PRODUCT DESCRIPTION
The AD8369 is a high performance digitally controlled variable gain amplifier (VGA) for use from low frequencies to a –3 dB frequency of 600 MHz at all gain codes. The AD8369 delivers excellent distortion performance: the two-tone, third-order intermodulation distortion is –69 dBc at 70 MHz for a 1 V p-p composite output into a 1 kW load. The AD8369 has a nominal noise figure of 7 dB when at maximum gain, then increases with decreasing gain. Output IP3 is +19.5 dBm at 70 MHz into a 1 kW load and remains fairly constant over the gain range.

FEATURES
   Digitally Controlled Variable Gain in 3 dB Steps
      –5 dB to +40 dB (RL = 1 kΩ)
      –10 dB to +35 dB (RL = 200 Ω)
   Less than 0.2 dB Flatness over a ±20 MHz Bandwidth
      up to 380 MHz
   4-Bit Parallel or 3-Wire Serial Interface
   Differential 200 Ω Input and Output Impedance
   Single 3.0 V–5.5 V Supply
      Draws 37 mA at 5 V
   Power-Down <1 mA Maximum

APPLICATIONS
   Cellular/PCS Base Stations
   IF Sampling Receivers
   Fixed Wireless Access
   Wireline Modems
   Instrumentation