AD9832(RevA) 데이터 시트보기 (PDF) - Analog Devices
부품명
상세내역
제조사
AD9832 Datasheet PDF : 16 Pages
| |||
AD9832
DATA WRITE**
FREG<0> = fOUT0/fMCLK*232
FREG<1> = fOUT1/fMCLK*232
PHASEREG <3:0> = DELTA PHASE<0, 1, 2, 3>
SELECT DATA SOURCES***
SET FSELECT
SET PSEL0, PSEL1
INITIALIZATION*
WAIT 6 MCLK CYCLES (8 MCLK CYCLES IF SYNC = 1)
DAC OUTPUT
VOUT = VREFIN*6.25*ROUT/RSET*(1 + SIN(2 (FREG*fMCLK*t/232 + PHASEREG/212)))
CHANGE FSELECT
YES
CHANGE PHASE?
NO
NO
CHANGE fOUT?
YES
NO
CHANGE fOUT?
CHANGE PHASEREG? NO CHANGE PSEL0, PSEL1
YES
YES
Figure 22. Flow Chart for AD9832 Initialization and Operation
INITIALIZATION*
CONTROL REGISTER WRITE
SET SLEEP
RESET = 1
CLR = 1
YES
SET SYNC AND/OR SELSRC TO 1
NO
CONTROL REGISTER WRITE
SYNC = 1
AND/OR
SELSRC = 1
WRITE INITIAL DATA
FREG<0> = fOUT0/fMCLK*232
FREG<1> = fOUT1/fMCLK*232
PHASEREG<3:0> = DELTA PHASE<0, 1, 2, 3>
SET PINS OR FREQUENCY/PHASE REGISTER WRITE
SET FSELECT, PSEL0 AND PSEL1
CONTROL REGISTER WRITE
SLEEP = 0
RESET = 0
CLR = 0
Figure 23. Initialization
DATA WRITE**
DEFERRED TRANSFER WRITE
WRITE 8 BITS TO DEFER REGISTER
DIRECT TRANSFER WRITE
WRITE PRESENT 8 BITS AND 8 BITS IN
DEFER REGISTER TO DATA REGISTER
CHANGE 16 BITS
YES
NO
WRITE ANOTHER WORD TO THIS
REGISTER?
YES
CHANGE 8 BITS ONLY
NO
WRITE A WORD TO ANOTHER REGISTER
Figure 24. Data Writes
SELECT DATA SOURCES***
NO
FSELECT/PSEL PINS BEING USED?
YES
SELSRC = 0
SELSRC = 1
SET PINS
SET FSELECT
SET PSEL0
SET PSEL1
FREQUENCY/PHASE REGISTER WRITE
SET FSELECT
SET PSEL0
SET PSEL1
Figure 25. Selecting Data Sources
–12–
REV. A
Share Link: 