Analog Devices, Inc. (NASDAQ: ADI) (Norwood, MA) has introduced a new quad IF D/A converter. The AD9144 4-channel, 16-bit, 2.8-GSPS D/A converter supports high data rates and ultra-wide signal bandwidth enabling emerging wideband and multiband wireless applications. 

The combination of programmable interpolation rate, high sample rates and low power at 1.5 W gives system designers flexibility when choosing D/A converter output frequencies. This is especially helpful in meeting four- to six-carrier GSM transmission specifications and other communications standards. For six carrier GSM IMD, the AD9144 operates at 77 dBc at 75-MHZ IF. Operating with the on-chip PLL (phase-locked loop) at a D/A converter output frequency of 30 MHz, the AD9144 delivers a 76-dB adjacent-channel leakage ratio (ACLR) for four-carrier WCDMA applications. 

The AD9144 includes integrated interpolation filters with selectable interpolation factors of 2, 4, and 8. The dual D/A converter data interface supports word and byte load allowing customers to reduce input pins on lower data rates to save board space, power, and cost. 

The AD9144 features:

  • 82 dBc spurious-free dynamic range (SFDR).
  • Maximum sample rate of 2.8 GSPS.
  • -164 dBm/Hz noise spectral density.
  • JESD204B eight-lane interface.
  • Low inherent latency of under two D/A converter clock cycles.

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