AD9858 is a 1GSPS direct digital synthesizer (DDS) with a built-in 10-bit D/A converter, supports automatic frequency sweeping, and is used in VHF/UHF LO synthesis, tuners, instrumentation, agile clock synthesis, cellular base station hopping synthesizers, radar, and Sonet/SDH clock synthesis.
The AD9858 is a 1 GSPS direct digital synthesizer with an integrated 10‑bit DAC, capable of operating with up to a 2 GHz input clock and providing fast frequency hopping and fine tuning resolution. It includes an on‑chip mixer, charge pump, and phase‑frequency detector for PLL‑DDS applications such as VHF/UHF LO synthesis, radar, and cellular base‑station hopping.
The document provides full electrical specifications, pin configurations, timing characteristics, and ordering options. It also includes application suggestions, ESD precautions, and evaluation board information for designers integrating the device into high‑frequency systems.
| Internal clock speed | 1 GSPS |
|---|---|
| Maximum input clock | 2 GHz (selectable divide‑by‑2) |
| DAC resolution | 10‑bit |
| Power supply voltage | 3.3 V |
| Typical power dissipation | 2 W |
| Operating temperature range | -40 °C to +85 °C |
| Phase noise (1 kHz offset) | < 145 dBc/Hz |
| DAC resolution (table) | 10 bits |
The AD9858 operates with a 1 GSPS internal clock speed.
It is specified for an industrial temperature range of –40 °C to +85 °C.
The device includes an integrated 10‑bit DAC.
The AD9858 is powered from a 3.3 V supply.