DS1859

Rev 1; 11/03 www.DataSheet4U.com Dual, Temperature-Controlled Resistors with Internally Calibrated Monitors General Description Features ♦ SFF-8472 Compatible ♦ Five Monitored Channels (Temperature, VCC, MON1, MON2, MON3) ♦ Three External Analog Inputs (MON1, MON2, MON3) That Support Internal and External Calibration ♦ Scalable Dynamic Range for External Analog Inputs ♦ Internal Direct-to-Digital Temperature Sensor ♦ Alarm and Warning Flags for All Monitored Channels ♦ Two 50kΩ or Two 20kΩ, Linear, 256-Position, Nonvolatile Temperature-Controlled Variable Resistors ♦ Resistor Settings Changeable Every 2°C ♦ Access to Monitoring and ID Information Configurable with Separate Device Addresses ♦ 2-Wire Serial Interface ♦ Two Buffers with TTL/CMOS-Compatible Inputs and Open-Drain Outputs ♦ Operates from a 3.3V or 5V Supply ♦ Operating Temperature Range of -40°C to +95°C DS1859 The DS1859 dual, temperature-controlled, nonvolatile (NV) variable resistors with three monitors consists of two 50kΩ or two 20kΩ, 256-position, linear, variable resistors; three analog monitor inputs (MON1, MON2, MON3); and a direct-to-digital temperature sensor. The device provides an ideal method for setting and temperature-compensating bias voltages and currents in control applications using minimal circuitry. The variable resistor settings are stored in EEPROM memory and can be accessed over the 2-wire serial bus. Applications Optical Transceivers Optical Transponders Instrumentation and Industrial...