参数资料
型号: AD9838ACPZ-RL7
厂商: Analog Devices Inc
文件页数: 16/32页
文件大小: 0K
描述: IC DDS 16MHZ LOW PWR 20LFCSP
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: 1,500
分辨率(位): 10 b
主 fclk: 5MHz
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: 20-WFQFN 裸露焊盘,CSP
供应商设备封装: 20-LFCSP-WQ(4x4)
包装: 带卷 (TR)
AD9838
Rev. A | Page 23 of 32
NO
YES
DATA WRITE
NO
YES
NO
YES
NO
YES
WRITE A FULL 28-BIT WORD
TO A FREQUENCY REGISTER?
(CONTROL REGISTER WRITE)
B28 (D13) = 1
WRITE TWO CONSECUTIVE
16-BIT WORDS
(SEE TABLE 12 FOR EXAMPLE)
WRITE ANOTHER FULL
28-BIT WORD TO A
FREQUENCY REGISTER?
WRITE 14 MSBs OR LSBs
TO A FREQUENCY REGISTER?
(CONTROL REGISTER WRITE)
B28 (D13) = 0
HLB (D12) = 0/1
WRITE A 16-BIT WORD
(SEE TABLE 13 AND TABLE 14
FOR EXAMPLES)
WRITE 14 MSBs OR LSBs
TO A
FREQUENCY REGISTER?
WRITE TO PHASE
REGISTER?
D15, D14 = 11
D13 = 0/1 (CHOOSE THE
PHASE REGISTER)
D12 = X
D11 ... D0 = PHASE DATA
(16-BIT WRITE)
WRITE TO ANOTHER
PHASE REGISTER?
09
07
7-
0
30
Figure 26. Flowchart for Data Writes
SELECT DATA SOURCES
YES
NO
FSELECT AND PSELECT
PINS BEING USED?
(CONTROL REGISTER WRITE)
PIN/SW = 0
SET FSEL BIT
SET PSEL BIT
SET FSELECT AND
PSELECT PINS
(CONTROL REGISTER WRITE)
PIN/SW = 1
09
07
7-
0
31
Figure 27. Flowchart for Selecting Data Sources
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