The ADF4158 is a 6.1 GHz fractional-N frequency synthesizer with an RF bandwidth up to 6.1 GHz. It features a 25-bit fixed modulus that allows subhertz frequency resolution. In addition to frequency synthesis, it also has frequency and phase modulation capability, as well as the ability to generate sawtooth and triangular waveforms in the frequency domain. Furthermore, it has functions such as parabolic ramp, ramp superimposed with FSK, ramp with 2 different sweep rates, ramp delay, ramp frequency readback, and ramp interruption. The product is suitable for applications such as FMCW radar and communications test equipment, and it is qualified for automotive applications.
The ADF4158 fractional‑N synthesizer provides RF output up to 6.1 GHz with sub‑hertz resolution, supporting frequency and phase modulation, various sweep waveforms, and fast‑lock features. It operates from a 2.7 V to 3.3 V supply and includes a 3‑wire serial interface for register control.
The device is offered in a 24‑lead LFCSP package, qualified for automotive applications, and includes detailed specifications for RF input, reference inputs, charge‑pump currents, and timing parameters. Pin‑out, absolute maximum ratings, and ordering information are provided for designers.
| RF Input Frequency | 0.5 GHz – 6.1 GHz |
|---|---|
| Power Supply Voltage (AVop/DVpp) | 2.7 V to 3.3 V |
| Phase Detector Frequency | 32 MHz |
| Charge Pump High‑Value Current | 5 mA |
| Charge Pump Low‑Value Current | 312.5 pA |
| Operating Temperature (Industrial) | -40 °C to +125 °C |
The device operates from 2.7 V to 3.3 V.
It supports RF input frequencies from 0.5 GHz up to 6.1 GHz.
Yes, the ADF4158 is qualified for automotive applications.
The phase detector operates at 32 MHz.