The ADF4108 frequency synthesizer is used to implement local oscillators in the up-conversion and down-conversion sections of wireless receivers and transmitters. It features an 8.0 GHz bandwidth, a 3.2 V to 3.6 V power supply, separate charge pump supply, programmable dual modulus prescaler, programmable charge pump currents, programmable antibacklash pulse width, 3-wire serial interface, analog and digital lock detect, and hardware and software power-down mode.
The document describes the ADF4108 frequency synthesizer, which implements local oscillators for up-conversion and down-conversion sections. Key features include an 8.0 GHz bandwidth, a low noise digital phase-frequency detector (PFD), a precision charge pump, and programmable reference dividers.
The datasheet provides comprehensive technical data including RF characteristics, timing specifications, absolute maximum ratings, and logic input/output parameters. It also covers the theory of operation for various internal blocks such as the prescaler, counters, and phase frequency detector.
| RF Input Frequency | 1.0/8.0 GHz min/max |
|---|---|
| Bandwidth | 8.0 GHz |
| Power Supply Voltage (AVDD) | 3.2 V to 3.6 V |
| Operating Temperature Range (B Version) | -40°C to +85°C |
| Maximum Supply Current (IDD) | 17 mA max |
The device operates from –40°C to +85°C.
The voltage must be between 3.2 V and 3.6 V.