ADF4351 is a wideband frequency synthesizer with integrated VCO. It features programmable fractional-N and integer-N frequency synthesizers, low phase noise VCO, programmable prescaler, programmable output power level, etc. This product is suitable for wireless infrastructure, test equipment, wireless LANs, etc.
This document details the features of the ADF4351, a wideband synthesizer covering 35 MHz to 4.4 GHz output with a programmable VCO and low‑phase‑noise performance. It includes functional block diagrams, pin configurations, electrical characteristics, and typical performance graphs.
Additional sections cover absolute maximum ratings, thermal data, timing characteristics, application examples such as direct‑conversion modulators, and interfacing guidance for ADuC70xx microcontrollers and ADSP‑BF527 DSPs. The datasheet also provides PCB design guidelines and ordering information.
| Output frequency range | 35 MHz to 4400 MHz |
|---|---|
| Power supply voltage | 3.0 V to 3.6 V |
| Operating temperature range | −40 °C to +85 °C |
| VCO fundamental output frequency | 2200 MHz to 4400 MHz |
| Minimum RF output power | −4 dBm |
| Maximum RF output power | 5 dBm |
The device can generate output frequencies from 35 MHz up to 4.4 GHz.
It operates from a 3.0 V to 3.6 V power supply.
The ADF4351 is rated for an operating temperature range of –40 °C to +85 °C.