參數(shù)資料
型號(hào)： AD9912ABCPZ-REEL7
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 30/40頁(yè)
文件大?。?/td> 0K
描述： IC DDS 1GSPS DAC 14BIT 64LFCSP
產(chǎn)品培訓(xùn)模塊： 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
標(biāo)準(zhǔn)包裝： 750
分辨率（位）： 14 b
主 fclk： 1GHz
調(diào)節(jié)字寬（位）： 48 b
電源電壓： 1.8V, 3.3V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 64-VFQFN 裸露焊盤，CSP
供應(yīng)商設(shè)備封裝： 64-LFCSP-VQ（9x9）
包裝： 帶卷 (TR)
AD9912
Rev. F | Page 36 of 40
Register 0x01A9—FTW0 (Frequency Tuning Word) (Continued)
Table 27.
Bits
Bit Name
Description
[31:24]
FTW0
These registers contain the FTW (frequency tuning word) for the DDS. The FTW determines the ratio
of the AD9912 output frequency to its DAC system clock. Register 0x01A6 is the least significant
byte of the FTW. Note that the power-up default is defined by start-up Pin S1 to Pin S4. Updates to
the FTW results in an instantaneous frequency jump but no phase discontinuity.
Register 0x01AA—FTW0 (Frequency Tuning Word) (Continued)
Table 28.
Bits
Bit Name
Description
[39:32]
FTW0
These registers contain the FTW (frequency tuning word) for the DDS. The FTW determines the ratio
of the AD9912 output frequency to its DAC system clock. Register 0x01A6 is the least significant
byte of the FTW. Note that the power-up default is defined by start-up Pin S1 to Pin S4. Updates to
the FTW results in an instantaneous frequency jump but no phase discontinuity.
Register 0x01AB—FTW0 (Frequency Tuning Word) (Continued)
Table 29.
Bits
Bit Name
Description
[47:40]
FTW0
These registers contain the FTW (frequency tuning word) for the DDS. The FTW determines the ratio
of the AD9912 output frequency to its DAC system clock. Register 0x01A6 is the least significant
byte of the FTW. Note that the power-up default is defined by start-up Pin S1 to Pin S4. Updates to
the FTW results in an instantaneous frequency jump but no phase discontinuity.
Register 0x01AC—Phase
Table 30.
Bits
Bit Name
Description
[7:0]
DDS phase word
Allows the user to vary the phase of the DDS output. See the Direct Digital Synthesizer section.
Register 0x01AC is the least significant byte of the phase offset word (POW). Note that a momentary
phase discontinuity may occur as the phase passes through 45° intervals.
Register 0x01AD—Phase (Continued)
Table 31.
Bits
Bit Name
Description
[13:8]
DDS phase word
Allows the user to vary the phase of the DDS output. See the Direct Digital Synthesizer section.
Register 0x01AC is the least significant byte of the phase offset word (POW). Note that a momentary
phase discontinuity may occur as the phase passes through 45° intervals.
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