参数资料
型号: AD9837ACPZ-RL
厂商: Analog Devices Inc
文件页数: 9/28页
文件大小: 0K
描述: IC WAVEFORM GEN PROG 10LFCSP
产品培训模块: Direct Digital Synthesis Tutorial Series (1 of 7): Introduction
Direct Digital Synthesizer Tutorial Series (7 of 7): DDS in Action
Direct Digital Synthesis Tutorial Series (3 of 7): Angle to Amplitude Converter
Direct Digital Synthesis Tutorial Series (6 of 7): SINC Envelope Correction
Direct Digital Synthesis Tutorial Series (4 of 7): Digital-to-Analog Converter
Direct Digital Synthesis Tutorial Series (2 of 7): The Accumulator
标准包装: 5,000
分辨率(位): 10 b
主 fclk: 5MHz
调节字宽(位): 28 b
电源电压: 2.3 V ~ 5.5 V
工作温度: -40°C ~ 125°C
安装类型: 表面贴装
封装/外壳: 10-WFDFN 裸露焊盘,CSP
供应商设备封装: 10-LFCSP-WD(3x3)
包装: 带卷 (TR)
Data Sheet
AD9837
Rev. A | Page 17 of 28
DATA WRITE
(SEE FIGURE 24)
SELECT DATA
SOURCES
WAIT 7/8 MCLK
CYCLES
CHANGE PHASE?
CHANGE FREQUENCY?
CHANGE DAC OUTPUT
FROM SIN TO TRIANGLE?
CHANGE OUTPUT TO
A DIGITAL SIGNAL?
CHANGE PHASE
REGISTER?
CHANGE FREQUENCY
REGISTER?
CONTROL REGISTER
WRITE
(SEE TABLE 7)
INITIALIZATION
(SEE FIGURE 23)
NO
YES
NO
YES
NO
YES
09070-
026
CHANGE
FSEL BIT?
CHANGE
PSEL BIT?
Figure 22. Flowchart for AD9837 Initialization and Operation
INITIALIZATION
APPLY RESET
(CONTROL REGISTER WRITE)
RESET = 1
WRITE TO FREQUENCY AND PHASE REGISTERS
FREQ0 REG =
fOUT0/fMCLK × 228
FREQ1 REG =
fOUT1/fMCLK × 228
PHASE0 AND PHASE1 REG = (PHASESHIFT × 212
)/2π
(SEE FIGURE 24)
SET RESET = 0
SELECT FREQUENCY REGISTERS
SELECT PHASE REGISTERS
(CONTROL REGISTER WRITE)
RESET BIT = 0
FSEL = SELECTED FREQUENCY REGISTER
PSEL = SELECTED PHASE REGISTER
09070-
027
Figure 23. Flowchart for Initialization
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