The AD6630 is an IF gain block designed to interface betweenSAW filters and differential input analog-to-digital converters.The AD6630 has a fixed gain of 24 dB and has been optimizedfor use with the AD6600 and AD6620 in digitizing narrowbandIF carriers in the 70 MHz to 250 MHz range.Taking advantage of the differential nature of SAW filters, theAD6630 has been designed as a differential in/differential outgain block. This architecture allows 100 dB of adjacent channelblocking using low cost SAW filters. The AD6630 providesoutput limiting for ADC and SAW protection with ,10° phasevariation in recovery from overdrive situations.Designed for “narrow-band” cellular/PCS receivers, the highlinearity and low noise performance of the AD6630 allows forimplementation in a wide range of applications ranging from
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