AD9851 is a highly integrated device that utilizes advanced DDS technology and features a high-performance DAC and high-speed comparator. It can generate stable frequency and phase programmable analog sine wave output, making it suitable for applications such as digital communication devices and quadrature oscillators.
The AD9851 integrates a high‑speed DDS core, a 10‑bit DAC and a fast comparator to provide a digitally programmable frequency synthesizer and clock generator. It accepts a 180 MHz reference clock and can multiply it by six, delivering stable analog sine‑wave outputs up to 72 MHz.
The device operates from a single supply of +2.7 V to +5.25 V, consumes as little as 4 mW at low voltage, and is offered in a compact 28‑lead SSOP package. Detailed pin descriptions, clock input characteristics, and programming examples are included for easy integration. This manual is written in Chinese.
| Reference clock rate | 180 MHz |
|---|---|
| DAC resolution | 10‑bit |
| Supply voltage range | +2.7 V to +5.25 V |
| Power consumption @ 180 MHz | 555 mW |
| Package | 28‑lead SSOP |
| Output frequency range | 0 – 72 MHz |
| SFDR (70 MHz) | 43 dB |
| Comparator jitter | < 80 ps p‑p @ 20 MHz |
The AD9851 can operate with a reference clock up to 180 MHz.
The device includes a 10‑bit digital‑to‑analog converter.
It works from +2.7 V up to +5.25 V.
The analog output can cover frequencies from 0 to 72 MHz.