DESCRIPTION

· The TPA8304 is a logarithmic detector designed for low-frequency signal power measurement in fiber optic systems, offering a large dynamic range.

· It features wide measurement range, high accuracy, and fast step response, making it ideal for optical system requirements.

· Operates on a single positive supply of 5V, with low quiescent current and chip disable function, suitable for battery-operated applications.

FEATURES

· 7 full decades of range: 1nA to 10mA.

· Law conformance error: 0.2 dB from 10nA to 10mA.

· Fast step response: 0.2 μs rising, 5 μs falling for 10nA to 10μA input.

· Basic logarithmic intercept at 100 pA.

· Logarithmic slope of 200 mV/20dB at the VLOG pin.

· Optimized for fiber optic photodiode interfacing.

· Single-supply operation: 4.5V to 5.5V.

· Power down mode available.

APPLICATIONS

· High accuracy optical power measurement.

· Wide range baseband log compression.

· Versatile detector for APC loops.

· EDFA (Erbium-Doped Fiber Amplifier) applications.