Wideband IF Receiver Subsystem
Data Sheet
Wideband IF Receiver Subsystem AD6676
FEATURES
APPLICATIONS
High instantaneous dynamic range
Wideband ce...
Description
Data Sheet
Wideband IF Receiver Subsystem AD6676
FEATURES
APPLICATIONS
High instantaneous dynamic range
Wideband cellular infrastructure equipment and repeaters
Noise figure (NF) as low as 13 dB
Point-to-point microwave equipment
Noise spectral density (NSD) as low as −159 dBFS/Hz
Instrumentation
IIP3 up to 36.9 dBm with spurious tones <−99 dBFS
Spectrum and communication analyzers
Tunable band-pass Σ-Δ analog-to-digital converter (ADC)
Software defined radio
20 MHz to 160 MHz signal bandwidth 70 MHz to 450 MHz IF center frequency Configurable input full-scale level of −2 dBm to −14 dBm
Easy to drive resistive IF input Gain flatness of 1 dB with under 0.5 dB out-of-band peaking
Alias rejection greater than 50 dB 2.0 GSPS to 3.2 GSPS ADC clock rate
On-chip PLL clock multiplier 16-bit I/Q rate up to 266 MSPS On-chip digital signal processing NCO and quadrature digital downconverter (QDDC) Selectable decimation factor of 12, 16, 24, and 32 Automatic gain control (AGC) support On-chip attenuator with 27 dB span in 1 dB steps
GENERAL DESCRIPTION
The AD66761 is a highly integrated IF subsystem that can digitize radio frequency (RF) bands up to 160 MHz in width centered on an intermediate frequency (IF) of 70 MHz to 450 MHz. Unlike traditional Nyquist IF sampling ADCs, the AD6676 relies on a tunable band-pass Σ-Δ ADC with a high oversampling ratio to eliminate the need for band specific IF SAW filters and gain stages, resulting in significant simplification of the wid...
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