This data sheet introduces the ADF4158, a 6.1 GHz, fractional-N frequency synthesizer with a 25-bit fixed modulus that allows subhertz frequency resolution, frequency and phase modulation capability, sawtooth and triangular waveforms in the frequency domain, parabolic ramp, superimposed FSK ramp, ramp with 2 different sweep rates, ramp delay, ramp frequency readback, ramp interruption, 2.7 V to 3.3 V power supply, separate VP allows extended tuning voltage, programmable charge pump currents, 3-wire serial interface, digital lock detect, power-down mode, cycle slip reduction for faster lock times, switched bandwidth fast-lock mode, qualified for automotive applications.
The ADF4158 is a 6.1 GHz fractional‑N frequency synthesizer that provides frequency, phase, and waveform generation capabilities. It features a 25‑bit fixed modulus for sub‑hertz resolution, a low‑noise digital phase‑frequency detector, programmable charge pump, and a 3‑wire serial interface for register control.
The device operates from a 2.7 V‑3.3 V supply (AVDD/DVDD) with a Vp up to 5.5 V, supports automotive‑grade reliability, and offers multiple modulation and sweep modes such as FSK, PSK, sawtooth, and triangular waveforms.
| RF Input Frequency | 0.5 GHz – 6.1 GHz |
|---|---|
| Power Supply (AVDD/DVDD) | 2.7 V to 3.3 V |
| Charge Pump Supply (Vp) | up to 5.5 V |
| Phase Detector Frequency | 32 MHz |
| Charge Pump High Current | 5 mA |
| Charge Pump Low Current | 312.5 pA |
| Operating Temperature (Industrial) | -40 °C to +125 °C |
| Programming Interface | 3‑wire serial (CLK, DATA, LE) |
| Automotive Qualification | Qualified for automotive applications |
The device operates from 2.7 V to 3.3 V for AVDD/DVDD, and the Vp pin can be up to 5.5 V.
All on‑chip registers are programmed via a simple 3‑wire serial interface (CLK, DATA, LE).
Yes, the ADF4158 is qualified for automotive applications.
The maximum RF input frequency is 6.1 GHz.