AH1804

AH1804 MICROPOWER OMNIPOLAR HALL EFFECT SENSOR SWITCH Description The AH1804 is a micropower Omnipolar Hall effect switch IC with a single output driver with internal pull up and pull down capability. Designed for portable and battery powered equipment such as cellular phones and portable PCs the average supply current is only 12µA at 3.3V. To support battery powered equipment the AH1804 can operate over the supply range of 2.5V to 3.6V and uses a hibernating clocking system to minimize the power consumption. The output is activated with either a north or south pole of sufficient strength. When the magnetic flux density (B) is larger than operate point (Bop), the output will be turned on (pulled low) and held until B is lower than release point (Brp). Pin Assignments ( Top View ) GND NC 4 3 N EW PRODUCT 1 2 VDD Output DFN1216-4 Features • • • • • Omnipolar operation (North or South pole) Low supply voltage 2.5V to 3.6V Micropower operation No external pull up resistors required Chopper stabilized design o Superior temperature stability o Extremely Low Switch-Point Drift o Insensitive to Physical Stress Good RF noise immunity -40°C to 85°C operating temperature Small low profile DFN1216-4 package ESD (HBM) ＞ 5KV “Green” Molding Compound Applications • • • • Cover switch in clam-shell and slide cellular phones Cover switch in portable PC’s, Tablets and PDA Display screen open/close detect in Digital camcorders Contact-less switch in portable battery powered consumer products • • • • • Typical Application Circuit VDD 2.5V to 3.6V Cin AH1804 Output GND Note: Cin is for power stabilization and to strengthen the noise immunity, C = 100nF or higher must be used. AH1804 Document number: DS35314 Rev. 1 - 2 1 of 9 www.diodes.com June 2011 © Diodes Incorporated AH1804 MICROPOWER OMNIPOLAR HALL EFFECT SENSOR SWITCH Pin Descriptions Pin Name VDD GND Output NC Notes: P/I/O P/I P/I O NC Power Supply Input Ground Output Pin Description No Connection (Note 1) N EW PRODUCT 1. NC is “No Connection” which is not connected internally. This pin can be left open or tied to ground. Functional Block Diagram VDD Sleep/Awake Logic and Power Switch Hall Plate Offset Cancellation Amp Latch Output Driver Controller Output GND Hall Plate Absolute Maximum Ratings (TA = 25°C, Note 2) Symbol VDD VDD rev B Ts PD TJ Notes: Characteristics Supply voltage (Note 3) Reverse supply voltage Magnetic flux density Storage Temperature Range Package Power Dissipation Maximum Junction Temperature DFN1216-4 2. Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Exposure to absolute maximum rating condition for extended periods may affect device reliability. 3. The absolute maximum of 5V is a transient stress rating and is not meant as functional operating conditions. It is not recommended to operate the device at the absolute maximum rated conditions for any period of time. Offset Cancellation Amp Latch Values 5.0 -0.3 Unlimited -65 to +150 230 150 Unit V V °C mW °C AH1804 Document number: DS35314 Rev. 1 - 2 2 of 9 www.diodes.com June 2011 © Diodes Incorporated AH1804 MICROPOWER OMNIPOLAR HALL EFFECT SENSOR SWITCH Recommended Operating Conditions (TA = 25°C) Symbol VDD TA Notes: Characteristics Supply Voltage Operating Temperature Range Conditions CIN =0.1µF (Note 4) Operating Rating 2.5 to 3.6 -40 to +85 Unit V °C 4. Decoupling capacitor CIN = 100nF or higher must be used for full 2.5V to 3.6V supply range. N EW PRODUCT Electrical Characteristics (TA = 25°C, VDD = 3.3V, unless otherwise specified) Symbol VOL VOH Idd(en) Idd(dis) Idd(avg) Tawake Tperiod D.C. Notes: Characteristics Output Low Voltage (on) Output High Voltage (off) Supply current Awake Time Period Duty Cycle IOUT = 1mA IOUT = -1mA Chip enable Chip disable Conditions Min ⎯ VDD-0.2 ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ Typ. 0.1 VDD-0.1 4 8 12 50 50 0.1 Max 0.2 ⎯⎯ ⎯ ⎯ ⎯ 100 100 ⎯ Unit V V mA µA µA µs ms % Average supply current, (Note 5) (Note 5) 5. When power is initially on, the operating VDD (2.5V to 3.6V) must be applied to be guaranteed for the output sampling. The output state is valid after the second operating phase (typical 100ms). AH1804 Document number: DS35314 Rev. 1 - 2 3 of 9 www.diodes.com June 2011 © Diodes Incorporated AH1804 MICROPOWER OMNIPOLAR HALL EFFECT SENSOR SWITCH Magnetic Characteristics (TA = 25°C, VDD = 3.3V, Note 6) 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: Characteristics Operation Point Release Point Hysteresis (1mT=10 Gauss) Min Typ. 20 -60 15 40 -40 32 -32 8 Max 60 -20 -15 - Unit Gauss N EW PRODUCT 6. The magnetic characteristics may vary with operating temperature and after soldering. Output ( Output Voltage ) ( Output Voltage ) Output Vcc ( off-state ) Bhy ( off-state ) Vcc Turn on Turn off Turn off Bhy Turn on ( on-state ) Vsat Vsat ( on-state ) Bopn Brpn 0 ( Magnetic flux density B ) 0 Brps Bops ( Magnetic flux density B ) AH1804 Document number: DS35314 Rev. 1 - 2 4 of 9 www.diodes.com June 2011 © Diodes Incorporated AH1804 MICROPOWER OMNIPOLAR HALL EFFECT SENSOR SWITCH Typical Characteristics Typical Switch Point Bop and Brp vs. Temperature Typical Switch Points Bop and Brp vs. Supply Voltage N EW PRODUCT Average Supply Current vs. Temperature Average Supply Current vs. Supply Voltage AH1804 Document number: DS35314 Rev. 1 - 2 5 of 9 www.diodes.com June 2011 © Diodes Incorporated AH1804 MICROPOWER OMNIPOLAR HALL EFFECT SENSOR SWITCH Ordering Information AH1804 - FA - 7 X Magentic Characteristics - Blank : Option 1 (Note 7) Magentic Characteristics (Note 7) -Blank Package Packing 7 : Tape & Reel N EW PRODUCT FA : DFN1216-4 Device (Note 8) AH1804-FA-7 Notes: Package Code FA Packaging (Note 9) DFN1216-4 7” Tape and Reel Quantity 3000/Tape & Reel Part Number Suffix -7 7. Please refer the Magnetic Characteristics table. 8. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at http://www.diodes.com/products/lead_free.html. 9. 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 Marking Information (1) DFN1216-4 ( Top View ) Pin 1 indicator XX Y WX 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 : Internal code Package DFN1216-4 Identification Code KJ Part Number AH1804-FA-7 AH1804 Document number: DS35314 Rev. 1 - 2 6 of 9 www.diodes.com June 2011 © Diodes Incorporated AH1804 MICROPOWER OMNIPOLAR HALL EFFECT SENSOR SWITCH Package Outline Dimensions (All Dimensions in mm) (1) Package type: DFN1216-4 0/0.05 0.13Typ. Seating Plane C Top Mark 0.47/0.53 0.10 C N EW PRODUCT 4x 0.08 C Side View 0.25 A 0.65Typ. 2X- 1.15/1.25 0.65Typ. Pin#1 0.35(4x) C L C0.2 Hall sensor 0.2/0.3(4x) C L 0.25(4x) 1.0 1.55/1.65 0.55/0.75 0.75/0.95 2X0.25 B 0.175(4x) Top View Land Pattern Recommendation (Unit:mm) 0.15/0.25 (4x) 0.10 CAB Bottom View AH1804 Document number: DS35314 Rev. 1 - 2 7 of 9 www.diodes.com 0.8 1.40 B A June 2011 © Diodes Incorporated AH1804 MICROPOWER OMNIPOLAR HALL EFFECT SENSOR SWITCH Taping Orientation (Note 10) DFN1216-4 N EW PRODUCT Notes: 10. The taping orientation of the other package type can be found on our website at http://www.diodes.com/datasheets/ap02007.pdf. AH1804 Document number: DS35314 Rev. 1 - 2 8 of 9 www.diodes.com June 2011 © Diodes Incorporated AH1804 MICROPOWER OMNIPOLAR HALL EFFECT SENSOR 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). 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