Quadrature direct digital synthesizer integrates a high speed numerically controlled oscillator with dual 12-bit D/A converters. The device supports a 300 MSPS system clock and uses a 48-bit frequency tuning word for fine frequency resolution. Programmable features include 14-bit phase offset control, 12-bit amplitude scaling, FSK, BPSK, chirp, and shaped-keying operation. The device operates from a 3.3 V supply and includes a programmable reference clock multiplier and inverse sinc filter.
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| Function | Quadrature complete direct digital synthesizer |
| Maximum system clock rate | 300MSPS |
| Frequency tuning word width | 48bit |
| Frequency resolution at 300 MHz clock | 0.000001Hz |
| DAC resolution | 12bit |
| Number of DACs | 2 |
| Phase offset resolution | 14bit |
| Amplitude scale factor resolution | 12bit |
| Supply voltage | 3.3V |
| Reference clock multiplier range | 4x to 20x |
| Modulation modes | FSK, BPSK, chirp, amplitude modulation |
| Digital interface | Serial or 8-bit parallel programming interface |
| Integrated filter | Inverse sinc filter |
| Integrated comparator | High speed comparator |
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