The DS75U 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 DS75U defaults to 9-bit resolution for software compatibility with the LM75. Communication with the DS75U is achieved via a simple 2-wire serial interface. Three address pins allow up to eight DS75U devices to operate on the same 2-wire bus, which greatly simplifies distributed temperature sensing applications.The DS75U 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 DS75U is shown in Figure 1 and detailed pin descriptions are given in Table 2.
Feature
- Temperature Measurements Require No External Components
- Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
- ±2°C Accuracy Over a -25°C to +100°C Range
- Thermometer Resolution is User-Configurable from Nine (Default) to 12 Bits (0.5°C to 0.0625°C Resolution)
- 9-Bit Conversion Time is 150ms (Max)
- Thermostatic Settings are User-Definable
- Data is Read/Written Via 2-Wire Serial Interface (SDA and SCL Pins)
- Multidrop Capability Simplifies Distributed Temperature-Sensing Applications
- Wide Power-Supply Range (+2.7V to +5.5V).
- Pin/software Compatible with the LM75
- Available in 8-Pin μMAX? and SO Packages. See Table 1 for Ordering Information
- Applications Include Personal Computers, Cellular Base Stations, Office Equipment, or Any Thermally Sensitive System
Applications
- Any Thermally Sensitive System
- Cell Phone Base Stations
- Office Equipment
- Personal Computing
