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DS75LV：Digital Thermometer and Thermostat

±2.0°C Accurate Digital Temperature Sensor Operates From a Supply of Only 1.7V to 3.7V

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°C to +125°C range with ±2°C accuracy over a -25°C to +100°C 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. Three address pins allow up to eight DS75LV devices to operate on the same 2-wire bus, which greatly simplifies distributed temperature-sensing applications. The DS75LV thermostat has a dedicated open-drain output (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). A block diagram of the DS75LV is shown in Figure 1 and detailed pin descriptions are given in Table 1 of the full data sheet.

Key Features 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°C to +125°C (-67°F to +257°F) ±2°C Accuracy over a -25°C to 100°C Range User-Configurable Resolution from 9 Bits (Default) to 12 Bits (0.5°C to 0.0625°C) 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

DS75LV: Functional Block Diagram Applications/Uses Any Thermally Sensitive System Cellular Base Stations Office Equipment Personal Computers

DataSheet

Parametrics

Quality and Environmental Data

• DS75LV.pdf

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