The Analog Devices ADF4206/ADF4207/ADF4208 dual RF PLL frequency synthesizers are high performance, low power, low cost, small size PLL frequency synthesizers that can achieve a frequency range of 550 MHz to 2.0 GHz. It has a 2.7 V to 5.5 V power supply voltage, an optional charge pump supply (VP), allows extended tuning voltage in 3 V systems, optional charge pump currents, an integrated oscillator circuit, an optional dual modulus prescaler (RF2: 32/33 or 64/65, RF1: 32/33 or 64/65), a 3-wire serial interface and a power-down mode. This product is widely used in wireless handsets (GSM, PCS, DCS, CDMA, WCDMA, LTE, etc.), portable computers, automotive electronics, satellite communications, industrial control, medical equipment and other applications.
The ADF4206, ADF4207 and ADF4208 are dual RF PLL frequency synthesizer ICs intended for use in wireless handsets, base stations, LANs, test equipment and CATV applications. Each device integrates a low‑noise digital phase‑frequency detector, charge pump, programmable dividers and a dual‑modulus prescaler, allowing flexible N‑division synthesis.
The handbook lists electrical characteristics such as a 2.7 V‑5.5 V supply range, RF input frequencies from 50 MHz to 2 GHz, phase‑noise performance down to –173 dBc/Hz, and timing parameters for the 3‑wire serial interface. It also includes pin‑out tables, ordering information, mechanical dimensions and recommended interfacing to SPI‑compatible controllers.
| Power supply voltage | 2.7 V to 5.5 V |
|---|---|
| Operating temperature range (B version) | -40 °C to +85 °C |
| Maximum serial clock rate | 20 MHz |
The devices operate from 2.7 V to 5.5 V.
The B‑version devices are rated from –40 °C to +85 °C.
The maximum serial clock rate is 20 MHz.