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Fast Sample-and-Hold Circuit

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

Product Details

Key Features

Applications/Uses

Parametric specs for Fiber Photodiode Current Monitors
Photo Diode Appl. APD
IDIODE (min) 10µA
IDIODE (max) 4mA
VBIAS (V) (max) 76
Package/Pins UDFN/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
0.94
Parametric specs for Sample-and-Hold Circuits
Inputs 1
# S/H Amplifiers 1
Output Clamp. Diodes No
Hold Step (mV) (max) 1
VOUT (V) 0 to 1
Package/Pins UDFN/8
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Simplified Block Diagram

Technical Docs

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Parameters

Parametric specs for Fiber Photodiode Current Monitors
Photo Diode Appl. APD
IDIODE (min) 10µA
IDIODE (max) 4mA
VBIAS (V) (max) 76
Package/Pins UDFN/8
Oper. Temp. (°C) -40 to +85
Budgetary
Price (See Notes)
0.94
Parametric specs for Sample-and-Hold Circuits
Inputs 1
# S/H Amplifiers 1
Output Clamp. Diodes No
Hold Step (mV) (max) 1
VOUT (V) 0 to 1
Package/Pins UDFN/8

Key Features

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

Applications/Uses

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

Description

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.

Simplified Block Diagram

DS1843: Typical Operating Circuit DS1843: Typical Operating Circuit Zoom icon

Technical Docs

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .