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DS75LV

Low-Voltage Digital Temperature Sensor

±2.0°C Accurate Digital Temperature Sensor Operates From a Supply of Only 1.7V to 3.7V

Overview

Technical Documents

Ordering Info

Status

Active: In Production.

Description

This low-voltage (1.7V to 3.7V) 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 DS75LV defaults to 9-bit resolution for software compatibility with the LM75. Communication with the DS75LV is achieved through a simple 2-wire serial interface. Three address pins allow up to eight DS75LV devices to operate on the same 2-wire bus, which greatly simplifies distributed temperature-sensing applications.

The DS75LV 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 (T_OS and T_HYST).

A block diagram of the DS75LV is shown in Figure 1 and detailed pin descriptions are given in Table 1 of the full data sheet.

Data Sheet

Download	Rev 2	(PDF, 280kB)
E-Mail

Key Features

Operating Range from 1.7V to 3.7V
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 9 (Default) to 12 Bits (0.5°C to 0.0625°C Resolution)
9-Bit Conversion Time is 25ms (Max)
Thermostatic Settings are User-Definable
Data Read/Write Occurs Through a 2-Wire Serial Interface (SDA and SCL Pins)
Data Lines Filtered Internally for Noise Immunity (50ns Deglitch)
Bus Timeout Feature Prevents Lockup Problems on 2-Wire Interface
Multidrop Capability Simplifies Distributed Temperature-Sensing Applications
Pin/Software Compatible with the LM75
Available in 8-Pin µSOP (µMAX®) and SO Packages

Applications/Uses

Any Thermally Sensitive System
Cellular Base Stations
Office Equipment
Personal Computers

Key Specifications:

Temperature Sensors

Part Number

Sensor Type

Interface

Accuracy
(±°C)

Parasite Pwr.

Temp. Thresh.

Temp. Resolution
(bits)

Multi Droppable

Oper. Temp.
(°C)

Smallest Available Pckg.
(mm²)

Budgetary Price

max w/pins

See Notes

DS75LV

Local

2-Wire/I²C/SMBus

Programmable

Yes

-55 to +125

16.2

$0.90 @1k

See All Temperature Sensors (103)

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Diagram

Functional Block Diagram

Application Notes

Application Note 3930		Package Thermal Resistance Values (Theta JA, Theta JC) for Dallas Semiconductor Temperature Sensors
Tutorial 4679		Thermal Management Handbook
Tutorial 4685		How Continuous Positive Airway Pressure (CPAP) Respiratory Ventilation Systems Function

Product Guides

Thermal Management (PDF)

Reliability Reports

Reliability Report:

DS75LV.pdf

Software/Models

none

Ordering Information

Filters:

Part Number:

Package:

Temperature:

Tape and Reel

Sample

Part Number	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
DS75LVS			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-2*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS75LVS+			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+2*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS75LVS+T&R			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8+2*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS75LVS/T&R			Active	SOIC(N);8 pin;30.9 mm² Outline Drawing:21-0041 (PDF) Land Pattern: 90-0096 (PDF) Use pkgcode/variation: S8-2*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS75LVU			Active	µMAX;8 pin;16.2 mm² Outline Drawing:21-0036 (PDF) Land Pattern: 90-0092 (PDF) Use pkgcode/variation: U8-1*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis
DS75LVU+			Active	µMAX;8 pin;16.2 mm² Outline Drawing:21-0036 (PDF) Land Pattern: 90-0092 (PDF) Use pkgcode/variation: U8+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS75LVU+T&R			Active	µMAX;8 pin;16.2 mm² Outline Drawing:21-0036 (PDF) Land Pattern: 90-0092 (PDF) Use pkgcode/variation: U8+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
DS75LVU/T&R			Active	µMAX;8 pin;16.2 mm² Outline Drawing:21-0036 (PDF) Land Pattern: 90-0092 (PDF) Use pkgcode/variation: U8-1*	-55°C to +125°C	RoHS/Lead-Free: No Materials Analysis

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; -D = drypack; -U/+U on DS parts = cut tape. More: See Full Data Sheet or Maxim Product 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.

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More Information

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[ 2006-05-19 ]

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Information Index

Overview		Technical Documents		Ordering Info		Related Products
Description Key Features Applications/Uses Key Specifications Diagram Notes and Comments		Data Sheet Application Notes Evaluation Kits Product Guides Reliability Reports Software/Models		Price and Availability Samples Buy Online Package Information Lead-Free Information		Similar Products by Function Similar Products by Application Evaluation Kits Products with Similar Part Numbers Products Used With This

Rev 2; 2006-11-20
This page last modified: 2009-07-31