14-Bit, 2400 MSPS RF DAC
with 4-Channel Signal Processing
AD9789
The on-chip rate converter supports a wide range of baud rates
with a fixed DAC clock. The digital upconverter can place the
channels from 0 to 0.5 Г— fDAC. This permits four contiguous
channels to be synthesized and placed anywhere from dc to fDAC/2. FEATURES
DOCSIS 3.0 performance: 4 QAM carriers
ACLR over full band (47 MHz to 1 GHz)
-75 dBc @ fOUT = 200 MHz
-72 dBc @ fOUT = 800 MHz (noise)
-67 dBc @ fOUT = 800 MHz (harmonics)
Unequalized MER = 42 dB
On chip and bypassable
4 QAM encoders with SRRC filters, 16Г— to 512Г— interpolation,
rate converters, and modulators
Flexible data interface: 4, 8, 16, or 32 bits wide with parity
Power: 1.6 W (IFS = 20 mA, fDAC = 2.4 GHz, LVDS interface)
Direct to RF synthesis support with fS mix mode
Built-in self-test (BIST) support
Input connectivity check
Internal random number generator The AD9789 includes a serial peripheral interface (SPI) for
device configuration and status register readback. The flexible …