The DS1620 Digital Thermometer and Thermostat provides 9-bit temperature readings which indicate the temperature of the device. With three thermal alarm outputs, the DS1620 can also act as a thermostat. THIGH is driven high if the DS1620's temperature is greater than or equal to a user-defined temperature TH. TLOW is driven high if the DS1620's temperature is less than or equal to a user-defined temperature TL. TCOM is driven high when the temperature exceeds TH and stays high until the temperature falls below that of TL.
User-defined temperature settings are stored in nonvolatile memory, so parts can be programmed prior to insertion in a system, as well as used in standalone applications without a CPU. Temperature settings and temperature readings are all communicated to/from the DS1620 over a simple 3-wire interface.
Key Features
Applications/Uses
Requires no External Components
Supply Voltage Range Covers from 2.7V to 5.5V
Measures Temperatures from -55°C to +125°C in 0.5°C Increments; Fahrenheit Equivalent is -67°F to +257°F in 0.9°F Increments
Temperature is Read as a 9-Bit Value
Converts Temperature to Digital Word in 1 Second (max)
Thermostatic Settings are User-Definable and Nonvolatile
Data is Read from/Written via a 3-Wire Serial Interface (CLK, DQ, active-low RST)
Applications Include Thermostatic Controls, Industrial Systems, Consumer Products, Thermometers, or any Thermally Sensitive System
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