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AD8319 Datasheet

Part NameAD8319(2005) ADI
Analog Devices ADI
Description1 MHz to 10 GHz, 45 dB Log Detector/Controller
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The AD8319 is a demodulating logarithmic amplifier, capable of accurately converting an RF input signal to a corresponding decibel-scaled output. It employs the progressive compression technique over a cascaded amplifier chain, each stage of which is equipped with a detector cell. The device can be used in either measurement or controller modes. The AD8319 maintains accurate log conformance for signals of 1 MHz to 8 GHz and provides useful operation to 10 GHz. The input dynamic range is typically 40 dB (re: 50 Ω) with error less than ±1 dB. The AD8319 has 8/10 ns response time (fall time/rise time) that enables RF burst detection to a pulse rate of beyond 50 MHz. The device provides unprecedented logarithmic intercept stability vs. ambient temperature conditions. A supply of 3.0 V to 5.5 V is required to power the device. Current consumption is typically 22 mA, and it decreases to 200 μA when the device is disabled.

   Wide bandwidth: 1 MHz to 10 GHz
   High accuracy: ±1.0 dB over temperature
   >40 dB dynamic range up to 8 GHz
   Stability over temperature ±0.5 dB
   Low noise measurement/controller output VOUT
   Pulse response time: 8/10 ns (fall/rise)
   Small footprint 2 mm x 3 mm CSP package
   Supply operation: 3.0V to 5.5V @ 22 mA
   Fabricated using high speed SiGe process
   RF transmitter PA setpoint control and level monitoring
   Power monitoring in radiolink transmitters
   RSSI measurement in base stations, WLAN, WiMAX, radar

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