ADI ADF4158CCPZ-RL7

The ADF4158 is a 6.1 GHz fractional-N frequency synthesizer with modulation and waveform generation capabilities, featuring a 25-bit fixed modulus that provides sub-Hz frequency resolution at 6.1 GHz. It consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. The device incorporates an on-chip Σ-Δ fractional interpolator, enabling programmable modulus fractional-N division. The INT and FRAC registers form a combined N divider (N = INT + (FRAC/2^25)). The ADF4158 supports FSK and PSK modulation. Multiple frequency sweep modes are available to generate various waveforms in the frequency domain, such as sawtooth and triangular waves. The ADF4158 features a cycle slip reduction circuit that further shortens lock time without modifying the loop filter. All on-chip registers are controlled via a simple 3-wire interface. The device operates from a 2.7 V to 3.3 V supply and can be powered down when not in use.

• RF bandwidth up to 6.1 GHz
• 25-bit fixed modulus for sub-Hz frequency resolution
• Frequency and phase modulation capability
• Sawtooth and triangle waveforms in the frequency domain
• Parabolic ramp
• Ramp with FSK overlay
• Ramp with 2 different sweep rates
• Ramp delay
• Ramp frequency readback
• Ramp interrupt
• 2.7 V to 3.3 V supply voltage
• Separate charge pump supply VP for extended tuning voltage
• Programmable charge pump current
• 3-wire serial interface
• Digital lock detect
• Power-down mode
• Reduced cycle slip for faster lock time
• Fast lock mode over wide bandwidth
• Qualified for automotive applications

• FMCW radar
• Communication test equipment