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Digital Thermometer with SPI/3-Wire Interface

Product Details

Key Features

Applications/Uses

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 3-Wire/SPI
Accuracy (±°C) 2
Parasite Pwr. No
Temp. Resolution (bits) 8
9
10
11
12
Oper. Temp. (°C) -55 to +125
Package/Pins SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
1.25
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Simplified Block Diagram

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Parameters

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 3-Wire/SPI
Accuracy (±°C) 2
Parasite Pwr. No
Temp. Resolution (bits) 8
9
10
11
12
Oper. Temp. (°C) -55 to +125
Package/Pins SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
1.25

Key Features

  • Temperature Measurements Require No External Components
  • Measures Temperatures from -55°C to +120°C. Fahrenheit Equivalent is -67°F to +248°F
  • Thermometer Accuracy is ±2.0°C
  • Thermometer Resolution is Configurable from 8 to 12 bits (1.0°C to 0.0625°C Resolution)
  • Data is Read From/Written to Via a Motorola Serial Peripheral Interface (SPI) or Standard 3-Wire Serial Interface
  • Wide Analog Power Supply Range (2.65V - 5.5V)
  • Separate Digital Supply Allows for 1.8V Logic
  • Available in an 8-Pin SO (150mil) and 8-Pin µMAX package

Applications/Uses

  • Cell Phone Base Stations
  • Computer Peripherals
  • Networking
  • Telecommunications
  • Test Systems

Description

The DS1722 Digital Thermometer and Thermostat with SPI/3-Wire Interface provides temperature readings which indicate the temperature of the device. No additional components are required; the device is truly a temperature-to-digital converter. Temperature readings are communicated from the DS1722 over a Motorola SPI interface or a standard 3-wire serial interface. The choice of interface standard is selectable by the user.

For applications that require greater temperature resolution, the user can adjust the readout resolution from 8 to 12 bits. This is particularly useful in applications where thermal runaway conditions must be detected quickly. For application flexibility, the DS1722 features a wide analog supply rail of 2.65V - 5.5V. A separate digital supply allows a range of 1.8V to 5.5V.

The DS1722 is available in an 8-pin SO (150mil) and 8-pin µMAX package.

Applications for the DS1722 include personal computers/servers/workstations, cellular telephones, office equipment, or any thermally-sensitive system.

Simplified Block Diagram

DS1722: Functional Block Diagram DS1722: Functional Block Diagram Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .