vdd 50 40 40 30 20 Brpn Brpn 20 Bopn 10 Gauss(G) (Ta =25 Degree C) Gauss (G) 60 Bopn Brps 0 -10 -20 Bhys_n -30 Bhys_s Brps 0 Bops 1.8 2.3 2.8 Bhys_s -40 -40 -50 -50 -25 0 25 50 75 100 -60 Temp. ℃ Vdd(V) Supply Current AH1884 Idd(avg.) vs Temp. AH1884 Idd(avg.) vs Vdd 10 (Ta=25 Degree C) 12 9 10 8 Idd(avg.) unit : uA Idd(avg.) unit: uA 7 6 8 Icc (avg) uA 6 5 Vdd = 1.8V 4 4 Vdd = 2.5V 2 3 2 0 -50 -25 0 25 50 75 100 Temp. ℃ AH1884 Rev. 3 Bops Bhys_n -20 1.8 2.3 2.8 Vdd(V) 5 of 7 www.diodes.com JULY 2007 © Diodes Incorporated AH1884 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 o w e r D is s ip a tio n C u rv e P D (m W ) 300 200 100 0 0 25 50 75 85 100 125 150 T A (。 C ) Marking Information (1) SOT553 (Top View) XX : KR: AH1884 XX Y M X Part Number AH1884 AH1884 Rev. 3 Y : Year 0~9 M : Month A~L X : Internal code A~Z: Green Package SOT553 Identification Code KR 6 of 7 www.diodes.com JULY 2007 © Diodes Incorporated AH1884 MICROPOWER, ULTRA-SENSITIVE HALL EFFECT SWITCH Package Information (unit: mm) (1) Package Type: SOT553 1.50/1.70 0.30 C D 1.0Typ. 0.30 C D 0.10/0.18 ° 6°~8 0.10/0.20 0.1 C L 0.30 C 1.55/1.70 CL A Hall Sensor 1.10/1.25 D 0.2(5x) Top Package Btm Package 6°~ 8 0.10 M C A-B D Bottom View B 0.55/0.60 6°~8° Top View ° IMPORTANT NOTICE Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to any product herein. Diodes Incorporated does not assume any liability arising out of the application or use of any product described herein; neither does it convey any license under its patent rights, nor the rights of others. The user of products 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 our website, harmless against all damages. LIFE SUPPORT Diodes Incorporated products are not authorized for use as critical components in life support devices or systems without the expressed written approval of the President of Diodes Incorporated. AH1884 Rev. 3 7 of 7 www.diodes.com JULY 2007 © Diodes Incorporated