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High-Precision Digital Thermometer and Thermostat

Improved LM75/DS75 Software-Compatible Temperature Sensor Is ±0.5°C Accurate and Has Nonvolatile Thermostat Thresholds

Product Details

Key Features

Applications/Uses

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 2-Wire/I2C/SMBus
Functions Standalone Thermostat
Accuracy (±°C) 0.5
Parasite Pwr. No
Temp. Thresh. Programmable (NV)
Temp. Resolution (bits) 9
10
11
12
Oper. Temp. (°C) -55 to +125
Package/Pins SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
1.46
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Simplified Block Diagram

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Parameters

Parametric specs for Temperature Sensors
Sensor Type Local
# Channels One
Interface 2-Wire/I2C/SMBus
Functions Standalone Thermostat
Accuracy (±°C) 0.5
Parasite Pwr. No
Temp. Thresh. Programmable (NV)
Temp. Resolution (bits) 9
10
11
12
Oper. Temp. (°C) -55 to +125
Package/Pins SOIC (N)/8
UMAX/8
Budgetary
Price (See Notes)
1.46

Key Features

  • Extends Performance Range with a Low-Voltage, 1.7V to 3.7V Operating Range
  • Maximizes System Accuracy in Broad Range of Thermal Management Applications
    • Measures Temperature from -55°C to +125°C (-67°F to +257°F)
    • ±0.5°C Accuracy Over a 0°C to +70°C Range
    • User-Configurable Resolution from 9 Bits (Default) to 12 Bits (0.5°C to 0.0625°C Resolution)
  • Reduces Cost with No External Components and Stand Alone Thermostat Capability
  • Increases Reliability and System Robustness
    • Internally Filtered Data Lines for Noise Immunity (50ns Deglitch)
    • Bus Timeout Feature Prevents Lockup on a 2-Wire Interface
  • Simplifies Distributed Temperature-Sensing Applications with Multidrop Capability
    • Up to Eight Devices Can Operate on a 2-Wire Bus
  • Fast 25ms (max) 9-Bit Conversion Time
  • Flexible and Nonvolatile (NV) User-Defined Thermostatic Modes

Applications/Uses

  • Any Thermally Sensitive System
  • Cellular Base Stations
  • Medical Equipment
  • Networking Equipment
  • Office Equipment

Description

The DS7505 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 ±0.5°C accuracy over a -0°C to +70°C range. A 9-bit resolution mode is software compatible with the LM75.

The DS7505 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) that are stored in EEPROM registers.

Simplified Block Diagram

DS7505: Block Diagram DS7505: Block Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .