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Data Sheet

FULL DATA SHEET (PDF, 392kB) Download   E-Mail

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.

Key Features		Applications/Uses
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		Cell Phone Base Stations Computer Peripherals Networking Telecommunications Test Systems

Application Notes

Application Note 3489: Installing the DS9123O USB Adapter on Windows® 98 - DS1722 Application Note 3930: Package Thermal Resistance Values (Theta JA, Theta JC) for Dallas Semiconductor Temperature Sensors - DS1722

Evaluation Kits

none

Design Guides

TEMP SENSORS (PDF)

Reliability Reports

Reliability Report: DS1722.pdf

Software/Models

none

Ordering Information
Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
Devices: 1-8 of 8
DS1722	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1722S			SOIC;8 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S8-2*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS1722S/T&R			SOIC;8 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S8-2*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS1722S+T&R			SOIC;8 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S8+2*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1722S+			SOIC;8 pin; Dwg: 21-0041 (PDF) Use pkgcode/variation: S8+2*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1722U			uMAX;8 pin; Dwg: 21-0036 (PDF) Use pkgcode/variation: U8-1*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS1722U+T&R			uMAX;8 pin; Dwg: 21-0036 (PDF) Use pkgcode/variation: U8+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1722U+			uMAX;8 pin; Dwg: 21-0036 (PDF) Use pkgcode/variation: U8+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1722U/T&R			uMAX;8 pin; Dwg: 21-0036 (PDF) Use pkgcode/variation: U8-1*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis

More Information

New Product Press Release 2001-05-03  Temperature Family by Product Type

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