The AD6676 allows designers of high-performance communications and instrumentation equipment to reduce the complexity of their receiver designs while simultaneously achieving frequency planning flexibility and leading instantaneous dynamic range.
The AD6676 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 wideband radio receiver architecture.
On-chip quadrature digital down conversion followed by selectable decimation filters reduces the complex data rate to a manageable rate between 62.5 MSPS to 266.7 MSPS. The 16-bit complex output data is transferred to the host via a single or dual lane JESD204B interface supporting line rates up to 5.333 Gbps.
- High instantaneous dynamic range
- Noise figure (NF) as low as 13 dB
- Noise spectral density (NSD) as low as −159 dBFS/Hz
- IIP3 up to 36 dBm
- Spurious tones <−99 dBFS
- Tunable band-pass Σ-Δ analog-to-digital converter (ADC)
- 20 MHz to 160 MHz signal bandwidth
- 70 MHz to 450 MHz IF center frequency
- On-chip digital signal processing
- NCO and digital downconverter (DDC)
- 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
- Fast attenuator control via configurable AGC data port
Applications
- Multimode, wideband cellular infrastructure equipment
- Radar
- Point-to-point microwave equipment
- Instrumentation
- Spectrum and communication analyzers
- Software defined radio
Fonte - Analog Devices, Inc
