AD8310ARMZ-REEL7 Datasheet

Fast, Voltage-Out, DC to 440 MHz, 95 dB Logarithmic Amplifier


The AD8310 is a complete, dc to 440 MHz demodulating logarithmic amplifier (log amp) with a very fast voltage mode output, capable of driving up to 25 mA into a grounded load in under 15 ns. It uses the progressive compression (successive detection) technique to provide a dynamic range of up to 95 dB to ±3 dB law conformance or 90 dB to a ±1 dB error bound up to 100 MHz. It is extremely stable and easy to use, requiring no significant external components. A single-supply voltage of 2.7 V to 5.5 V at 8 mA is needed, corresponding to a power consumption of only 24 mW at 3 V. A fast-acting CMOS compatible enable pin is provided.

   Multistage demodulating logarithmic amplifier
   Voltage output, rise time <15 ns
   High current capacity: 25 mA into grounded RL
   95 dB dynamic range: −91 dBV to +4 dBV
   Single supply of 2.7 V min at 8 mA typ
   DC to 440 MHz operation, ±0.4 dB linearity
   Slope of +24 mV/dB, intercept of −108 dBV
   Highly stable scaling over temperature
   Fully differential dc-coupled signal path
   100 ns power-up time, 1 mA sleep current

   Conversion of signal level to decibel form
   Transmitter antenna power measurement
   Receiver signal strength indication (RSSI)
   Low cost radar and sonar signal processing
   Network and spectrum analyzers
   Signal-level determination down to 20 Hz
   True-decibel ac mode for multimeters



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