Initialization And Calibration; Overview - Analog Devices AD9361 Reference Manual

UG-570

INITIALIZATION AND CALIBRATION

OVERVIEW

The AD9361 powers up into a sleep state for minimal power consumption. Before the
enabled and initial calibrations completed. The purpose of this section is to describe in detail the operation of the different initialization
calibrations.
Table 1 lists the initialization calibrations documented in this section.
Table 1. Initialization Calibrations Detailed in this Section
Calibration
BBPLL VCO calibration
RF synthesizer charge pump
calibration
RF synthesizer VCO calibration
Baseband Rx analog filter tune
Baseband Tx analog filter tune
Baseband Tx secondary filter tune
Rx TIA calibration
Rx ADC setup
Baseband DC offset
RF DC offset
Rx quadrature calibration
Tx quadrature calibration
Run Frequency
Once; any time BBPLL frequency changes
Once
Occurs automatically when integer frequency word written. In TDD, occurs when TXNRX
changes logic level.
Once; update when BW changes
Once; update when BW changes
Once; manual equations, update when BW changes
Once; manual equations, update when BW changes
Once; manual LUT or equations, update when ADC sampling rate changes
Once
Any time LO frequency changes more than 100 MHz
Any time LO frequency changes more than 100 MHz
Any time LO frequency changes more than 100 MHz
Rev. A
AD9361
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AD9361 Reference Manual
is operational, its clocks must be
Calibration Done Bit
0x5E[7], 1 when locked
Rx: 0x244[7], 1 when done
Tx: 0x284[7], 1 when done
Rx: 0x247[1], 1 when locked
Tx: 0x287[1], 1 when locked
0x016[7], self clears when
done
0x016[6], self clears when
done
0x016[0], self clears when
done
0x016[1], self clears when
done
Tracking runs continuously
0x016[4], self clears when
done