AD9850 is a highly integrated device that uses advanced DDS technology coupled with an internal high speed, high performance, D/A converter and comparator, to form a com- plete digitally programmable frequency synthesizer and clock generator function.
The AD9850 is a highly integrated DDS synthesizer that combines a high‑speed 10‑bit DAC and a comparator to generate a spectrally pure sine‑wave output. It supports parallel‑byte or serial loading of a 32‑bit frequency tuning word and offers phase‑modulation capability with fine resolution.
The device is supplied in a 28‑lead SSOP package, operates from a single +3.3 V or +5 V supply, and is specified for an industrial temperature range of –40 °C to +85 °C. Detailed electrical characteristics, pin functions, and typical performance graphs are provided for clock‑generator and frequency‑agile applications.
| Clock Input Frequency (5 V supply) | 125 MHz |
|---|---|
| Clock Input Frequency (3.3 V supply) | 110 MHz |
| Power‑Down Current (5 V) | 30 mW |
| Power‑Down Current (3.3 V) | 10 mW |
| Spurious‑Free Dynamic Range (SFDR) at 40 MHz | >50 dB |
| Operating Temperature Range | -40 °C to +85 °C |
With a +5 V supply the AD9850 accepts up to 125 MHz, and with a +3.3 V supply up to 110 MHz.
In power‑down the device draws about 30 mW on a +5 V supply and about 10 mW on a +3.3 V supply.
The AD9850 achieves a spurious‑free dynamic range greater than 50 dB at a 40 MHz analog output.
The AD9850 is available in a 28‑lead shrink small‑outline (SSOP) package.