AD9954 Rev. B is a 400 MSPS, 14-bit, 1.8V CMOS, direct digital synthesizer. It features a 400 MSPS internal clock speed, integrated 14-bit DAC, programmable phase/amplitude dithering, 32-bit frequency tuning accuracy, 14-bit phase tuning accuracy, and more.
The AD9954 Direct Digital Synthesizer from Analog Devices provides a high‑speed 400 MSPS internal clock, a 14‑bit DAC, and fine‑resolution frequency and phase tuning. It is designed for applications such as agile LO synthesis, programmable clock generation, radar chirp sources, and test‑and‑measurement equipment.
The device includes a 48‑lead TQFP package with an exposed pad, on‑chip RAM for waveform storage, a high‑speed comparator for square‑wave output, and flexible clocking options via an internal oscillator or external reference. Detailed specifications, pin descriptions, and programming examples are provided throughout the document.
| Internal clock speed | 400 MSPS |
|---|---|
| DAC resolution | 14‑bit |
| Frequency tuning accuracy | 32‑bit |
| Phase tuning accuracy | 14‑bit |
| Power supply voltage | 1.8 V (AVDD, DVDD) |
| Maximum operating temperature | +105 °C |
| Package type | 48‑lead TQFP with exposed pad |
The AD9954 operates with a maximum internal clock speed of 400 MSPS.
The device uses a 1.8 V supply for AVDD and DVDD pins.
The AD9954 is rated for operation up to +105 °C.
The AD9954 is supplied in a 48‑lead TQFP package.