AH3781 HIGH-VOLTAGE HIGH-SENSITIVITY HALL EFFECT LATCH WITH INTERNAL PULL-UP RESISTOR PRELIMINARY - CONFIDENTIAL Description Pin Assignments The AH3781 is a high-voltage, high-sensitivity Hall Effect latch IC with internal pull-up resistor designed for commutation of brushless DC motors, flow meters, linear encoders and position sensors in industrial, consumer home appliance and personal care applications. To support a wide range of demanding applications, the design is optimized to operate over the supply range of 3.0V to 28V. With chopper stabilized architecture and an internal bandgap regulator to provide temperature compensated supply for internal circuits, the AH3781 provides a reliable solution over the whole operating range. For robustness and protection, the device has a Zener clamp on the supply. The output has an overcurrent limit and a Zener clamp. (Top View) 3 OUTPUT GND 2 1 VDD SOT23 (Top View) The internally pulled-up output can be switched on with South pole of sufficient strength and switched off with North pole of sufficient strength. When the magnetic flux density (B) perpendicular to the part marking surface is larger than the operate point (BOP) the output is 3. OUTPUT 2. GND 1. VDD switched on (pulled low). The output is held latched until magnetic flux density reverses and becomes lower than the release point (BRP). SIP-3 Features Applications • • • Bipolar Latch Operation (South Pole: On, North Pole: off) 3.0V to 28V Operating Voltage Range High Sensitivity: BOP and BRP of +25G and -25G Typical • • • Internally Pull-up Resistor on the Output Pin Output Overcurrent Limit Chopper Stabilized Design Provides Superior Temperature Stability Minimal Switch Point Drift Enhanced Immunity to Stress Good RF Noise Immunity Zener Clamp on Supply and Output Pins -40°C to +125°C Operating Temperature ESD (HBM): 6kV Industry Standard SOT23 and SIP-3 Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) • • • • • • • • • • • • Notes: Brushless DC Motor Commutation Revolution Per Minute (RPM) Measurement Flow Meters Angular and Linear Encoder and Position Sensors Contactless Commutation, Speed Measurement and Angular Position Sensing/Indexing in Consumer Home Appliances, Office Equipments and Industrial Applications 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. AH3781 Document number: DS37903 Rev. 1 - 2 1 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 PRELIMINARY - CONFIDENTIAL Typical Applications Circuit 3.0V to 28V VDD OUTPUT AH3781 CIN GND Note: 4. CIN is for power stabilization and to strengthen the noise immunity, the recommended capacitance is 10nF ~ 100nF. RL is the pull-up resistor. Pin Descriptions Package: SOT23 Pin Number Pin Name 1 VDD 2 3 GND OUTPUT Function Power Supply Input Ground Output Pin Functional Block Diagram VDD Power switch To All Subcircuits Amp Low-Pass Filter Sample and Hold Dynamic Offset Cancellation Amp OUTPUT Control Current Limit GND AH3781 Document number: DS37903 Rev. 1 - 2 2 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 Absolute Maximum Ratings (Notes 5 & 6) (@TA = +25°C, unless otherwise specified.) PRELIMINARY - CONFIDENTIAL Symbol Value Unit VDD Supply Voltage (Note 6) 32 V VDDR Reverse Supply Voltage -0.3 V VOUT_MAX Output Off Voltage (Note 6) 32V V IOUT Continuous Output Current 60 mA B Characteristic Magnetic Flux Density PD Package Power Dissipation Ts Storage Temperature Range TJ Maximum Junction Temperature ESD Notes: Unlimited 550 230 -65 to +165 SIP-3 SOT23 Electrostatic Discharge Withstand Capability - Human Body Model mW mW °C +150 °C 6 kV 5. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only; functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be affected by exposure to absolute maximum rating conditions for extended periods of time. 6. The absolute maximum VDD of 32V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate the device at the absolute maximum rated conditions for any period of time. Recommended Operating Conditions (@TA = -40°C to +125°C, unless otherwise specified.) Symbol VDD TA Rating Unit Supply Voltage Parameter Operating 3.0 to 28 V Operating Temperature Range Operating -40 to +125 °C Electrical Characteristics Symbol VOUT_ON IOUT_OFF Parameter Output On Voltage Output Leakage Current Supply Current RPU tST fc Internal Pull-Up Resistance Device Start-Up Time Chopping Frequency The time delay from magnetic threshold reached to the start of the output rise or fall Output Rising Time (external pull-up resistor RL and load capacitance dependent) Output Falling Time (Internal switch resistance and load capacitance dependent) Output Current Limit Zener Clamp Voltage tr tf IOCL VZ Notes: (Note 7 & 8) (@TA = -40°C to +125°C, VDD = 3V to 28V, unless otherwise specified.) IDD td Conditions Conditions Min - Typ 0.2 - <0.1 15 µA 10 - 3.8 3.8 14 10 800 4.9 5.8 18 - mA mA kΩ µs kHz (Note 9) - 3.75 - µs RL =1kΩ, CL = 20pF - 0.2 1 µs RL =1kΩ, CL = 20pF - 0.1 1 µs B > BOP, (Note 10 ) IDD = 5mA 30 28 - 55 - mA V IOUT = 20mA, B > BOP VOUT = 28V, B < BRP, Output off Output open, VDD = 12V , TA = +25°C Output open, TA = -40°C to +125°C TA = -40°C to +125°C VDD >= 3V, B > BOP (Note 7) VDD = 3V to 28V Max 0.4 Unit V 7. When power is initially turned on, VDD must be within its correct operating range (3.0V to 28V) to guarantee the output sampling. The output state is valid after the start-up time of 10µs typical from the operating voltage reaching 3V. 8. Typical values are defined at TA = +25°C, VDD = 12V. Maximum and minimum values over the operating temperature range is not tested in production but guaranteed by design, process control and characterization 9. Guaranteed by design, process control and characterization. Not tested in production. 10. The device will limit the output current IOUT to current limit of IOCL. AH3781 Document number: DS37903 Rev. 1 - 2 3 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 Magnetic Characteristics (Notes 11 &12) (TA = -40°C to +125°C, VDD = 3.0V to 28V, unless otherwise specified) Parameter Conditions BOP (South pole to part marking side) Operation Point BRP (North pole to part marking side) Release Point BHY (|BOPX|-|BRPX|) Notes: VDD = 12V, TA = +25°C TA = -40°C to +125°C VDD = 12V, TA = +25°C TA = -40°C to +125°C VDD = 12V, TA = +25°C TA = -40°C to +125°C Hysteresis (Note 13) Min 10 -40 -20 Typ 25 25 -25 -25 50 50 (1mT=10 Gauss) Max Unit 40 Gauss -10 80 11. When power is initially turned on, VDD must be within its correct operating range (3.0V to 28V) to guarantee the output sampling. The output state is valid after the start-up time of 10µs typical from the operating voltage reaching 3V. 12. Typical values are defined at TA = +25°C, VDD = 12V. Maximum and minimum values over the operating temperature range is not tested in production but guaranteed by design, process control and characterization 13. Maximum and minimum hysteresis is guaranteed by design, process control and characterization. Output VDD (off-state) ( Output Voltage ) PRELIMINARY - CONFIDENTIAL Symbol Bhy Turn off Turn on (on-state) VOUT_ON = VSAT Brp 0 Bop ( Magnetic Flux Density B ) S S Part mark Part mark AH3781 Document number: DS37903 Rev. 1 - 2 N N (SOT23) (SIP-3) 4 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 TA = +25oC Bop Brp 2 Gauss (G) Hyst Gauss (G) 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 4 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 6 8 10 12 14 16 18 20 22 24 26 28 VDD = 3V Hyst Bop Brp -50 -25 0 25 50 75 100 125 Supply Voltage (V) Temperature (oC) Switch Points Bop and Brp vs Supply Voltage Switch Points Bop and Brp vs Temperature VDD = 12V Hyst Bop Brp -50 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 -80 30 Gauss (G) Gauss (G) Magnetic Operating Switch Points – BOP and BRP -25 0 25 50 75 100 125 70 60 50 40 30 20 10 0 -10 -20 -30 -40 -50 -60 -70 150 VDD = 28V 150 Hyst Bop Brp -50 -25 0 25 o 50 75 100 125 150 o Temperature ( C) Temperature ( C) Switch Points Bop and Brp vs Temperature Switch Points Bop and Brp vs Temperature Supply Current 7.0 7.0 TA = +25 C Supply Current IDD (mA) Supply Current IDD (mA) PRELIMINARY - CONFIDENTIAL Typical Operating Characteristics 6.0 5.0 4.0 3.0 2.0 1.0 28V 6.0 5.0 4.0 3.0 12V 2.0 3V 1.0 0.0 0.0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 Supply Voltage (V) Temperature (oC) Supply Current vs Supply Voltage Supply Current vs Temperature AH3781 Document number: DS37903 Rev. 1 - 2 5 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 Typical Operating Characteristics TA = +25 C Output On Voltage VOUT_ON (V) Output On Voltage VOUT_ON (V) 0.4 0.3 0.2 0.1 0.0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 0.4 28V 0.3 0.2 3V 12V 0.1 0.0 -50 -40 -30 -20 -10 30 0 10 20 30 40 50 60 70 80 90 100 110 120 130 Temperature (oC) Supply Voltage (V) Output On Voltage vs Temperature Output On Voltage vs Supply Voltage 20.0 TA = +25 C 16.0 12.0 8.0 4.0 0.0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 Internal Pull-up Resistor RPU (kW ) Internal Pull-up Resistor RPU (kW ) Output Pull-Up Resistor (Internal) 20.0 28V 16.0 12.0 3V 12V 8.0 4.0 0.0 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 Temperature (oC) Supply Voltage (V) Internal Output Pull-up Resistor vs Temperature Internal Output Pull-up Resistor vs Supply Voltage 70 Output Current Limit IOCL (mA) Output Current Limit Output Current Limit IOCL (mA) PRELIMINARY - CONFIDENTIAL Output Switch On Voltage TA = +25 C 60 50 40 30 20 10 0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 60 28V 50 40 3V 30 20 10 0 -50 -40 -30 -20 -10 10 20 30 40 50 60 70 80 90 100 110 120 130 Output Current Limit vs Temperature Output Current Limit vs Supply Voltage Document number: DS37903 Rev. 1 - 2 0 Temperature (oC) Supply Voltage (V) AH3781 12V 6 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 Thermal Performance Characteristics Package Type: SOT23 TA (°C) 25 50 60 70 80 85 90 100 105 110 120 125 130 140 150 PD (mW) 230 184 166 147 129 120 110 92 83 74 55 46 37 18 0 Power Dissipation Curve 300 Power Dissipation PD (mW) PRELIMINARY - CONFIDENTIAL (1) 200 100 0 -40 0 25 50 75 100 Ambient Temperature TA (2) 125 150 (oC) Package type: SIP-3 TA (°C) 25 50 60 70 80 85 90 100 105 110 120 125 130 140 150 PD (mW) 550 440 396 362 308 286 264 220 198 176 132 110 88 44 0 PD (mW) Power Dissipation Curve 600 500 400 300 200 100 0 -40 0 25 50 75 100 125 150 TA (°C) AH3781 Document number: DS37903 Rev. 1 - 2 7 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 PRELIMINARY - CONFIDENTIAL Ordering Information AH3781 - XXX - X Packing Package 7 : Tape & Reel A: Ammo Box (Note 14) B: Bulk (Note 15) P : SIP-3 SA : SOT23 Part Number Package Code Packaging AH3781-P-A P SIP-3 Quantity 7” Tape and Reel Part Number Quantity Suffix Bulk Part Number Suffix NA NA NA Ammo Box Quantity Part Number Suffix NA 4,000/Box -A NA NA AH3781-P-B P SIP-3 1,000 -B NA NA NA AH3781-SA-7 SA SOT23 NA NA 3,000/Tape & Reel -7 NA Notes: 14. Ammo Box is for SIP-3 Spread Lead. 15. Bulk is for SIP-3 Straight Lead. Marking Information (1) Package Type: SOT23 ( Top View ) XX Y W X Part Number AH3781 (2) XX : Identification code Y : Year 0 to 9 W : Week : A to Z : 1 to 26 week; a to z : 27 to 52 week; z represents 52 and 53 week X : Internal code Package SOT23 Identification Code WX Package Type: SIP-3 ( Top View ) Part Number 3781 Y WW X Part Number AH3781 AH3781 Document number: DS37903 Rev. 1 - 2 Y : Year : 0~9 WW : Week : 01~52, "52" represents 52 and 53 week X : Internal Code Package SIP-3 8 of 13 www.diodes.com Identification Code 3781 September 2015 © Diodes Incorporated AH3781 Package Outline Dimensions (All dimensions in mm.) (1) Package Type: SOT23 All 7° H K1 GAUGE PLANE 0.25 J K SOT23 Dim Min Max Typ A 0.37 0.51 0.40 B 1.20 1.40 1.30 C 2.30 2.50 2.40 D 0.89 1.03 0.915 F 0.45 0.60 0.535 G 1.78 2.05 1.83 H 2.80 3.00 2.90 J 0.013 0.10 0.05 K 0.890 1.00 0.975 K1 0.903 1.10 1.025 L 0.45 0.61 0.55 L1 0.25 0.55 0.40 M 0.085 0.150 0.110 a 8° All Dimensions in mm a M A L C L1 B D F G 0.17/0.37 Min/Max PART MARKING SURFACE 0.5/0.7 PRELIMINARY - CONFIDENTIAL Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. Die Hall Sensor Pin1 1.4/1.5 Sensor Location AH3781 Document number: DS37903 Rev. 1 - 2 9 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 Package Outline Dimensions (cont.) (All dimensions in mm.) Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. Package Type: SIP-3 Bulk SIP-3 (Bulk) Dim Min Max A 3.9 4.3 a1 5° Typ a2 5°Typ a3 45° Typ a4 3°Typ B 2.8 3.2 C 1.40 1.60 D 0.33 0.432 E 0.40 0.508 F 0 0.2 G 1.24 1.30 H 2.51 2.57 J 0.35 0.43 L 14.0 15.0 N 0.63 0.84 P 1.55 All Dimensions in mm L a1 J a2 B P N D C A a3 E a4 G H F Min/Max 0.63/0.84 0.27/0.48 1.90/2.10 1.05/1.25 PART MARKING SURFACE Hall Sensor 1 2 Die PRELIMINARY - CONFIDENTIAL (2) PART MARKING SURFACE 3 Sensor Location AH3781 Document number: DS37903 Rev. 1 - 2 10 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 Package Outline Dimensions (cont.) (All dimensions in mm.) Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version. Package Type: SIP-3 Ammo Pack N D EF SIP-3 (Ammo Pack) Dim Min Max A 3.9 4.3 a1 45° Typ a2 3° Typ B 2.8 3.2 C 1.40 1.60 D 0.35 0.41 E 0.43 0.48 F 0 0.2 G 2.4 2.9 N 0.63 0.84 P 1.55 All Dimensions in mm C A G a1 a2 B P Min/Max 0.63/0.84 0.27/0.48 1.90/2.10 1.05/1.25 PART MARKING SURFACE Hall Sensor 1 2 Die PRELIMINARY - CONFIDENTIAL (3) PART MARKING SURFACE 3 Sensor Location AH3781 Document number: DS37903 Rev. 1 - 2 11 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 Suggested Pad Layout PRELIMINARY - CONFIDENTIAL Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version. (1) Package Type: SOT23 Dimensions Value (in mm) Z 2.9 X 0.8 Y 0.9 C 2.0 E 1.35 Y Z C X AH3781 Document number: DS37903 Rev. 1 - 2 E 12 of 13 www.diodes.com September 2015 © Diodes Incorporated AH3781 PRELIMINARY - CONFIDENTIAL 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. 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Copyright © 2015, Diodes Incorporated www.diodes.com AH3781 Document number: DS37903 Rev. 1 - 2 13 of 13 www.diodes.com September 2015 © Diodes Incorporated