The ADF5000 is a low-noise, low-power, fixed RF divider block that can be used to divide frequencies as high as 18 GHz by 2 to produce a lower frequency suitable for input to a PLL IC, such as the ADF4156 or the ADF4106.
The ADF5000 is a low‑noise, low‑power RF divide‑by‑2 prescaler that operates from 4 GHz to 18 GHz. It runs on a single 3.3 V supply, draws 30 mA in active mode and 17 mA in power‑down mode, and works over an industrial temperature range of –40 °C to +105 °C. The device offers differential 100 Ω RF outputs and integrated decoupling capacitors in a 3 mm × 3 mm LFCSP package.
Key features include high‑frequency operation, low phase noise (‑147 dBc/Hz at 100 kHz offset), and a small footprint. The handbook lists pin functions, absolute maximum ratings, typical performance curves, and an evaluation board layout with SMA connectors for easy integration into PLL designs such as the ADF4156.
| Input Frequency | 4 GHz – 18 GHz |
|---|---|
| Output Power | -10 dBm to 5 dBm |
| Phase Noise | -147 dBc/Hz (100 kHz offset) |
| Supply Voltage | 3.0 V – 3.6 V (typical 3.3 V) |
| Active Mode Current | 30 mA (typical) |
| Power‑Down Mode Current | 17 mA (typical) |
| Package Size | 3 mm × 3 mm LFCSP |
| RF Input Sensitivity | –10 dBm to +10 dBm |
The ADF5000 operates from 4 GHz up to 18 GHz.
In active mode the device typically draws 30 mA.
It requires a single 3.3 V supply, with a permissible range of 3.0 V to 3.6 V.
The device achieves a phase‑noise of –147 dBc/Hz at a 100 kHz offset.