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Data Sheet

FULL DATA SHEET (PDF, 188kB) Download   E-Mail

Description

The DS75 digital thermometer and thermostat provides 9, 10, 11, or 12-bit digital temperature readings over a -55°C to +125°C range with ±2°C accuracy over a -25°C to +100°C range. At power-up, the DS75 defaults to 9-bit resolution for software compatibility with the LM75. Communication with the DS75 is achieved via a simple 2-wire serial interface. Three address pins allow up to eight DS75 devices to operate on the same 2-wire bus, which greatly simplifies distributed temperature sensing applications. The DS75 thermostat has a dedicated open-drain output (O.S.) and programmable fault tolerance, which allows the user to define the number of consecutive error conditions that must occur before O.S is activated. There are two thermostatic operating modes that control thermostat operation based on user-defined trip-points (TOS and THYST). A block diagram of the DS75 is shown in Figure 1 and detailed pin descriptions are given in Table 2.

Key Features		Applications/Uses
Temperature Measurements Require No External Components Measures Temperatures from -55°C to +125°C (-67°F to +257°F) ±2°C Accuracy Over a -25°C to +100°C Range Thermometer Resolution is User-Configurable from Nine (Default) to 12 Bits (0.5°C to 0.0625°C Resolution) 9-Bit Conversion Time is 150ms (Max) Thermostatic Settings are User-Definable Data is Read/Written Via 2-Wire Serial Interface (SDA and SCL Pins) Multidrop Capability Simplifies Distributed Temperature-Sensing Applications Wide Power-Supply Range (+2.7V to +5.5V). Pin/software Compatible with the LM75 Available in 8-Pin µMAX® and SO Packages. See Table 1 for Ordering Information Applications Include Personal Computers, Cellular Base Stations, Office Equipment, or Any Thermally Sensitive System		Any Thermally Sensitive System Cell Phone Base Stations Office Equipment Personal Computing

Application Notes

Application Note 3268: DS75 2-Wire Communication SDA Hold Time Clarification - DS75 Application Note 3489: Installing the DS9123O USB Adapter on Windows® 98 - DS75 Application Note 3930: Package Thermal Resistance Values (Theta JA, Theta JC) for Dallas Semiconductor Temperature Sensors - DS75

Evaluation Kits

none

Design Guides

TEMP SENSORS (PDF)

Reliability Reports

Reliability Report: DS75.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: 1-9 of 9
DS75	Free Sample	Buy	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS75S			SOIC;8 pin;31 mm² Dwg: 56-G2008-001C (PDF) Use pkgcode/variation: S8-2*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS75S+			SOIC;8 pin;31 mm² Dwg: 56-G2008-001C (PDF) Use pkgcode/variation: S8+2*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS75S+T&R			SOIC;8 pin;31 mm² Dwg: 56-G2008-001C (PDF) Use pkgcode/variation: S8+2*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS75U-C12+T&R			uSOP;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1*	0°C to +70°C	See data sheet Materials Analysis
DS75U/T&R			uSOP;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS75U-C12/T&R			uSOP;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-55°C to +125°C	See data sheet Materials Analysis
DS75U			uSOP;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8-1*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS75U+			uSOP;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS75U+T&R			uSOP;8 pin;16 mm² Dwg: 21-0036J (PDF) Use pkgcode/variation: U8+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis

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