The AD9912 is a 1 GSPS direct digital synthesizer with integrated 14-bit DAC that provides high performance, low jitter, and compact passive LO frequency synthesis for a variety of applications.
The AD9912 Rev. F is a direct‑digital‑synthesizer (DDS) that integrates a 14‑bit digital‑to‑analog converter (DAC) and a 48‑bit frequency‑tuning word, providing fine frequency resolution of 4 µHz. It supports an internal 1 GSPS clock and can generate output frequencies directly up to 400 MHz, making it suitable for low‑jitter clock generation, test‑and‑measurement equipment, and wireless base‑station applications.
The device operates over an industrial temperature range (‑40 °C to +85 °C) and is supplied by multiple analog and digital rails (AVDD = 1.8 V ± 5%, AVDD3 = 3.3 V ± 5%, DVDD = 1.8 V ± 5%). Detailed specifications include power‑down modes, serial I/O control, and configurable output drivers (HSTL and CMOS). Pin‑out diagrams, timing tables, and absolute‑maximum ratings are provided for board designers.
| Internal clock speed | 1 GSPS |
|---|---|
| Maximum output frequency | 400 MHz |
| Frequency tuning word resolution | 4 µHz |
| AVDD supply voltage | 1.8 V ± 5 % |
| AVDD3 supply voltage | 3.3 V ± 5 % |
| Operating temperature range | ‑40 °C to +85 °C |
The device can generate output frequencies directly up to 400 MHz.
It uses AVDD = 1.8 V ± 5 %, AVDD3 = 3.3 V ± 5 %, and DVDD = 1.8 V ± 5 % among other rails.
The 48‑bit frequency‑tuning word provides a resolution of 4 µHz.
It is rated for operation from ‑40 °C to +85 °C.