GENERAL DESCRIPTION
The ADL5519 is a dual-demodulating logarithmic amplifier that incorporates two AD8317s. It can accurately convert an RF input signal into a corresponding decibel-scaled output. The ADL5519 provides accurately scaled, independent, logarithmic output voltages for both RF measurement channels. The device has two additional output ports, OUTP and OUTN, that provide the measured differences between the OUTA and OUTB channels. The on-chip channel matching makes the log amp outputs insensitive to temperature and process variations.

FEATURES
   Wide bandwidth: 1 MHz to 10 GHz
   Dual-channel and channel difference output ports
   Integrated accurate scaled temperature sensor
   62 dB dynamic range (±3 dB)
   >50 dB with ±1 dB up to 8 GHz
   Stability over temperature: ±0.5 dB (−40°C to +85°C)
   Low noise detector/controller outputs
   Pulse response time: 6 ns/8 ns (fall time/rise time)
   Supply operation: 3.3 V to 5.5 V @ 60 mA
   Fabricated using high speed SiGe process
   Small footprint, 5 mm × 5 mm, 32-lead LFCSP
   Operating temperature range: −40°C to +125°C

APPLICATIONS
   RF transmitter power amplifier linearization and
      gain/power control
   Power monitoring in radio link transmitters
   Dual-channel wireless infrastructure radios
   Antenna VSWR monitor
   RSSI measurement in base stations, WLAN, WiMAX, radar