參數(shù)資料
型號(hào): AD9833
廠商: Analog Devices, Inc.
英文描述: +2.5 V to +5.5 V, 25 MHz Low Power CMOS Complete DDS
中文描述: 2.5 V至5.5 V,25 MHz低功耗CMOS完整的DDS
文件頁數(shù): 14/18頁
文件大小: 210K
代理商: AD9833
AD9833
14
REV PrG
PRELIMINARY TECHNICAL DATA
Figure 7. Initialisation
Figure 6. Flow Chart for AD9833 Initialisation and Operation
WAIT 7/8 MCLK
CYCLES
VOUT = VREF * 18 * RLOAD/RSET * (1+ (SIN(2
p
(FREQREG * FMCLK * t/228 + PHASEREG/212)))
DAC OUTPUT
DATA WRITE
See Figure 8 below
SELECT DATA
SOURCES
INITIALISATION
See Figure 7 below
CHANGE PHASE
CHANGE FREQUENCY
CHANGE
FSELECT
CHANGE FREQ
REGISTER
CHANGE DAC OUTPUT
FROM SIN TO RAMP
CONTROL
REGISTER
WRITE
(see Table 11)
CHANGE OUTPUT TO
A DIGITAL SIGNAL
CHANGE
PSELECT
CHANGE PHASE
REGISTER
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
NO
YES
INITIALISATION
APPLY RESET
WRITE TO FREQUENCY AND PHASE REGISTERS
FREQ0 REG = FOUT0 / fMCLK * 228
FREQ1 REG = FOUT1 / fMCLK * 228
PHASE 0 & PHASE1 REG = (PhaseShift * 212) / 2
p
(See Figure 8)
SET RESET = 0
SELECT FREQUENCY REGISTERS
SELECT PHASE REGISTERS
(CONTROL REGISTER WRITE)
RESET bit = 0
FSELECT = Selected Freq Register
PSELECT = Selected Phase Register
(CONTROL REGISTER WRITE)
RESET = 1
相關(guān)PDF資料
PDF描述
AD9833BRM +2.5 V to +5.5 V, 25 MHz Low Power CMOS Complete DDS
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