Products Digital to Analog Converter(DAC) Quadrature Digital Up Converters (QDUC)
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CD99D57BQ
Quadrature Digital Up Converters (QDUC)
1 GSPS orthogonal digital upconverter with built-in 18 bit IQ data path and 14 bit DAC
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Description
The CD99D57 functions as a universal I/Q modulator and agile upconverter for communications systems. The CD99D57 integrates a high speed, direct digital synthesizer (DDS), a high performance, high speed, 14-bit digital-to-analog converter (DAC), clock multiplier circuitry, digital filters, and other DSP functions onto a single chip. It provides baseband up conversion for data transmission in a wired or wireless communications system. It also provides excellent performance in terms of speed, power consumption and spectrum performance. The chip supports a 16-bit serial input mode for I/Q baseband data. The device can alternatively be programmed to operate either as a single tone, sinusoidal source or as an interpolating DAC. The chip achieves high speed internal sampling clock through a crystal oscillator, a high speed, divide-by-two input, and a low noise PLL.
  • Resolution(Bits):14 
  • Master clock(MHz):1000
  • Channel:1
  • SFDR(dB):80
  • Third-order intermodulation(dB):80
  • Power consumption(mw):560


  • power supplies:1.8 V and 3.3 V

  • Internal clock speed:1 GSPS (up to 400 MHz analog output)

  • Integrated 1 GSPS 14-bit DAC

  • Input data rate:250 MSPS

  • Phase noise ≤ −124dBc/Hz (400 MHz carrier @ 1 kHz offset)

  • Narrow-band SFDR:>80 dB

  • 8 programmable profiles register for shift keying Sinc correction filter

  • Reference clock multiplier

  • Internal oscillator for a single crystal operation

  • Software and hardware-controlled power-down

  • Integrated RAM

  • Phase modulation capability

  • Multichip synchronization

  • Easy interface to Blackfin SPORT

  • Interpolation factors from 4× to 252×

  • Gain control DAC

  • Internal divider allows references up to 2GHz

  • 100-lead TQFP package


  • HFC data, telephony, and video modems

  • Wireless base station transmissions

  • Broadband communications transmissions

  • Internet telephony


Parameters
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Part Number
Package
Resolution (bits)
Channels
Reference Clock Frequency (MHz)
Spurious-Free Dynamic Range (SFDR) (dB)
Third-Order Intermodulation (dB)
Power Consumption (mW)
Temp Range(°C)
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CD99D57BQ
1 GSPS orthogonal digital upconverter with built-in 18 bit IQ data path and 14 bit DAC
Datasheet
PackageTQFP-100
Resolution (bits) 14
Channels 1
Reference Clock Frequency (MHz) 1000
Spurious-Free Dynamic Range (SFDR) (dB) 80
Third-Order Intermodulation (dB) 80
Power Consumption (mW) --
Temp Range(°C) -40 to 85
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