This document introduces the features of ADF4151, including frequency range, power supply, logic compatibility, pre-divider, RF output phase, serial interface, locking detection, switched bandwidth fast lock mode, cycle slip reduction and so on.
The ADF4151 is a fractional‑N and integer‑N phase‑locked loop (PLL) synthesizer that works with an external voltage‑controlled oscillator, loop filter, and reference frequency. It offers a 5 mm × 5 mm chip‑scale package, 3.0 V‑3.6 V analog supply, and a separate charge‑pump supply up to 5.5 V for extended tuning.
Key features include a programmable dual‑modulus prescaler (4/5 or 8/9), 3‑wire serial interface, programmable RF output phase, fast‑lock mode, and cycle‑slip reduction. The data sheet provides detailed specifications, timing diagrams, pin descriptions, and PCB design guidelines for optimal performance.
| Input Frequency Range | 10 – 250 MHz |
|---|---|
| RF Input Frequency Range | 0.5 – 3.5 GHz |
| Analog Supply Voltage (AVDD/DVDD) | 3.0 – 3.6 V |
| Operating Temperature Range | −40 °C to +85 °C |
| Package Size | 5 mm × 5 mm |
The device accepts an input frequency from 10 MHz up to 250 MHz.
The current is set by the external resistor RSET; a 5.1 kΩ resistor yields a charge‑pump current of 4.5 mA.