DAC38RF87 - Dual-Channel, 14-Bit, 6.2-GSPS, 6x-24x Interpolating, 6 GHz GSM PLL Digital-to-Analog Converter

The DAC38RF86/96 isa family of high-performance, dual-channel, 14-bit, 9-GSPS,RF-sampling digital-to-analog converters (DACs) that are capable of synthesizing wideband signalsfrom 0 to 4.5 GHz. The DAC38RF87/97 is also a family of high-performance,dual-channel, 14-bit, 6-GSPS, RF-sampling digital-to-analog converters (DACs) that are capable ofsynthesizing wideband signals from 0 to 3 GHz. A high dynamic range allows the DAC38RFxxfamily to generate signals for a wide range of applications including 3G/4G signals for wirelessbase-stations and radar.

The devices feature a low-power JESD204B Interface with up to 8 lanes with a maximum bitrate of 12.5 Gbps allowing an input data rate of 1.25 GSPS complex per channel. The DAC38RFxxprovides two digital up-converters per channel, with multiple options for interpolation rates. Adigital quadrature modulator with independent, frequency flexible NCOs are available to supportmulti-band operation. A GSM compliant low phase noise PLL/VCO is integrated to simplify the DAC samplingclock generation by allowing the use of a lower frequency reference clock

• 14-Bit Resolution
• Maximum DAC Sample Rate:
  • 9.0 GSPS (DAC38RF86, DAC38RF96)
  • 6.2 GSPS (DAC38RF87, DAC38RF97)
• Key Specifications:
  • RF Full-Scale Output Power at 2.1 GHz:0 dBm
  • Spectral Performance, DAC38RF87/97
    • f_DAC = 5898.24 MSPS, f_OUT = 2.14 GHz
      • WCDMA ACLR: 73 dBc
      • WCDMA alt-ACLR: 77 dBc
  • Spectral Performance, DAC38RF86/96
    • f_DAC = 8847.36 MSPS, f_OUT = 3.7 GHz
      • 20 MHz LTE ACLR: 66 dBc
    • f_DAC = 9 GSPS, f_OUT = 1.8 GHz, –6 dBFS
      • IMD3 = 70 dBc (10-MHz tone spacing)
• Dual-Band Digital Up-converter per DAC
  • 6, 8, 10, 12, 16, 18, 20 or 24x Interpolation
  • 4 Independent NCOs With 48-Bit Resolution
• JESD204B Interface, Subclass 1
  • Support for Multichip Synchronization
  • Maximum Lane Rate: 12.5 Gbps
• Single-Ended Output With Integrated Balun Covering 700 MHz to 3800 MHz
• Internal PLL and VCO
  • DAC38RF86/96: f_C(VCO) = 8.85 GHz
  • DAC38RF87/97: f_C(VCO) = 5.90 GHz
• Power Dissipation: 1.4 to 2.2 W/ch
• Power Supplies: –1.8 V, 1 V, 1.8 V
• Package: 10 x 10 mm BGA, 0.8 mm Pitch, 144-Balls

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