AD8304ARU-REEL7

Overview

The AD8304ARU-REEL7 is a monolithic logarithmic converter from Analog Devices, packaged in a 14-lead TSSOP. It provides an exceptionally large dynamic range of 160 dB (100 pA to 10 mA) for measuring low-frequency signal power in fiber optic systems. The device operates on a single positive supply voltage ranging from 3.0 V to 5.5 V, with an optional negative supply. Key electrical parameters include a quiescent current of 4.5 mA, a default logarithmic slope of 10 mV/dB at the VLOG pin, and an output bandwidth of 10 MHz. It features precise laser trimming for accurate scaling and temperature stability.

Feature Summary

• Optimized for interfacing with fiber optic photodiodes using advanced translinear techniques.
• Provides eight full decades of measurement range with high accuracy and linearity.
• Features a rail-to-rail output buffer capable of driving significant loads.
• Includes chip disable functionality to reduce power consumption in standby modes.

Applications

• High accuracy optical power measurement
• Wide range baseband log compression
• Versatile detector for Automatic Power Control (APC) loops

Procurement Notes

Verify the specific REEL7 suffix indicates a 7-inch tape and reel packaging option when sourcing this component. Confirm that the manufacturer part number matches the requested specifications exactly. Ensure compatibility with the required operating temperature range and package type before finalizing procurement orders.

Selection Notes

Select this component for applications requiring wide dynamic range logarithmic conversion of photocurrents. Consider the 10 mV/dB default slope and 10 MHz output bandwidth for system design. Evaluate the need for external filtering or slope adjustment resistors based on the specific input current range and available supply voltage headroom.

Part Context

This part belongs to the AD8304 series of logarithmic amplifiers designed by Analog Devices. It is specifically engineered for optical power monitoring in fiber optic communication systems. The device integrates a photodiode interface, logarithmic processor, and output buffer into a single compact package.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.