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DS1858
Dual Temperature-Controlled Resistors with Three Monitors

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


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Data Sheet
FULL DATA SHEET (PDF, 428kB)
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Description
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   Applications/Uses
  • 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

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

    Key Specifications:   Fiber Monitoring and Control
    Part Number Features ADCs Resolution (Bits) DACs, Pots, Resistors FS Output Number of Steps Temp. Sensor Memory Supply Voltage (V) Control Interface EV-Kit RoHS Available Package Smallest Available Package (max w/pins) (mm2) Operating Temp. Range (°C) Price**
    DS1858 
    Alarm Flags
    Complies or Compatible to SFF-8472
    External Calibration
    Look-Up Table Compensation
    User EEPROM
    5-Input Muxable 12 2 Resistors 50kohms 256 Internal EEPROM 3.3
    5
    2-Wire Yes Yes CSBGA/16
    TSSOP/16
    16 -40 to +95 $2.38 @ 1k
    See All Fiber Monitoring and Control (10)
    Notes:
    **This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

    Diagram
    DS1858: Typical Operating Circuit
    Typical Operating Circuit

    Application Notes
  • Application Note 166: Interfacing Digitally Controlled Potentiometers and Resistors to Laser Drivers - DS1858
  • Application Note 174: Monitor Calibration in Fiber Optic Applications - DS1858
  • Application Note 210: Implementing Internal Calibration Using the DS1858 - DS1858
  • Application Note 228: How to Interpret DS1854, DS1857, and DS1858 Temperature and Voltage Readings - DS1858
  • Application Note 1766: HFRD-03.0: Multi-Rate (1Gbps - 2.7Gbps) Small Form Factor Pluggable (SFP) Transmitter - DS1858
  • Application Note 1922: DS1858 Analog Monitor Input Online Interactive Calculator Temperature-Controlled Resistors with Three Monitors - DS1858
  • Application Note 1937: HFAN-02.3.3: Optimizing the Resolution of Laser Driver Current Settings Using a Linear Digital Potentiometer - DS1858
  • Application Note 2858: DS1859 Internal Calibration and Right Shifting (Scalable Dynamic Ranging) - DS1858
  • Application Note 3315: Writing Parallel-Port 2-Wire Software in C - DS1858
  • Application Note 3317: Adding Windows NT/2000/XP Support to the AN3315 Parallel-Port 2-Wire Software - DS1858
  • Application Note 3376: HFRD-15.0: High-Frequency SFP Host Board (Includes Integrated RS-232 to I²C Conversion) - DS1858
  • Application Note 3427: Interfacing the DS1859 Digitally Controlled Resistors to the MAX3735 Laser Driver - DS1858
  • Application Note 3481: Using the DS1859 with External EEPROM - DS1858
  • Application Note 3751: How to Program a Device Using the File Tab in the DS185XEVKIT - DS1858

    Evaluation Kits
    none

    Design Guides
  • FIBER (PDF)
  • COMMUNICATIONS (PDF)
  • DIGITAL POTENTIOMETERS (PDF)

    Reliability Reports
  • Reliability Report: DS1858.pdf

    Software/Models
    none

    Ordering Information
    Notes:

    1. Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales.
    2. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day.
    3. Part number suffixes: T or T&R = tape and reel; + = RoHS/lead-free; # = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions.
    4. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.


    Devices: 1-4 of 4

    DS1858 Notes Free
    Sample
    Buy
    Package: TYPE PINS FOOTPRINT
      DRAWING CODE/VAR *
    Temp RoHS/Lead-Free?
    Materials Analysis
    DS1858B-050+  
    CSBGA;16 pin;16 mm²
    Dwg: 56-G6005-001B (PDF)
    Use pkgcode/variation: X16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis
    DS1858B-050  
    CSBGA;16 pin;16 mm²
    Dwg: 56-G6005-001B (PDF)
    Use pkgcode/variation: X16-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1858E-050   50kohms
    TSSOP;16 pin;33 mm²
    Dwg: 56-G2019-000A (PDF)
    Use pkgcode/variation: U16-1*
    -40°C to +85°C RoHS/Lead-Free: No
    Materials Analysis
    DS1858E-050+  
    TSSOP;16 pin;33 mm²
    Dwg: 56-G2019-000A (PDF)
    Use pkgcode/variation: U16+1*
    -40°C to +85°C RoHS/Lead-Free: Lead Free
    Materials Analysis

    More Information
  • New Product Press Release 2003-01-22 
  • Evaluation Kit: DS185XEVKIT

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

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    2006-05-18
    This page last modified: 2007-08-06



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