AH1891 MINIATURE MICROPOWER OMNIPOLAR HALL EFFECT SWITCH NEW PRODUCT Description Pin Assignments The AH1891 is a miniature micropower Omnipolar Hall effect switch IC with dual outputs specifically designed for portable and battery powered equipment such as cellular phones and portable PCs. To support battery powered equipment the AH1891 has been optimized to operate over the supply range of 1.8V to 3.3V and uses a sleep function to give an average supply current of only 7uA. To minimize PCB space the AH1891 is packaged in the small CSP package (0.8mmx0.8mm) and the design integrates the external pull up resistors to simplify the applications circuit. (Top View) A1 B1 The outputs of the AH1891 are switched with either a North or South pole of sufficient strength. When the magnetic flux density (B) is larger than operate point (Bop), Output 1 will pull low and Output 2 will be inverted (high). The output states are held until B is lower than release point (Brp). (Bottom View) A2 A2 A1 B2 B1 B2 The AH1891 is available in U-WLB0808-4 package. Features Applications • • • • • • • • • • • • • • Omnipolar (North or South) operation Low supply voltage of 1.8V to 3.3V Micropower operation Dual outputs for design flexibility Internal pull up and pull down capability Chopper stabilized design for: o Superior temperature stability o Superior temperature stability o Superior temperature stability Good RF noise immunity -40°C to 85°C Operating Temperature ESD ＞ 4KV in Human Body Mode Miniature CSP package 0.8mm x 0.8mm Cellular phones Portable PCs and PDAs Digital cameras Portable and battery powered applications Typical Application Circuit Output 1 Vdd AH1891 Output 2 GND AH1891 Document number: DS35207 Rev. 1 - 2 1 of 7 www.diodes.com April 2011 © Diodes Incorporated AH1891 MINIATURE MICROPOWER OMNIPOLAR HALL EFFECT SWITCH Pin # Pin Name Description A1 Out 1 Output Pin (active low) A2 Out 2 Output Pin (active high) B1 GND Ground B2 Vdd Power Supply Voltage Functional Block Diagram Vdd Hall Plate Power switch Offset Cancelling NEW PRODUCT Pin Descriptions Latch Amp Out1 Output Controller Offset Cancelling Hall Plate Amp GND Vdd Latch Out2 GND Absolute Maximum Ratings (TA = 25°C) Symbol Vdd B TA Ts PD TJ Parameter Supply voltage Magnetic flux density Operating Temperature Range Storage Temperature Range Values Unit 5 V Unlimited -40 to +85 -65 to +150 Package Power Dissipation Maximum Junction Temperature °C °C 166 150 mW °C Recommended Operating Conditions (TA = 25°C) Symbol Parameter Conditions Rating Unit Vdd Supply Voltage Operating 1.8 to 3.3 V AH1891 Document number: DS35207 Rev. 1 - 2 2 of 7 www.diodes.com April 2011 © Diodes Incorporated AH1891 MINIATURE MICROPOWER OMNIPOLAR HALL EFFECT SWITCH Electrical Characteristics (TA = 25°C, Vdd = 1.8V, unless otherwise specified) Symbol Min Typ. Max Unit VOH Output On Voltage (High side) Parameter IO= -0.5mA Vdd-0.2 - - V VOL Output On Voltage (Low side) IO= 0.5mA - V Output Leakage Current Output off - <0.1 0.2 Ioff 1 µA Chip enable - 2 4 mA NEW PRODUCT Idd(en) Idd(dis) Supply Current Idd(avg) Conditions Chip disable - 5 8 uA Average supply current - 7 12 uA 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~3.3V, Note 1) (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: Parameter (Note 2) Operate Point Release Point Min Typ. Max 20 40 60 -60 -40 -20 12 25 50 -50 -25 -12 Hysteresis Unit Gauss 15 1. Typical data is at TA = 25°C, Vdd = 3V, and for design information only. 2. Operate point and release point will vary with supply voltage and operating temperature. AH1891 Document number: DS35207 Rev. 1 - 2 3 of 7 www.diodes.com April 2011 © Diodes Incorporated AH1891 MINIATURE MICROPOWER OMNIPOLAR HALL EFFECT SWITCH Typical Operating Characteristics Switch Points Bop and Brp vs. Temperature Switch points vs. Temperature Vdd = 3.3V Switch points vs. Temperature Vdd = 1.8V 60 60 20 0 ‐20 40 Gauss (G) Gauss (G) Bops Brps Bopn Brpn Bhy_S Bhy_N ‐40 Bops Brps Bopn Brpn Bhy_S Bhy_N 20 0 ‐20 ‐40 ‐60 ‐60 ‐55 ‐40 ‐25 ‐10 5 20 35 50 65 80 95 ‐55 ‐40 ‐25 ‐10 Temperature (oC) 5 20 35 50 65 80 95 Temperature (oC) Switch Points Bop and Brp vs. Supply Voltage Switch points vs. Supply voltage TA = 25oC 60 Gauss (G) 40 Bops Brps Bopn Brpn Bhys_S Bhys_N 20 0 ‐20 ‐40 ‐60 1.5 1.8 2.1 2.4 2.7 3 3.3 Supply voltage Vdd (V) Average Supply Current vs. Temperature Average Supply Current vs. Supply Voltage Average supply current vs. Supply voltage TA = 25oC Average supply current vs. Temperature Vdd = 1.8V and 3.3V 35 30 25 1.8V 20 3.3V 15 10 5 0 ‐55 ‐40 ‐25 ‐10 5 20 35 Temperature (oC) AH1891 Document number: DS35207 Rev. 1 - 2 50 65 80 95 Avg. Supply Current Idd (uA) 40 Avg. Supply Current Idd (uA) NEW PRODUCT 40 20 18 15 Idd(avg) 13 10 8 5 3 0 1.5 1.8 2.1 2.4 2.7 3 3.3 Supply voltage Vdd (V) 4 of 7 www.diodes.com April 2011 © Diodes Incorporated AH1891 MINIATURE MICROPOWER OMNIPOLAR HALL EFFECT SWITCH Performance Characteristics (1) U-WLB0808-4 25 50 60 70 80 85 90 100 110 120 130 140 150 166 132 120 105 93 86 79 66 53 39 26 13 0 NEW PRODUCT TA (°C) PD (mW) P D (mW) Power Dissipation Curve (AH1891-CSP) 200 150 100 50 0 0-40 25 75 85 50 100 125 150 o TA ( C) Ordering Information AH1891 - CA4 - 7 Package Packing U-WLB0808-4 7 : Tape & Reel Device (Note 3) Package Code Packaging (Note 4) AH1891-CA4-7 CA4 U-WLB0808-4 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. AH1891 Document number: DS35207 Rev. 1 - 2 5 of 7 www.diodes.com April 2011 © Diodes Incorporated AH1891 MINIATURE MICROPOWER OMNIPOLAR HALL EFFECT SWITCH Marking Information (1) U-WLB0808-4 (Top View) A2 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 XX YWX B1 B2 Part Number Package Identification Code AH1891-CA4-7 U-WLB0808-4 A2 Package Outline Dimensions (All Dimensions in mm) 0.15 A (1) Package type: U-WLB0808-4 A B 0.40Ref. CL 0.40Ref. 0.40±0.020 CL Pin ID CL Hall sensor location CL 4x -? 0.1 7 2± 1 0.0 0.40±0.020 0.80±0.040 0.80±0.040 4x 0.08 C 0.40±0.020 CL 4- ? 0 .215 ± CL 0.01 0.05 MC AB AH1891 Document number: DS35207 Rev. 1 - 2 0.155±0.01 4x- 0.351±0.01 0.05 C 0.506Ref. Top Mark Land Pattern Recommendation (unit:mm) C 0.40±0.020 NEW PRODUCT A1 6 of 7 www.diodes.com April 2011 © Diodes Incorporated AH1891 MINIATURE MICROPOWER OMNIPOLAR HALL EFFECT SWITCH IMPORTANT NOTICE NEW PRODUCT 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. 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