Analog Devices ADL5304
The ADL5304 is a high speed logarithmic converter with fast response and low noise over a 200 dB (1 pA to 10 mA) measurement range. The ADL5304 provides a nominal logarithmic slope of 10 mV/dB (200 mV/decade); other values are easily configured. The default intercept value of 3.162 fA places the midpoint of the measurement range of 100 nA at VLOG = 1.5 V.| Part No. | ADL5304 |
|---|---|
| Datasheet | ADL5304 Download |
| Manufacturer |  Analog Devices |
| Description | Logarithmic Converter |
| Buy | Stock & Price |
FEATURES
Optimized for very fast response at all input currents Overall bandwidth of >4 MHz for inputs >1 µA A single positive supply of 5 V is all that is required for operation over a specified 1 pA to 3 mA input range. Dual-supply operation extends the specified input current range to 10 mA. 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 operationAPPLICATIONS
High accuracy optical power measurement Wide range baseband log compression Versatile detector for high speed APC loopsGENERAL DESCRIPTION
Logarithmic intercept can be programmed over a wide range with the internal 100 nA current source or externally for log ratio applications. The ADL5304 accepts two current inputs to the logarithmic argument.
