ADI Confidential AD9361 Calibration Guide
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OVERVIEW
The AD9361 powers up into a SLEEP state for minimal power consumption. Before the AD9361 is operational, its clocks must be
enabled and initial calibrations completed as shown in the example scripts generated from the AD9361 Evaluation Software. The purpose
of this document is to describe in detail the operation of the different initialization calibrations as well as suggested factory calibrations.
Table 1 below lists the initialization calibrations documented in this guide. Table 2 below shows the factory calibrations suggested in this
guide.
# Calibration Run Frequency Calibration Done Bit
1 BBPLL VCO Calibration Once, Any time BBPLL Frequency changes 0x5E[7], 1 when locked
2 RF Synthesizer Charge Pump
Calibration
Once RX: 0x244[7], 1 when done
TX: 0x284[7], 1 when done
3 RF Synthesizer VCO calibration Occurs automatically when integer frequency word written.
In TDD, occurs when TXNRX changes logic level.
RX: 0x247[1], 1 when locked
TX: 0x287[1], 1 when locked
4 Baseband RX Analog Filter Tune Once, update when BW changes 0x016[7], Self clears when done
5 Baseband TX Analog Filter Tune Once, update when BW changes 0x016[6], Self clears when done
6 Baseband TX Secondary Filter Tune Once - Manual Equations, update when BW changes
7 RX TIA Calibration Once - Manual Equations, update when BW changes
8 RX ADC Setup Once – Manual LUT or equations, update when ADC
sampling rate changes
9 Baseband DC Offset Once 0x016[0], Self clears when done
10 RF DC Offset Any time LO Frequency changes more than 100 MHz 0x016[1], Self clears when done
11 RX Quadrature Calibration Any time LO Frequency changes more than 100 MHz Tracking runs continuously
12 TX Quadrature Calibration Any time LO Frequency changes more than 100 MHz 0x016[4], Self clears when done
Table 1: Initialization Calibrations Detailed in this Document
# Factory Calibration
1 Internal DCXO (AFC tune range)
2 TX RSSI (TX Monitor)
3 RX RSSI (Absolute Power Correlation)
4 RX GM / LNA Gain Step Error
5 TX Power out Vs TX attenuation
6 TX Power out Vs Frequency
Table 2: Factory Calibrations Detailed in this Document
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