AFE7422

• Two, 14-bit, 9-GSPS DACs
  • Up to 1200-MHz signal bandwidth
  • 1 DSA per channel tunes output power
• Two, 14-Bit, 3-GSPS ADCs
  • Up to 1500-MHz signal bandwidth
  • NSD: –151 dBFS/Hz
  • AC performance at f_IN = 2.6 GHz, –3 dBFS
    • SNR: 55 dBFS
    • SFDR: 73 dBc HD2 and HD3
    • SFDR: 91 dBc worst spur
  • 2 DSA per channel extends dynamic range
  • RF and digital power detectors
• RF frequency range: 10 MHz to 6 GHz
• Fast frequency hopping < 1 µs
• Receive digital signal path:
  • Bypassable quad DDC per ADC
  • 3-phase coherent 32-bit NCOs per DDC
  • Decimation ratio: 2x to 32x
• Transmit digital signal path:
  • Quad DUC per DAC with 32-bit NCOs
  • Interpolation ratio: 6x to 36x
  • Sin(x)/x correction and configurable delay
  • Power amplifier protection (PAP)
• JESD204B interface:
  • 8 transceivers at up to 15 Gbps
  • Subclass 1 multichip synchronization
• Clocks:
  • Internal PLL and VCO with bypass option
  • Clock output up to 3 GHz with clock divider
• DAC power dissipation: 1.8 W/ch at 9 GSPS
• ADC power dissipation: 1.9 W/ch at 3 GSPS
• Package: 17-mm x 17-mm FC BGA, 0.8-mm pitch

The AFE7422 is a dual-channel, wideband, RF-sampling analog front end (AFE) based on 14-bit, 9-GSPS DACs and 14-bit, 3-GSPS ADCs. With operation at an RF of up to 6 GHz, this device enables direct RF sampling into the C-band frequency range without the need for additional frequency conversions stages. This improvement in density and flexibility enables high-channel-count, multimission systems.

The DAC signal paths support interpolation and digital up conversion options that deliver up to 1200 MHz of signal bandwidth. The differential output path includes a digital step attenuator (DSA), which enables tuning of output power.

Each ADC input path includes a dual DSA and RF and Digital power detectors. Flexible decimation options provide optimization of data bandwidth and a decimation bypass mode is also available for widest signal bandwidth.

An 8-lane (8 TX + 8 RX) subclass-1 compliant JESD204B interface operates at up to 15 Gbps. A bypassable on-chip PLL simplifies clock operation with an optional clock output.