AD641 - 250 MHz Demodulating Logarithmic Amplifier
The AD641 is a 250 MHz, demodulating logarithmic amplifier with an accuracy of ± 2.0 dB and 44 dB dynamic range.
The AD641 uses a successive detection architecture to provide an output current that is logarithmically proportional to its input voltage.
The output current can be converted to a voltage
AD641 Features
* Logarithmic Amplifier Performance Usable to 250 MHz 44 dB Dynamic Range ؎2.0 dB Log Conformance 37.5 mV/dB Voltage Output Stable Slope and Intercepts 2.0 nV/√Hz Input Noise Voltage 50 V Input Offset Voltage Low Power ؎5 V Supply Operation 9 mA (+VS), 35 mA (
* VS) Quiescent Current Onboard Re
