Digital phase-locked loop (DPLL) device with automatic frequency range selection, comprising: - a multiband voltage-controlled oscillator module having: an output for delivering a VCO signal with a VCO frequency pertaining to one frequency range selected among several frequency ranges available; at least one digital input suitable for selecting the frequency range based on a code value (W0, W1, W2) received at said digital input; and an analog input suitable for receiving a VCO-control voltage (V tune), so that each value for the VCO frequency within the frequency range selected is produced for one value of the VCO-control voltage; - a frequency converter connected for being fed with the VCO signal, and suitable for outputting a phase signal derived from the VCO signal by Q-dividing the VCO frequency, Q being a non-zero division factor; - a time-to-digital converter having a first input for receiving a reference phase signal from a reference clock, and a second input for receiving the phase signal outputted by the frequency converter, and an output for delivering a digital PLL-error signal; - a digital loop filter having: an input connected to the output of the time-to-digital converter; and a VCO-loop output suitable for delivering a digital VCO-control signal based on a filtering of the digital PLL-error signal as received at the input of said digital loop filter; - a digital-to-analog converter connected at input to the VCO-loop output of the digital loop filter, and connected at output to the analog input of the multiband VCO module, so that the VCO-control voltage (V tune) is produced based on the digital VCO-control signal; the DPLL device being characterized in that the digital loop filter further has a DCO-loop output suitable for delivering the code value (W0, W1, W2) also based on a filtering of the digital PLL-error signal as received at the input of said digital loop filter; and in that the DPLL device further comprises: - a lock detector arranged for detecting from the digital PLL-error signal whether a lock condition of the DPLL device is met; and - a DCO controller arranged for transmitting the code value (W0, W1, W2) to the digital input of the multiband VCO module, and for controlling several successive operations of the DPLL device, comprising: at least one frequency range selection operation (S1, S2, S3) where the VCO-control voltage (V tune) is maintained at fixed voltage value and the code value (W0, W1, W2) varies until the lock condition is met; and then an analog VCO-tuning operation where a final code value corresponding to the meeting of the lock condition, is maintained at the digital input of the multiband VCO module, and the digital VCO-control signal varies so as to maintain the lock condition. - a multiband voltage-controlled oscillator module having: an output for delivering a VCO signal with a VCO frequency pertaining to one frequency range selected among several frequency ranges available; at least one digital input suitable for selecting the frequency range based on a code value (W0, W1, W2) received at said digital input; and an analog input suitable for receiving a VCO-control voltage (V tune), so that each value for the VCO frequency within the frequency range selected is produced for one value of the VCO-control voltage; an output for delivering a VCO signal with a VCO frequency pertaining to one frequency range selected among several frequency ranges available; at least one digital input suitable for selecting the frequency range based on a code value (W0, W1, W2) received at said digital input; and an analog input suitable for receiving a VCO-control voltage (V tune), so that each value for the VCO frequency within the frequency range selected is produced for one value of the VCO-control voltage; - a frequency converter connected for being fed with the VCO signal, and suitable for outputting a phase signal derived from the VCO signal by Q-dividing the VCO frequency, Q being a non-zero division factor; - a time-to-digital converter having a first input for receiving a reference phase signal from a reference clock, and a second input for receiving the phase signal outputted by the frequency converter, and an output for delivering a digital PLL-error signal; - a digital loop filter having: an input connected to the output of the time-to-digital converter; and a VCO-loop output suitable for delivering a digital VCO-control signal based on a filtering of the digital PLL-error signal as received at the input of said digital loop filter; an input connected to the output of the time-to-digital converter; and a VCO-loop output suitable for delivering a digital VCO-control signal based on a filtering of the digital PLL-error signal as received at the input of said digital loop filter; - a digital-to-analog converter connected at input to the VCO-loop output of the digital loop filter, and connected at output to the analog input of the multiband VCO module, so that the VCO-control voltage (V tune) is produced based on the digital VCO-control signal; - a lock detector arranged for detecting from the digital PLL-error signal whether a lock condition of the DPLL device is met; and - a DCO controller arranged for transmitting the code value (W0, W1, W2) to the digital input of the multiband VCO module, and for controlling several successive operations of the DPLL device, comprising: