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DS1858：Dual Temperature-Controlled Resistors with Three Monitors

Industry's First Integrated Controller-Monitors for SFF/SFP Optical Modules

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.

Key Features 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

DS1858: Typical Operating Circuit Applications/Uses Diagnostic Monitoring Instrumentation and Industrial Controls Optical Transceivers Optical Transponders RF Power Amps

DataSheet

Parametrics

Design kits & evaluation modules

• DS1854EVKIT
• DS1857EVKIT
• DS1858EVKIT
• DS1859EVKIT
• DS185XEVKIT

Quality and Environmental Data

• DS1858.pdf

Related Products

• DS1854：Dual Temperature-Controlled Resistors with Two Monitors
• DS1847：Dual Temperature-Controlled NV Variable Resistor
• DS1848：Dual Temperature-Controlled NV Variable Resistor & Memory
• DS1852：Optical Transceiver Diagnostic Monitor
• DS1855：Dual Nonvolatile Digital Potentiometer and Secure Memory
• DS1845：Dual NV Potentiometer and Memory

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