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AD641 - 250 MHz Demodulating Logarithmic Amplifier

General Description

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.

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

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Datasheet Details

Part number AD641
Manufacturer Analog Devices
File Size 371.74 KB
Description 250 MHz Demodulating Logarithmic Amplifier
Datasheet download datasheet AD641 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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a 250 MHz Demodulating Logarithmic Amplifier 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 Resistors Onboard 10؋ Attenuator Dual Polarity Current Outputs Direct Coupled Differential Signal Path APPLICATIONS IF/RF Signal Processing Received Signal Strength Indicator (RSSI) High Speed Signal Compression High Speed Spectrum Analyzer ECM/Radar PRODUCT DESCRIPTION The AD641 is a 250 MHz, demodulating logarithmic amplifier with an accuracy of ± 2.0 dB and 44 dB dynamic range.