DS75

Digital Thermometer and Thermostat


Please check latest availability status for a specific part variant.

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.
DS75: Functional Block Diagram DS75: Functional Block Diagram Enlarge+

Key Features

  • 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

Applications/Uses

  • Any Thermally Sensitive System
  • Cell Phone Base Stations
  • Office Equipment
  • Personal Computing

See parametric specs for Temperature Sensors (113)


Part NumberSensor TypeInterfaceChannelsAccuracy
(±°C)
Parasite Pwr.Temp. Thresh.Temp. Resolution
(bits)
Multi DroppableOper. Temp.
(°C)
Package/PinsBudgetary
Price
See Notes
DS75 Local2-Wire/I2C/SMBusOne2NoProgrammable
9
10
11
12
Yes-55 to +125
FCHIP/8
SOIC (N)/8
UMAX/8
$0.90 @1k

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.

Tools & Models

  • DS75 IBIS Model
  • Product Reliability Reports: DS75.pdf 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    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


    MAXM86146
    Complete Optical Biosensing Module with Ultra-Low-Power Biometric Sensor Hub

    • Complete Biometric Sensor Hub
    • World-Class Algorithm for Wearable Applications

    MAX31889
    ±0.25°C Accurate I2C Temperature Sensor

    • High Accuracy
    • Long Battery Life
    • Small Size

    MAX31825
    1-Wire® Temperature Sensor with ±1ºC Accuracy

    • 1-Wire Interface Requires Only One Port Pin for Communication
    • Unique 64-bit Serial Code Stored in an On-Board ROM
    • External Resistor Selects Address for Location Identification

    MAX86916
    Integrated Optical Sensor Module for Mobile Health

    • Miniature 3.5mm x 7.0mm x 1.5mm, 14-Pin Optical Module
    • Optical-Grade Glass for Long-Term Optimal and Robust Performance
    • Ultra-Low-Power Operation for Mobile Device

    MAX25205
    Gesture Sensor for Automotive Applications

    • Low-Cost, Flexible Gesture-Sensing Solution for Automotive Applications
    • Low-Power, Low-Cost External CPU Processes Sensor Output
    • Supports Swipe, Rotation, and Proximity Gestures

    MAX86170B
    Best-in-Class Optical Pulse Oximeter and Heart-Rate Sensor AFE for Wearable Health

    • Complete Single-Channel Optical Data Acquisition System
    • Ultra Low-Power Operation for Wearable Devices
    • Excellent Top-End Dynamic Range > 91dB in White Card Loop-Back Test (Nyquist Sample-to-Sample Variance)