The ADF41513 is designed on a high performance silicon geranium (SiGe), bipolar complementary metal-oxide semiconductor (BiCMOS) process, achieving a normalized phase noise floor of -235dBc/Hz. The phase frequency detector (PFD) operates up to 250MHz (integer-N mode)/125MHz (fractional-N mode) for improved phase noise and spur performance. The variable modulus, ∑-Δ modulator allows extremely fine resolution when using a 49-bit divide value. The ADF41513 can be used as an integer-N PLL, or it can be used as a fractional-N PLL with either a fixed modulus for subhertz frequency resolution or variable modulus for subhertz exact frequency resolution.
The ADF41513 PLL Synthesizer is offered in a compact, 24-lead, 4mm × 4mm Leadframe Chip Scale Package (LFCSP), ideal for space constrained applications.