DS7505 Digital Thermometer and Thermostat General Description Benefits and Features The DS7505 low-voltage (1.7V to 3.7V) digital thermom- Extends Performance Range with a Low-Voltage, eter and thermostat provides 9-, 10-, 11-, or 12-bit digital 1.7V to 3.7V Operating Range temperature readings over a -55C to +125C range with Maximizes System Accuracy in Broad Range of 0.5C accuracy over a -0C to +70C range. A 9-bit reso- Thermal Management Applications lution mode is software compatible with the LM75. Measures Temperature from -55C to +125C The DS7505 thermostat has a dedicated open-drain (-67F to +257F) 0.5C Accuracy Over a 0C to +70C Range output (O.S.) and programmable fault tolerance, which User-Configurable Resolution from 9 Bits (Default) allows the user to define the number of consecutive error to 12 Bits (0.5C to 0.0625C Resolution) conditions that must occur before O.S. is activated. There are two thermostatic operating modes that control thermo- Reduces Cost with No External Components and stat operation based on user-defined trip points (T and OS Stand Alone Thermostat Capability T ) that are stored in EEPROM registers. HYST Increases Reliability and System Robustness Internally Filtered Data Lines for Noise Immunity Applications (50ns Deglitch) Networking Equipment Bus Timeout Feature Prevents Lockup on a 2-Wire Cellular Base Stations Interface Office Equipment Simplifies Distributed Temperature-Sensing Medical Equipment Applications with Multidrop Capability Up to Eight Devices Can Operate on a 2-Wire Bus Any Thermally Sensitive System Fast 25ms (max) 9-Bit Conversion Time Flexible and Nonvolatile (NV) User-Defined Pin Configurations Thermostatic Mode s TOP VIEW SDA 1 8 VDD Ordering Information DS7505 SCL 2 7 A0 PART TEMP RANGE PIN-PACKAGE O.S. 3 6 A1 DS7505S+ -55C to +125C 8 SO (150 mils) GND 4 5 A2 8 SO (150 mils), DS7505S+T&R -55C to +125C 2500-Piece T&R SO DS7505U+ -55C to +125C 8 MAX SDA 1 8 VDD 8 MAX, DS7505U+T&R -55C to +125C SCL 2 DS7505 7 A0 3000-Piece T&R O.S. 3 6 A1 +Denotes a lead(Pb)-free/RoHS-compliant package. GND 4 5 A2 T&R = Tape and reel. MAX Commands are capitalized for clarity. MAX is a registered trademark of Maxim Integrated Products, Inc. 19-7471 Rev 3 12/15DS7505 Digital Thermometer and Thermostat Absolute Maximum Ratings Voltage Range on VDD Relative to Ground .........-0.3V to +4.0V Operating Temperature Range ......................... -55C to +125C Voltage Range on Any Other Pin Storage Temperature Range ............................ -55C to +125C Relative to Ground............................................-0.3V to +6.0V Soldering Temperature ......................... Refer to the IPC/JEDEC J-STD-020 Specification. Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. DC Electrical Characteristics (1.7V V 3.7V, T = -55C to +125C, unless otherwise noted.) DD A PARAMETER SYMBOL CONDITIONS MIN MAX UNITS Supply Voltage V 1.7 3.7 V DD Input Voltage Range (SDA, SCL, (Note 1) -0.3 +5.5 V O.S., A0, A1, A2) 0C to +70C 0.5 Thermometer Error T C ERR (Note 2, 3) -55C to +125C 2.0 Input Logic-High V (Note 1) 0.7 x V V IH DD Input Logic-Low V (Note 1) 0.3 x V V IL DD SDA Output Logic-Low Voltage V 6mA sink current (Note 1) 0 0.6 V OL1 O.S. Saturation Voltage V 4mA sink current (Notes 1, 2) 0.8 V OL2 Input Current Each I/O pin 0.4V < V < 0.9 x V -10 +10 A I/O DD I/O Capacitance C 10 pF I/O Standby Current I (Notes 4, 5, 6) 2 A DD1 Active temp conversions 750 Active Current I Communication only 100 A DD (Notes 4, 5, 6) 2 E Copy only 500 AC Electrical Characteristics (1.7V V 3.7V, T = -55C to +125C, unless otherwise noted.) DD A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Resolution 9 12 Bits 9-bit conversions 25 10-bit conversions 50 Temperature Conversion Time t ms CONVT 11-bit conversions 100 12-bit conversions 200 SCL Frequency f 400 kHz SCL EEPROM Copy Time t -40C to +85C 10 ms WR -40C T +85C (Note 7) 10k 20k A EEPROM Copy Endurance N Cycles EEWR T = +25C (Note 7) 40k 80k A Maxim Integrated 2 www.maximintegrated.com