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參數(shù)資料
型號: AD9910BSVZ-REEL
廠商: Analog Devices Inc
文件頁數(shù): 35/64頁
文件大?。?/td> 0K
描述: IC DDS 1GSPS 14BIT PAR 100TQFP
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
設(shè)計資源: Synchronizing Multiple AD9910 1 GSPS Direct Digital Synthesizers (CN0121)
標(biāo)準(zhǔn)包裝: 1,000
分辨率(位): 14 b
主 fclk: 1GHz
調(diào)節(jié)字寬(位): 32 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: 100-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝: 100-TQFP-EP(14x14)
包裝: 帶卷 (TR)
AD9910
Data Sheet
Rev. D | Page 40 of 64
WAVEFORM START ADDRESS
WAVEFORM END ADDRESS
1
Δt
RAM ADRESS
RAM_SWP_OVER
I/O_UPDATE
M DDS CLOCK CYCLES
1
2
3
06479-
028
Figure 47. Continuous Bidirectional Ramp Timing Diagram
A change in state of the PROFILE pins aborts the current wave-
form, and the newly selected RAM profile is used to initiate a
new waveform.
The RAM_SWP_OVR pin switches to Logic 1 when the state
machine reaches the waveform end address, then returns to
Logic 0 at the waveform start address, toggling each time one
of these addresses is reached.
A graphic representation of the continuous bidirectional ramp
mode is shown in Figure 47. The circled numbers indicate specific
events as follows:
Event 1—An I/O update or profile change has activated the RAM
continuous bidirectional ramp mode. The state machine initializes
to the waveform start address. The RAM_SWP_OVR pin resets to
Logic 0. The state machine begins incrementing through the
specified address range.
Event 2—The state machine reaches the waveform end address.
The RAM_SWP_OVR pin toggles to Logic 1.
Event 3—The state machine reaches the waveform start address.
The RAM_SWP_OVR pin toggles to Logic 0.
The continuous bidirectional ramp continues indefinitely until
the mode is changed.
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