AD6624 Datasheet | Analog Devices

.. a Features 80 MSPS Wide Band Inputs (14 Linear Bits Plus 3 RSSI) Dual High Speed Data Input Ports Four Independent Digital Receivers in Single Package Digital Resampling for Noninteger Decimation Rates Programmable Decimating FIR Filters Programmable Attenuator Control for Clip Prevention and External Gain Ranging via Level Indicator Flexible Control for Multicarrier and Phased Array 3.3 V I/O, 2.5 V CMOS Core User-Configurable Built-In Self-Test (BIST) Capability JTAG Boundary Scan APPLICATIONS Multicarrier, Multimode Digital Receivers GSM, IS136, EDGE, PHS, IS95 Micro and Pico Cell Systems Wireless Local Loop Smart Antenna Systems Software Radios In-Building Wireless Telephony PRODUCT DESCRIPTION Four-Channel, 80 MSPS Digital Receive Signal Processor (RSP) AD6624 The AD6624 is part of Analog Devices’ Soft Cell® multicarrier transceiver chipset designed for patibility with Analog Devices’ family of high sample rate IF sampling ADCs (AD6640/ AD6644 12- and 14-bit). The Soft Cell receiver prises a digital receiver capable of digitizing an entire spectrum of carriers and digitally selecting the carrier of interest for tuning and channel selection. This architecture eliminates redundant radios in wireless base station applications. High dynamic range decimation filters offer a wide range of decimation rates. The RAM-based architecture allows easy reconfiguration for multimode applications. The decimating filters remove unwanted signals and noise from the channel of interest. When the channel of interest occupies less bandwidth than the input signal, this rejection of out-of-band noise is called “processing gain.” By using large decimation factors, this “processing gain” can improve the SNR of the ADC by 30 d B or more. In addition, the programmable RAM coefficient filter allows antialiasing, matched filtering, and static equalization functions to be bined in a single, costeffective filter. The AD6624 is patible with standard ADC...