AD9709ASTZ

AD9709 is a dual-port, high speed, 2-channel, 8-bit CMOS DAC. It integrates two high quality 8-bit TxDAC+® cores, a voltage reference, and digital interface circuitry. The AD9709 offers exceptional ac and dc performance while supporting update rates of up to 125 MSPS. The AD9709 has been optimized for processing I and Q data in communications applications. The digital interface consists of two double-buffered latches as well as control logic. Separate write inputs allow data to be written to the two DAC ports independent of one another. Separate clocks control the update rate of the DACs. A mode control pin allows the AD9709 to interface to two separate data ports, or to a single interleaved high speed data port. In interleaving mode, the input data stream is demuxed into its original I and Q data and then latched. Application includes communications, base stations, digital synthesis, quadrature modulation, 3D ultrasound.

• 8-bit dual transmit digital-to-analogue converter (DAC)
• Excellent SFDR to Nyquist at 5MHz output: 66dBc
• Excellent gain and offset matching is 0.1%
• Fully independent or single-resistor gain control, dual port or interleaved data
• On-chip 1.2V reference, single 5V or 3.3V supply operation range
• Power dissipation is 380mW (typ, 5V, IOUTFS = 20mA)
• Resolution is 8bits (min, TMIN to TMAX, AVDD = 3.3V or 5V)
• Integral linearity error (INL) is ±0.1LSB (typ, TMIN to TMAX, AVDD = 3.3V or 5V)
• Differential nonlinearity (DNL) is ±0.1LSB (typ, TMIN to TMAX, AVDD = 3.3V or 5V)
• 48 lead LQFP package, operating temperature range from -40°C to +85°C

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