Technical datasheet for the AD9951, a 400 MSPS 14-bit CMOS direct digital synthesizer featuring an integrated DAC and programmable clock generators.
The AD9951 is a direct digital synthesizer (DDS) that features a 14-bit DAC operating up to 400 MSPS. It utilizes advanced DDS technology coupled with an internal high-speed, high-performance DAC to form a digitally programmable, complete high-frequency synthesizer capable of generating frequency-agile analog output sinusoidal waveforms at up to 200 MHz.
The device is designed for fast frequency hopping and fine tuning resolution using a 32-bit frequency tuning word. Frequency tuning and control words are loaded via a serial I/O port. The AD9951 operates over an extended industrial temperature range of –40°C to +105°C and includes features such as phase modulation capability, multichip synchronization, and support for 5 V input levels on most digital inputs.
| Internal Clock Speed | 400 MSPS |
|---|---|
| DAC Resolution | 14-bit |
| Operating Temperature Range | -40°C to +105°C |
| Full-Scale Output Current (Typ) | 5 mA |
| Wideband SFDR (1 MHz to 10 MHz) | 73 dBc |
| Power Consumption (Single-Tone Mode) | 162 mW |
The device can generate a frequency-agile analog output sinusoidal waveform at up to 200 MHz.
The frequency tuning and control words are loaded into the AD9951 via a serial I/O port.
The phase noise is less than or equal to –120 dBc/Hz @ 1 kHz offset (DAC output).