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ATS344 Datasheet(PDF) 2 Page - Allegro MicroSystems |
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ATS344 Datasheet(HTML) 2 Page - Allegro MicroSystems |
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2 / 36 page  High-Precision Linear Hall-Effect Sensor IC with Two-Wire Current-Mode PWM Output and an Integrated Rare-Earth Pellet Package ATS344 2 Allegro MicroSystems, LLC 955 Perimeter Road Manchester, NH 03103-3353 U.S.A. www.allegromicro.com ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Unit Forward Supply Voltage VCC 20 V Reverse Supply Voltage VRCC –20 V Forward Supply Current ICC 30 mA Reverse Supply Current IRCC –30 mA Operating Ambient Temperature TA L temperature range –40 to 150 °C Maximum Junction Temperature TJ(max) 165 °C Storage Temperature Tstg –65 to 165 °C RoHS COMPLIANT SELECTION GUIDE Part Number Package Packing [1] Leadframe Plating ATS344LSPTN-T 3-pin SIP 13-inch reel 100% matte tin [1] Contact Allegro™ for additional packing options THERMAL CHARACTERISTICS: May require derating at maximum conditions; see application information Characteristic Symbol Test Conditions [2] Value Units Package Thermal Resistance RθJA Single-sided PCB, copper limited to solder pads, 2 pins (center pin removed) 159 °C/W Single-sided PCB, copper limited to solder pads, 3 pins 146 °C/W [2] Additional information is available on the Allegro website. With on-board EEPROM and advanced signal processing functions, the ATS344 provides an unmatched level of customer reprogrammable options for characteristics such as gain and offset, bandwidth, and output clamps. In addition, the device supports separate hot and cold temperature compensation. The ATS344 in the 3-pin SIP package (SP suffix) complies with the requirements of EU Directive 2002/95/EC (RoHS) and 2011/65/EU (RoHS II), amended by 2015/863/EU, on the Restriction of the use of certain Hazardous Substances in electrical and electronic equipment. The package contains an integrated SmCo rare-earth pellet. DESCRIPTION (continued) Table of Contents Features and Benefits ........................................................... 1 Description .......................................................................... 1 Package ............................................................................. 1 Selection Guide ................................................................... 2 Absolute Maximum Ratings ................................................... 2 Thermal Characteristics ........................................................ 2 Functional Block Diagram ..................................................... 3 Pinout Diagram and Terminal List ........................................... 3 Electrical Characteristics ....................................................... 4 Magnetic Characteristics ....................................................... 5 Programmable Characteristics ............................................... 6 Reference Target Characteristics ........................................... 8 Functional Description ........................................................ 10 Digital Signal Processing ................................................. 10 Protection Features ......................................................... 12 Typical Application .......................................................... 13 Programmable Serial Interface ............................................. 14 Transaction Types ........................................................... 14 Writing the Access Code .................................................. 14 Reading from EEPROM ................................................... 15 Error Checking ............................................................... 15 Timing Diagrams ................................................................ 16 Serial Write to Volatile Memory ......................................... 16 Serial Write to EEPROM .................................................. 17 Serial Read from EEPROM .............................................. 18 Serial Access Timeout ..................................................... 19 Serial Interface Message Structure ....................................... 21 Output Protocol .................................................................. 24 PWM Output .................................................................. 24 EEPROM Structure ............................................................ 25 EEPROM Customer-Programmable Parameter Reference ... 26 Definitions of Terms ............................................................ 33 Package Outline Drawing .................................................... 35 |
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