EVAL-ADF7021DBZ5 Datasheet, PDF (43/64 Pages) Analog Devices – High Performance Narrow-Band Transceiver IC

Data Sheet
TCXO
REFERENCE
CE HIGH
WAIT 10µs (REGULATOR POWER-UP)
POWER-DOWN
CE LOW
XTAL
REFERENCE
ADF7021
CE HIGH
WAIT 10µs + 1ms
(REGULATOR POWER-UP + TYPICAL XTAL SETTLING)
OPTIONAL.
WRITE TO REGISTER 1 (TURNS ON VCO)
WAIT 0.7ms (TYPICAL VCO SETTLING)
WRITE TO REGISTER 3 (TURNS ON Tx/Rx CLOCKS)
WRITE TO REGISTER 6 (SETS UP IF FILTER CALIBRATION)
WRITE TO REGISTER 5 (STARTS IF FILTER CALIBRATION)
WAIT 0.2ms (COARSE CAL) OR WAIT 5.2ms
(COARSE CALIBRATION + FINE CALIBRATION)
WRITE TO REGISTER 11 (SET UP SWD)
WRITE TO REGISTER 12 (ENABLE SWD)
WRITE TO REGISTER 0 (TURNS ON PLL)
WAIT 40µs (TYPICAL PLL SETTLING)
WRITE TO REGISTER 4 (TURNS ON DEMOD)
WRITE TO REGISTER 10 (TURNS ON AFC)
Rx MODE
CE LOW
POWER-DOWN
Figure 55. Power-Up Sequence for Receive Mode
OPTIONAL:
ONLY NECESSARY IF
IF FILTER FINE CAL IS REQUIRED.
OPTIONAL:
ONLY NECESSARY IF
SWD IS REQUIRED.
OPTIONAL:
ONLY NECESSARY IF
AFC IS REQUIRED.
Rev. B | Page 43 of 64