Econ-Digital Thermometer and Thermostat

Part Number	Status	Replacement	Explanation
DS1720	This product is Not Recommended for New Designs. See Ordering Information for recommended replacements.	DS1726	The DS1726 is the next generation versions of the DS1720 digital thermometer and thermostat. While the DS1720 provides ±2.5°C accuracy, the DS1726 provides ±1.0°C accuracy and thermostat capability at a lower cost. Unlike the DS1720, the DS1726 allows the user to select 9-, 10-, 11-, or 12-bit output resolution by setting two bits in the configuration register. This provides simplified high resolution temperature measurements without the need to perform calculations.

The DS1720 Digital Thermometer and Thermostat provides 9-bit temperature readings which indicate the temperature of the device. With three thermal alarm outputs, the DS1720 can also act as a thermostat. T_HIGH is driven high if the DS1720's temperature is greater than or equal to a user-defined temperature T_H. T_LOW is driven high if the DS1720's temperature is less than or equal to a user-defined temperature T_L. T_COM is driven high when the temperature exceeds T_H and stays high until the temperature falls below that of T_L.

User-defined temperature settings are stored in non-volatile memory, so parts can be programmed prior to insertion in a system, as well as used in stand-alone applications without a CPU. Temperature settings and temperature readings are all communicated to/from the DS1720 over a simple 3-wire interface.

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