AD640JN Datasheet PDF - ADI

●PRODUCT DESCRIPTION

●The AD640 is a complete monolithic logarithmic amplifier. A single AD640 provides up to 50 dB of dynamic range for frequencies from dc to 120 MHz. Two AD640s in cascade can provide up to 95 dB of dynamic range at reduced bandwidth. The AD640 uses a successive detection scheme to provide an output current proportional to the logarithm of the input voltage. It is laser calibrated to close tolerances and maintains high accuracy over the full military temperature range using supply voltages from ±4.5 V to ±7.5 V.

●FEATURES

●  Complete, Fully Calibrated Monolithic System

●  Five Stages, Each Having 10 dB Gain, 350 MHz BW

●  Direct Coupled Fully Differential Signal Path

●  Logarithmic Slope, Intercept and AC Response are Stable Over Full Military Temperature Range

●  Dual Polarity Current Outputs Scaled 1 mA/Decade

●  Voltage Slope Options (1 V/Decade, 100 mV/dB, etc.)

●  Low Power Operation (Typically 220 mW at 65 V)

●  Low Cost Plastic Packages Also Available

●APPLICATIONS

●  Radar, Sonar, Ultrasonic and Audio Systems

●  Precision Instrumentation from DC to 120 MHz

●  Power Measurement with Absolute Calibration

●  Wide Range High Accuracy Signal Compression

●  Alternative to Discrete and Hybrid IF Strips

●  Replaces Several Discrete Log Amp ICs