EVAL-ADF7021DBZ5 Datasheet, PDF (42/64 Pages) Analog Devices – High Performance Narrow-Band Transceiver IC

ADF7021
TCXO
REFERENCE
CE HIGH
WAIT 10µs (REGULATOR POWER-UP)
POWER-DOWN
CE LOW
XTAL
REFERENCE
Data Sheet
CE HIGH
WAIT 10µs + 1ms
(REGULATOR POWER-UP + TYPICAL XTAL SETTLING)
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 0 (TURNS ON PLL)
WAIT 40µs (TYPICAL PLL SETTLING)
WRITE TO REGISTER 2 (TURNS ON PA)
WAIT FOR PA TO RAMP UP (ONLY IF PA RAMP ENABLED)
Tx MODE
WAIT FOR Tx LATENCY NUMBER OF BITS
(REFER TO TABLE 12)
WRITE TO REGISTER 2 (TURNS OFF PA)
WAIT FOR PA TO RAMP DOWN
CE LOW
POWER-DOWN
OPTIONAL. ONLY NECESSARY IF PA
RAMP DOWN IS REQUIRED.
Figure 54. Power-Up Sequence for Transmit Mode
Rev. B | Page 42 of 64