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Status
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.

Data Sheet

FULL DATA SHEET (PDF, 180kB) Download   E-Mail

Description

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. THIGH is driven high if the DS1720's temperature is greater than or equal to a user-defined temperature TH. TLOW is driven high if the DS1720'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 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.

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 non-volatile 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 8-pin SOIC (208 mil) package		Consumer Products Industrial Systems Thermally Sensitive Systems Thermometers Thermostatic Controls

Application Notes

Application Note 3489: Installing the DS9123O USB Adapter on Windows® 98 - DS1720 Application Note 3930: Package Thermal Resistance Values (Theta JA, Theta JC) for Dallas Semiconductor Temperature Sensors - DS1720

Design Guides

Thermal Management (PDF)

Reliability Reports

Reliability Report: DS1720.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: 1-6 of 6

DS1720	Free Sample	Buy	Status	Recommended Replacement	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS1720S+T&R-W		N/A	NRND	DS1726	Land Pattern: Not Available	-55°C to +125°C	See data sheet
DS1720S+W		N/A	NRND	DS1726	Land Pattern: Not Available	-55°C to +125°C	See data sheet
DS1720S			NRND	DS1726	SOIC (W);8 pin;44.1 mm² Land Pattern: Not Available Use pkgcode/variation: W8-3*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS1720S+			NRND	DS1726	SOIC (W);8 pin;44.1 mm² Land Pattern: Not Available Use pkgcode/variation: W8+3*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS1720S/T&R			NRND	DS1726	SOIC (W);8 pin;44.1 mm² Land Pattern: Not Available Use pkgcode/variation: W8-3*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS1720S+T&R			NRND	DS1726	SOIC (W);8 pin;44.1 mm² Land Pattern: Not Available Use pkgcode/variation: W8+3*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis

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Temperature Family by Product Type

Related Products

DS1626, DS1726 High-Precision 3-Wire Digital Thermometer and Thermostat

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