Fast Sample-and-Hold Circuit

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

Please check latest availability status for a specific part variant.


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
Part NumberPhoto Diode Appl.IDIODEIDIODEVBIAS
Package/PinsOper. Temp.
minmaxmaxSee Notes
DS1843 APD10µA4mA76
-40 to +85$0.89 @1k
See All Fiber Photodiode Current Monitors (9)

Part NumberInputsS/H Amps.Output Clamp. DiodesHold Step
DS1843 11No10 to 1
See Data Sheet
See All Sample-and-Hold Circuits (2)
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

Quality and Environmental Data

Product Reliability Reports: DS1843.pdf 
Lead-Free Package Tin (Sn) Whisker Reports

Tools & Models

  • DS1843 IBIS Model
  • CAD Symbols and Footprints

  • DS1843D+
  • DS1843D+TRL
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    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 PDF Title
    User Guide 6224 DS1843 Evaluation Kit User Guide
    Type ID Title
    Evaluation Board6690DS1843K Evaluation Kit for the DS1843

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