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參數(shù)資料
| 型號： | AD9954YSVZ |
| 廠商： | Analog Devices Inc |
| 文件頁數(shù)： | 11/40頁 |
| 文件大小： | 0K |
| 描述： | IC DDS DAC 14BIT 1.8V 48-TQFP |
| 產(chǎn)品培訓模塊： | 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 |
| 標準包裝： | 1 |
| 分辨率（位）： | 14 b |
| 主 fclk： | 400MHz |
| 調(diào)節(jié)字寬（位）： | 32 b |
| 電源電壓： | 1.71 V ~ 1.96 V |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 48-TQFP 裸露焊盤 |
| 供應商設備封裝： | 48-TQFP 裸露焊盤（7x7） |
| 包裝： | 托盤 |
| 產(chǎn)品目錄頁面： | 552 (CN2011-ZH PDF) |
| 配用： | AD9954/PCBZ-ND - BOARD EVAL FOR 9954 |
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AD9954
Rev. B | Page 19 of 40
03
37
4-
00
3
FTW0
SINGLE-TONE
MODE
LINEAR SWEEP MODE
AT POINT A: LOAD RISING RAMP RATE REGISTER, APPLY RISING DFTW.
AT POINT B: LOAD FALLING RAMP RATE REGISTER, APPLY FALLING DFTW.
PS<0> = 1
PS<0>= 0
PS<0> =0
TIME
FTW1
A
B
fOUT
Figure 21. Linear Sweep Frequency Plan
03
37
4-
00
4
FTW0
SINGLE-TONE
MODE
LINEAR SWEEP MODE ENABLE–NO DWELL BIT SET
FTW1
AA
A
B
BB
fOUT
TIME
PS<0> = 1 PS<0> = 0
PS<0> = 0
PS<0> = 1
PS<0> = 0
Figure 22. Linear Sweep Using No-Dwell Frequency Plan
Linear Sweep No-Dwell Feature
See CFR1<2> in the register maps (see Table 12 and Table 13)
for general details of the no-dwell mode. Figure 22 depicts the
linear sweep mode operation when the linear sweep no-dwell
bit is set. The Label A points indicate where a rising edge on
PS0 is detected; the Label B points indicate where the AD9954
has determined fOUT has reached the terminal frequency and
automatically returns to the starting frequency. Note that in this
mode, only sweeps from FTW0 to FTW1 using the positive
linear sweep control word are supported. Toggling PS0 from 1
to 0 neither initiates a falling sweep when the no-dwell bit is set,
nor interrupts a positive sweep already underway.
Resetting the Ramp Rate Timer
The ramp timer can be reset before reaching a count of 1 by
three methods.
Method one is by changing the PS0 input pin. When the PS0
input pin toggles from 0 to 1, the RSRRW value is loaded into
the ramp rate timer, which then proceeds to countdown as
normal. When the PS0 input pin toggles from 0 to 1, the falling
sweep ramp rate word (FSRRW) value is loaded into the ramp
rate timer, which then proceeds to countdown as normal.
The second method uses the LOAD SRR @ I/O UD bit
(CFR1<15>), see Table 12 for details.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| AD9954YSVZ | 制造商:Analog Devices 功能描述:IC DDS 400MSPS SMD 9954 TQFP48 |
| AD9954YSVZ1 | 制造商:AD 制造商全稱:Analog Devices 功能描述:400 MSPS, 14-Bit, 1.8 V CMOS, Direct Digital Synthesizer |
| AD9954YSVZ-REEL7 | 功能描述:IC DDS DAC 14BIT 1.8V 48TQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 直接數(shù)字合成 (DDS) 系列:- 產(chǎn)品變化通告:Product Discontinuance 27/Oct/2011 標準包裝:2,500 系列:- 分辨率（位）:10 b 主 fclk:25MHz 調(diào)節(jié)字寬（位）:32 b 電源電壓:2.97 V ~ 5.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:帶卷 (TR) |
| AD9954YSVZ-REEL71 | 制造商:AD 制造商全稱:Analog Devices 功能描述:400 MSPS, 14-Bit, 1.8 V CMOS, Direct Digital Synthesizer |
| AD9955KS6 | 制造商:AD 功能描述:* |
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