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

APPLICATIONS

Cellular/PCS Base Stations

IF Sampling Receivers

Fixed Wireless Access

Wireline Modems

Instrumentation