AFE7444 Quad-channel RF-sampling AFE with 14-bit 9-GSPS DAC and 3-GSPS ADC without bypass mode | TI.com

AFE7444 (ACTIVE) Quad-channel RF-sampling AFE with 14-bit 9-GSPS DAC and 3-GSPS ADC without bypass mode

 

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Description

The AFE7444 is a quad-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 800 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.

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.

Features

  • Four, 14-bit, 9-GSPS DACs
    • Up to 800-MHz signal bandwidth
    • 1 DSA per channel tunes output power
  • Four, 14-Bit, 3-GSPS ADCs
    • Up to 800-MHz signal bandwidth
    • NSD: –151 dBFS/Hz
    • AC performance at fIN = 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:
    • dual DDC per ADC
    • 3-phase coherent 32-bit NCOs per DDC
    • Decimation ratio: 3x to 32x
  • Transmit digital signal path:
    • Dual DUC per DAC with 32-bit NCOs
    • Interpolation ratio: 8x 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: 1.7 W/ch at 9 GSPS
  • ADC power dissipation: 1.8 W/ch at 3 GSPS
  • Package: 17-mm x 17-mm FC BGA, 0.8-mm pitch

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Parametrics

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Part number Order # of TX/RX # of DUCs/TX # of DDCs/RX Data rate (MSPS) Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
AFE7444 Order now 4T4R     2     2     750     -40 to 85     FCBGA | 400     See datasheet (FCBGA)    
AFE7422 Samples not available 2T2R     2     2     1500     -40 to 85     FCBGA | 400     See datasheet (FCBGA)