GENERAL DESCRIPTION
The ADL53101 low cost, dual logarithmic amplifier converts input current over a wide dynamic range to a linear-in-dB output voltage. It is optimized to determine the optical power in wide ranging optical communication system applications, including control circuitry for lasers, optical switches, atten-uators, and amplifiers, as well as system monitoring.

FEATURES
    2 independent channels optimized for photodiode interfacing
    6-decade input dynamic range
    Law conformance 0.3 dB from 3 nA to 3 mA
    Temperature-stable logarithmic outputs
    Nominal slope 10 mV/dB (200 mV/dec), externally scalable
    Intercepts may be independently set by external resistors
    User-configurable output buffer amplifiers
    Single-supply or dual-supply operation
    Space efficient, 24-lead 4 mm × 4 mm LFCSP
    Low power: <10 mA quiescent current

APPLICATIONS
    Gain and absorbance measurements
    Multichannel power monitoring
    General-purpose baseband log compression