AD8305

FEATURES Optimized for fiber optic photodiode interfacing Measures current over 5 decades Law conformance 0.1 dB from 10 nA to 1 mA Single- or dual-supply operation (3 V to 12 V total) Full log-ratio capabilities Nominal slope of 10 mV/dB (200 mV/decade) Nominal intercept of 1 nA (set by external resistor) Optional adjustment of slope and intercept Complete and temperature stable Rapid response time for a given current level Miniature 16-lead chip scale package (LFCSP 3 mm × 3 mm) Low power: ~5 mA quiescent current APPLICATIONS Optical power measurement Wide range baseband logarithmic compression Measurement of current and voltage ratios Optical absorbance measurement GENERAL DESCRIPTION The AD83051 is an inexpensive microminiature logarithmic converter optimized for determining optical power in fiber optic systems. It uses an advanced implementation of a classic translinear (junction based) technique to provide a large dynamic range in a versatile and easily used form. A single-suppl...