GENERAL DESCRIPTION
The AD6654 is a mixed-signal IF-to-baseband receiver consisting of a 14-bit, 92.16 MSPS analog-to-digital converter (ADC) and a 4-/6-channel, multimode digital down-converter (DDC) capable of processing up to six WCDMA (wideband code division multiple access) channels. The AD6654 has been optimized for the demanding filtering requirements of wideband standards such as CDMA2000, UMTS, and TD-SCDMA, but is flexible enough to support wider standards such as WiMAX. It is typically used as part of a radio system that digitally demodulates and filters IF sampled signals.

FEATURES
   SNR = 90 dB in 1.25 MHz bandwidth to Nyquist
   SNR = 87 dB in 1.25 MHz bandwidth to 200 MHz
   Integrated 14-bit, 92.16 MSPS ADC
   IF sampling frequencies to 200 MHz
   Internal 2.4 V reference, 2.2 V p-p analog input range
   Internal differential track-and-hold analog input
   Processes 4/6 wideband carriers simultaneously
   Fractional clock multiplier to 200 MHz
   Programmable decimating FIR filters, interpolating
      half-band filters and programmable AGC loops
      with 96 dB range
   Three 16-bit configurable parallel output ports
   User-configurable built-in self-test (BIST) capability
   8-/16-bit microport and SPORT/SPI® serial port control

APPLICATIONS
   Multicarrier, multimode digital receivers
   GSM, EDGE, PHS, UMTS, WCDMA, CDMA2000,
      TD-SCDMA, WiMAX
   Micro and pico cell systems, software radios
   Wireless local loop
   Smart antenna systems
   In-building wireless telephony
   Broadband data applications
   Instrumentation and test equipment