ADF4382 Fast Calibration Feature
In many phase-locked loop frequency generation applications, reducing lock time between frequencies is of critical importance. The ADF4382 uses a dual-core, multi-band VCO architecture that enables a wide octave frequency range from 11 GHz to 22 GHz. The default method for frequency selection uses an auto-calibration routine to select the appropriate VCO core and band internally, which typically takes 100μs. This presentation details the innovative FastCal™ feature which uses an on-chip Look-up table approach, allowing users to bypass the autocalibration routine. Thereby reducing the time taken to lock from one frequency to another, to effectively just loop filter settling time.
ADF4382 Fast Calibration Feature
In many phase-locked loop frequency generation applications, reducing lock time between frequencies is of critical importance. The ADF4382 uses a dual-core, multi-band VCO architecture that enables a wide octave frequency range from 11 GHz to 22 GHz. The default method for frequency selection uses an auto-calibration routine to select the appropriate VCO core and band internally, which typically takes 100μs. This presentation details the innovative FastCal™ feature which uses an on-chip Look-up table approach, allowing users to bypass the autocalibration routine. Thereby reducing the time taken to lock from one frequency to another, to effectively just loop filter settling time.
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