Fast Sample-and-Hold Circuit

RSSI Burst-Mode Sample-and-Hold Circuit in 2mm x 2mm µDFN Package

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The DS1843 is a sample-and-hold circuit useful for capturing fast signals where board space is constrained. It includes a differential, high-speed switched capacitor input sample stage, offset nulling circuitry, and an output buffer. The DS1843 is optimized for use in optical line transmission (OLT) systems for burst-mode RSSI measurement in conjunction with an external sense resistor.
DS1843: Typical Operating Circuit DS1843: Typical Operating Circuit Enlarge+

Key Features

  • Fast Sample Time < 300ns
  • Hold Time > 100µs
  • Low Input Offset
  • Buffered Output
  • Small, 8-Pin µDFN (2mm x 2mm) Pb-Free Package


  • Gigabit Ethernet Passive Optical Network (GEPON) OLT
  • Gigabit Passive Optical Network (GPON) OLT
  • GPON Optical Network Unit
  • Sample and Hold

Pricing 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 and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

DS1843K: Evaluation Kit for the DS1843

Technical Documents

User Guide 6224 DS1843 Evaluation Kit User Guide

Tools & Models

  • DS1843 IBIS Model
  • Product Reliability Reports: DS1843.pdf 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >


    Related Resources

    Type ID Title
    User Guide 6224 DS1843 Evaluation Kit User Guide