General 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. Communication with the DS7505 is achieved through a simple 2-wire serial interface. Three address pins allow up to eight DS7505 devices to operate on the same 2-wire bus, which greatly simplifies distributed temperature-sensing applications.

特性 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)

? ±0.5°C Accuracy Over a 0°C to +70°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 and Nonvolatile (NV)

? Stand-Alone Thermostat Capability

? Data Read/Write Occurs Through a 2-Wire Serial Interface (SDA and SCL Pins)

? Data Lines Filtered Internally for Noise Immunity (50ns Deglitch)

? Optional 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 SO and μMAX? Packages

Applications

??? Networking Equipment

??? Cellular Base Stations

??? Office Equipment

??? Medical Equipment

??? Any Thermally Sensitive System