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DS7505U Datasheet(PDF) 1 Page - Maxim Integrated Products |
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DS7505U Datasheet(HTML) 1 Page - Maxim Integrated Products |
1 / 14 page General Description The DS7505 low-voltage (1.7V to 3.7V) digital ther- mometer and thermostat provides 9-, 10-, 11-, or 12-bit digital temperature readings over a -55°C to +125°C range with ±0.5°C accuracy over a -0°C to +70°C range. A 9-bit resolution mode is software compatible with the LM75. Communication with the DS7505 is achieved through a simple 2-wire serial interface. Three address pins allow up to eight DS7505 devices to operate on the same 2-wire bus, which greatly simplifies distributed temperature-sensing applications. The DS7505 thermostat has a dedicated open-drain out- put (O.S.) and programmable fault tolerance, which allows the user to define the number of consecutive error conditions that must occur before O.S. is activated. There are two thermostatic operating modes that control thermostat operation based on user-defined trip points (TOS and THYST) that are stored in EEPROM registers. Applications Networking Equipment Cellular Base Stations Office Equipment Medical Equipment Any Thermally Sensitive System Features o Operating Range from 1.7V to 3.7V o Temperature Measurements Require No External Components o Measures Temperatures from -55°C to +125°C (-67°F to +257°F) o ±0.5°C Accuracy Over a 0°C to +70°C Range o Thermometer Resolution is User-Configurable from 9 (Default) to 12 Bits (0.5°C to 0.0625°C Resolution) o 9-Bit Conversion Time is 25ms (max) o Thermostatic Settings are User-Definable and Nonvolatile (NV) o Stand-Alone Thermostat Capability o Data Read/Write Occurs Through a 2-Wire Serial Interface (SDA and SCL Pins) o Data Lines Filtered Internally for Noise Immunity (50ns Deglitch) o Optional Bus Timeout Feature Prevents Lockup Problems on 2-Wire Interface o Multidrop Capability Simplifies Distributed Temperature-Sensing Applications o Pin/Software Compatible with the LM75 o Available in 8-Pin SO and µMAX® Packages Digital Thermometer and Thermostat ________________________________________________________________ Maxim Integrated Products 1 SO TOP VIEW 27 A0 SCL 1 8 VDD SDA A1 O.S. 3 6 A2 GND 45 DS7505 µ µMAX 27 A0 SCL 1 8 VDD SDA A1 O.S. 3 6 A2 GND 4 5 DS7505 Pin Configurations Ordering Information Rev 1; 3/08 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. PART TEMP RANGE PIN-PACKAGE DS7505S+ -55°C to +125°C 8 SO (150 mils) DS7505S+T&R -55°C to +125°C 8 SO (150 mils), 2500-Piece T&R DS7505U+ -55°C to +125°C 8 µMAX DS7505U+T&R -55°C to +125°C 8 µMAX, 3000-Piece T&R +Denotes a lead-free package. T&R = Tape and reel. µMAX is a registered trademark of Maxim Integrated Products, Inc. Commands are capitalized for clarity. |
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