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Evaluation Board, 160dB Logarithmic Amplifier, Photo-Diode Interface

AD8304-EVALZ - Evaluation Board, 160dB Logarithmic Amplifier, Photo-Diode Interface

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AD8304 Series
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AD8304-EVALZ   Datasheet
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Product Overview

The AD8304-EVALZ is an evaluation board for AD8304 160dB logarithmic amplifier with photo diode interface. The AD8304 is a monolithic logarithmic detector optimised for the measurement of low frequency signal power in fiber optic systems. It uses an advanced translinear technique to provide an exceptionally large dynamic range in a versatile and easily used form. Its wide measurement range and accuracy are achieved using proprietary design techniques and precise laser trimming. In most applications only a single positive supply, VP of 5V will be required, but 3V to 5.5V can be used, and certain applications benefit from the added use of a negative supply, VN. When using low supply voltages, the log slope is readily altered to fit the available span. The low quiescent current and chip disable features facilitate use in battery operated applications.
  • Optimised for fiber optic photodiode interfacing
  • Complete and temperature stable
  • Eight full decades of range
  • 1, 2, or 3-pole low-pass filtering at output
  • Output bandwidth of 10MHz, 15V/s slew rate
  • Low power of 4.5mA quiescent current (enabled)
  • Basic logarithmic intercept at 100pA
  • Easy adjustment of slope and intercept
  • Accurate laser trimmed scaling of logarithmic slope of 10mV/dB


Communications & Networking, Power Management

Product Information

Analog Devices


Logarithmic Detector / Controller



AD8304 Series

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