DS1621: Digital Thermometer and Thermostat Data Sheet (Rev. 4)4/3/2015518K
Features and Benefits
- Simply Adds Temperature Monitoring and Control to Any System
- 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 (2-Byte Transfer)
- Converts Temperature to Digital Word in Less than 1s
- Thermostatic Settings are User Definable And Nonvolatile
- Can Be Used in a Wide Variety of Applications
- Power Supply Range (2.7V to 5.5V)
- Data is Read From/Written Via a 2-Wire Serial Interface (Open Drain I/O Lines)
- Saves Space
- Temperature Measurements Require No External Components
- 8-pin DIP or SO package (208-mil) Packages
The DS1621 Digital Thermometer and Thermostat provides 9-bit temperature readings, which indicate the temperature of the device. The thermal alarm output, TOUT is active when the temperature of the device exceeds a user-defined temperature TH. The output remains active until the temperature drops below user defined temperature TL, allowing for any hysteresis necessary. User-defined temperature settings are stored in nonvolatile memory so parts may be programmed prior to insertion in a system. Temperature settings and temperature readings are all communicated to/from the DS1621 over a simple 2-wire serial interface.
- Personal Computing
- Test Measurement Systems
- Wireless Base Stations
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Documentation & Resources
DS1621 Reliability Data1/12/202372K
Understanding Multidrop Address Assignments for Thermal Sensors3/28/2014
Thermal Management Handbook5/4/2010
Package Thermal Resistance Values (Theta JA, Theta JC) for Temperature Sensors and 1-Wire Devices11/16/2006
Reverse Compatibility of the DS1721 Digital Temperature Sensor with the DS16215/31/2001
Tools & Simulations
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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