Datasheet

AD5933 Data Sheet
Rev. E | Page 22 of 40
PERFORMING A FREQUENCY SWEEP
PROGRAM THE AD5933
IN
TO POWER-DOWN MODE.
PLACE THE AD5933 INT
O S
TANDB
Y MODE.
PROGRAM FREQUENC
Y
SWEEP
PARAMETERS
INT
O RELE
VANT REGISTERS
(1) S
TART FREQUENC
Y
REGISTER
(2) NUMBER OF INCREMENTS REGISTER
(3) FREQUENCY
INCREMENT REGISTER
READ V
ALUES FROM REAL AND
IMAGINARY
DATA
REGISTER.
PROGRAM INITIALIZE WITH ST
ART
FREQUENCY COMMAND
T
O THE CONTROL
REGISTER.
AFTER
A SUFFICIENT AMOUNT OF SETTLING
TIME HAS ELAPSED, PROGRAM START
FREQUENCY SWEEP COMMAND IN THE
CONTROL REGISTER.
POLL STATUS REGISTER TO CHECK IF
THE DFT CONVERSION IS COMPLETE.
RESE
T
: BY
ISSUING A
RESET COMMAND T
O
CONTRO
L
REGISTER THE DEVICE IS PLACED
IN STANDBY MODE.
PROGRAM THE INCREMENT FREQUENCY
OR
THE REPE
AT FREQUENCY COMMAND
TO THE
CONTROL REGISTER.
Y
Y
Y
N
N
POLL S
TATUS REGISTER TO CHECK IF
FREQUENCY SWEEP IS COMPLETE.
05324-034
Figure 28. Frequency Sweep Flow Chart