AD9953 is a 400 MSPS, 14-bit, 1.8 V CMOS direct digital synthesizer with an integrated 14-bit DAC and 32-bit tuning word. It features excellent dynamic performance, >80 dB SFDR @ 160 MHz (±100 kHz offset), supports 5 V input levels, can be driven by a single crystal, and has phase modulation capability and multichip synchronization.
The AD9953 Rev. A is a direct digital synthesizer featuring a 400 MSPS internal clock, a 14‑bit DAC, and a 32‑bit frequency‑tuning word. It provides low phase noise, high dynamic range, and supports a wide range of applications such as agile VHF/UHF LO synthesis, radar chirp sources, and test equipment.
The datasheet includes electrical specifications, absolute maximum ratings, pin configurations, performance graphs, and suggested application circuits. It also lists ordering information for the 48‑lead TQFP/EP package and details on power‑down modes and synchronization features.
| Internal clock speed | 400 MSPS |
|---|---|
| DAC resolution | 14‑bit |
| Phase noise | ≤ –120 dBc/Hz @ 1 kHz offset |
| SFDR | >80 dB |
| Power supply voltage | AVDD, DVDD = 1.8 V ±5% |
| Package type | 48‑Lead TQFP/EP |
| Maximum junction temperature | 150°C |
The device operates with a 400 MSPS internal clock speed.
It includes an integrated 14‑bit DAC.
The part is supplied in a 48‑lead TQFP/EP package.