GENERAL DESCRIPTION
●The ADL5304is a high speed logarithmic converter with fast response and low noise over a 200 dB (1 pA to 10 mA) measure ment range. The ADL5304provides a nominal logarithmic slope of 10 mV/dB (200 mV/decade); other values are easily configured. Logarithmic intercept can be programmed over a wide range with the internal 100 nA current source or externally for log ratio applications.
●FEATURES
●Optimized for very fast response at all input currents
● Overall bandwidth of >4 MHz for inputs >1 μA
● Bandwidth: 25 kHz at input of 1 nA and 350 kHz at 10 nA
●10 decades of input range: 1 pA to 10 mA
●Law conformance: ±0.25 dB from 100 pA to 100 μA
●Log ratio or fixed-intercept operation
●Precision voltage references and reference current
●Adaptive photodiode (PD) bias for low dark current
●Programmable log slope and intercept
●Default log slope of 10 mV/dB at VLOG pin
●Single- or dual-supply operation
●APPLICATIONS
●High accuracy optical power measurement
●Wide range baseband log compression
●Versatile detector for high speed APC loops
