Maxim DS2422S+

Overview

The DS2422S temperature/datalogger combines the core functions of a fully featured datalogger in a single chip. It includes a temperature sensor, realtime clock (RTC), memory, 1-Wire® interface, and serial interface for an analog-to-digital converter (ADC) as well as control circuitry for a charge pump.

■ Automatically Wakes Up, Measures Temperature and/or Reads an External ADC and Stores Values in 8kB of Datalog Memory in 8 or 16-Bit Format■ On-Chip Direct-to-Digital Temperature Converter with 8-Bit (0.5°C) or 11-Bit (0.0625°C) Resolution■ Sampling Rate from 1s up to 273hrs■ Programmable Recording Start Delay After Elapsed Time or Upon a Temperature Alarm Trip Point■ Programmable High and Low Trip Points for Temperature and Data Alarms■ Quick Access to Alarmed Devices Through 1-Wire Conditional Search Function■ 512 Bytes of General-Purpose Memory Plus 64 Bytes of Calibration Memory■ Two-Level Password Protection of all Memory and Configuration Registers■ Unique Factory-Lasered 64-Bit Registration Number Assures Error-Free Device Selection and Absolute Part Identity■ Built-in Multidrop Controller Ensures Compatibility with Other Dallas Semiconductor 1-Wire Net Products■ Directly Connects to a Single Port Pin of a Microprocessor and Communicates at Up to 15.4kbps at Standard Speed or up to 125kbps in Overdrive Mode■ -40°C to +85°C Operating Range■ 2.8V to 3.6V Single-Supply Battery Operation■ Low Power (1.2µA Standby, 350µA Active)

Features

Applications

• Computers
• Battery Management
• Printers
• Power Supply Modules
• FAX Machines
• Mobile Phones
• Cellular Phones
• Power Supply Thermal Shutdown
• Temperature-Controlled Fans
• Temperature Measurement/Instrumentation