Dual Temperature-Controlled Resistors with Three Monitors

The DS1858 dual temperature-controlled nonvolatile (NV) variable resistors with three monitors consists of two 50kΩ 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

* Diagnostic Monitoring * Instrumentation and Industrial Controls * Optical Transceivers * Optical Transponders * RF Power Amps

* Five Total Monitored Channels (Temperature, VCC, MON1, MON2, MON3)

* Three External Analog Inputs (MON1, MON2, MON3)

* Internal Direct-to-Digital Temperature Sensor

* Two 50kΩ, 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

* SFF-8472 Compatible