95 dB Logarithmic Amplifier
01084-001
Fast, Voltage-Out, DC to 440 MHz, 95 dB Logarithmic Amplifier
AD8310
FEATURES
Multistage demodulating logari...
Description
01084-001
Fast, Voltage-Out, DC to 440 MHz, 95 dB Logarithmic Amplifier
AD8310
FEATURES
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
APPLICATIONS
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
FUNCTIONAL BLOCK DIAGRAM
SUPPLY +INPUT –INPUT
COMMON
VPOS 5 8mA
BAND GAP REFERENCE AND BIASING
AD8310
ENBL 7 ENABLE
INHI 8
1.0kΩ 1 INLO
3
SIX 14.3dB 900MHz AMPLIFIER STAGES
MIRROR 2μA /dB
NINE D...
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