AD641 Datasheet 250 Mhz Demodulating Logarithmic Amplifier

Manufacturer: Analog Devices

Overview: a 250 MHz Demodulating Logarithmic Amplifier AD641.

Datasheet Details

Part number	AD641
Manufacturer	Analog Devices
File Size	371.74 KB
Description	250 MHz Demodulating Logarithmic Amplifier
Datasheet	AD641_AnalogDevices.pdf

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 using one of several on-chip resistors to select the slope.

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 Resistors Onboard 10؋ Attenuator Dual Polarity Current Outputs Direct Coupled Differential Signal Path.

Part Number	Description
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AD640	DC-Coupled Demodulating 120 MHz Logarithmic Amplifier
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AD6439	Discrete Multitone (DMT) Coprocessor
AD644	Dual High Speed/ Implanted BiFET Op Amp
AD6440	Analog Front-End
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