Product category:
Communications ICs (Wired)
News Release from: Analog Devices | Subject: AD6634
Edited by the Electronicstalk Editorial
Team on 24 June 2002
Chip aids multichannel W-CDMA processing
The AD6634 is a new member of the VersaCOMM family of receive and transmit signal processors, which serve as the interface between the DSP and high-speed convertor in a multicarrier transceiver.
The AD6634 is a new member of ADI's VersaCOMM family of RSPs and TSPs (receive and transmit signal processors), which serve as the interface between the DSP and high-speed convertor in a multicarrier transceiver In cellular basestations, it creates baseband data for a DSP from high-bandwidth data provided by an A/D convertor, and is compatible with SoftCell high-performance IF sampling A/D convertors such as the AD664x, AD9042, AD943x and the AD922x
This article was originally published on Electronicstalk on 14 Sep 2001 at 8.00am (UK)
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The AD6634 is also compatible with the AD6600 diversity ADC, the combination of which provides a cost and size reduction path.
The SoftCell receiver solution comprises a digital receiver capable of digitising an entire spectrum of carriers and digitally selecting the carrier of interest for tuning and channel selection.
It eliminates redundant radios in wireless basestations.
The AD6634 is a highly integrated multimode four-channel digital receive signal processor capable of processing up to two W-CDMA channels or four GSM/Edge or IS-136 channels.
Each of the AD6634's channels consists of four cascaded signal-processing elements: a frequency translator, two fixed-coefficient decimating filters, and a programmable-coefficient decimating filter.
Two wideband crossbar-switched parallel input ports offer enhanced input signal reconfigurability for multicarrier, diversity, and phased-sector antenna arrays.
Dual 16bit parallel output ports provide a means of recombining serial outputs for high-datarate W-CDMA applications.
Link ports are provided to enable glueless interfaces to ADI's TigerSHARC DSP core.
The AD6634 has on-chip interpolating half-band filters to further increase the output data rate from twice to four times the chip rate.
In addition, embedded digital AGC (automatic gain control) circuitry permits data scaling and power data to be fed directly to a "rake" receiver in CDMA based applications.
The AD6634 is available in a 196-ball BGA package and operates over the industrial temperature range of 40 to +70C.
The price is $42.50 per unit in 1000-piece quantities.
Samples and evaluation boards are available now.
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