MAXIM DS75LVS+T&R

The DS75LV low-voltage (1.7V to 3.7V) digital thermometer and thermostat provides 9, 10, 11, or 12-bit digital temperature readings over a -55℃ to +125℃ range with ±2℃ accuracy over a -25℃ to +100℃ range. At power-up, the DS75LV defaults to 9-bit resolution for software compatibility with the LM75. Communication with the DS75LV is achieved through a simple 2-wire serial interface. The DS75LV thermostat has a dedicated open-drain output (OS) and programmable fault tolerance, which allows the user to define the number of consecutive error conditions that must occur before OS is activated. There are two thermostatic operating modes that control thermostat operation based on user-defined trip-points (TOS and THYST). The DS75LV measures temperature using a bandgap temperature sensing architecture. An on-board delta-sigma analog-to-digital converter (ADC) converts the measured temperature to a digital value that is calibrated in degrees centigrade; for Fahrenheit applications a lookup table or conversion routine must be used. The DS75LV is factory-calibrated and requires no external components to measure temperature. At power-up the DS75LV immediately begins converting temperature to a digital value. The resolution of the digital output data is user-configurable to 9, 10, 11, or 12 bits, corresponding to temperature increments of 0.5℃, 0.25℃, 0.125℃, and 0.0625℃, respectively, with 9-bit default resolution at power-up. The resolution is controlled via the R0 and R1 bits in the configuration register as explained in the Configuration Register section. Note that the conversion time doubles for each additional bit of resolution. After each temperature measurement and analog-to-digita conversion, the DS75LV stores the temperature as a 16-bit two’s complement number in the 2-byte temperature register. The sign bit (S) indicates if the temperature is positive or negative: for positive numbers s = 0 and for negative numbers S = 1. The most recently converted digital measurement can be read from the temperature register at any time. Since temperature conversions are performed in the background, reading the temperature register does not affect t

• Extend Performance Range with Low-Voltage, 1.7V to 3.7V Operating Range
• Maximize System Accuracy in Broad Range of Thermal Management Applications
• Measures Temperature from -55℃ to +125℃ (-67°F to +257°F)
• ±2℃ Accuracy over a -25℃ to 100℃ Range
• User-Configurable Resolution from 9 Bits (Default) to 12 Bits (0.5℃ to 0.0625℃)
• Easy Upgrade to LM75: Pin and Software Compatible
• Simplify Distributed Temperature-Sensing Applications with Multidrop Capability
• Up to Eight DS75LVs Can Operate on 2-Wire Bus
• Increase Reliability and System Robustness
• Internally Filtered Data Lines for Noise Immunity (50ns Deglitch)
• Bus Timeout Feature Prevents Lockup on 2-Wire Interface
• Minimize Power Consumption with Built-In Shutdown Mode
• Flexible User-Defined Thermostatic Modes with Programmable Fault Tolerance

• Personal Computers
• Cellular Base Stations
• Office Equipment
• Any Thermally Sensitive System