DS75LX

Digital Thermometer and Thermostat with Extended Addressing

±2.0°C Accurate Temperature Sensor with 27 Unique I²C Address Simplifies Distributed Temperature-Sensing Designs


Please check latest availability status for a specific part variant.

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 DS75LX defaults to 9-bit resolution for software compatibility with the LM75. Communication with the DS75LX is achieved through a simple 2-wire serial interface. Three tri-state address pins allow up to 27 DS75LX devices to operate on the same 2-wire bus, which greatly simplifies distributed temperature-sensing applications.

The DS75LX thermostat has a dedicated open-drain output (O.S.) and programmable fault tolerance, which allow 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).

DS75LX: Block Diagram DS75LX: Block Diagram Enlarge+

Key Features

  • 1.7V to 3.7V Operating Range
  • Tri-State Address Pins Allow Up to 27 Unique Bus Addresses
  • Temperature Measurements Require No External Components
  • Measures Temperatures from -55°C to +125°C (-67°F to +257°F)
  • ±2°C Accuracy from -25°C to +100°C
  • 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 is Read/Written Through 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
  • Servers
  • Telecom Switches and Routers
Part NumberSensor TypeInterfaceChannelsAccuracy
(±°C)
Parasite Pwr.Temp. Thresh.Temp. Resolution
(bits)
Multi DroppableOper. Temp.
(°C)
Package/PinsBudgetary
Price
See Notes
DS75LX Local2-Wire/I2C/SMBusOne2NoProgrammable
9
10
11
12
Yes-55 to +125
SOIC (N)/8
UMAX/8
$1.00 @1k
See All Temperature Sensors (111)
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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

Technical Documents

App Note 5727 Understanding Multidrop Address Assignments for Thermal Sensors
Tutorial 4679 Thermal Management Handbook

Quality and Environmental Data

Product Reliability Reports: DS75LX.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

CAD Symbols and Footprints

  • DS75LXS+
  • DS75LXS+T&R
  • DS75LXU+
  • DS75LXU+T&R
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
    Temperature:

    Related Resources


    MAX30132
    1-, 2-, 4-Channel, Ultra-Low Power Electrochemical Sensor AFEs

    • Multichannel Operation
    • High Accuracy and Precision
    • Autonomous Modes with 256 Word Configurable FIFO and Programmable Alarm

    MAX30134
    1-, 2-, 4-Channel, Ultra-Low Power Electrochemical Sensor AFEs

    • Multichannel Operation
    • High Accuracy and Precision
    • Autonomous Modes with 256 Word Configurable FIFO and Programmable Alarm

    MAX30131
    1-, 2-, 4-Channel, Ultra-Low Power Electrochemical Sensor AFEs

    • Multichannel Operation
    • High Accuracy and Precision
    • Autonomous Modes with 256 Word Configurable FIFO and Programmable Alarm

    MAXM86161
    Single-Supply Integrated Optical Module for HR and SpO2 Measurement

    • Complete Single-Channel Optical Data Acquisition System
    • Built-In Algorithm Further Enhances Rejection of Fast Ambient Transients
    • Optimized Architecture for Reflective Heart Rate and SpO2 Monitoring

    MAX30208
    ±0.1°C Accurate, I2C Digital Temperature Sensor

    • High Accuracy and Precision
    • Low Power Consumption
    • Small Size


    Belle Isle 2020
    05/29/2020 - 05/31/2020, Detroit, MI
    2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.

    RSVP