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參數資料
| 型號： | AD9958 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | 2-Channel 500 MSPS DDS with 10-Bit DACs |
| 中文描述： | 雙通道500 MSPS的DDS的10位DAC |
| 文件頁數： | 28/40頁 |
| 文件大小： | 1051K |
| 代理商： | AD9958 |
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AD9958
I/O_UPDATE, SYNC_CLK, AND SYSTEM CLOCK
RELATIONSHIPS
I/O_UPDATE and SYNC_CLK are used together to transfer
data from the serial I/O buffer to the active registers in the
device. Data in the buffer is inactive.
Rev. 0 | Page 28 of 40
The I/O UPDATE is essentially over sampled by the
SYNC_CLK. Therefore, I/O_UPDATE must have a
minimum pulse width greater than one SYNC_CLK period.
The timing diagram shown in Figure 39 depicts when data in
the buffer is transferred to the active registers.
SYNC_CLK is a rising edge active signal. It is derived from
the system clock and a divide-by-4 frequency divider. The
SYNC_CLK is externally provided, which can be used to
synchronize external hardware to the AD9958’s internal clocks.
I/O_UPDATE initiates the start of a buffer transfer. It can be
sent synchronously or asynchronous relative to the SYNC_CLK.
If the set-up time between these signals is met, then constant
latency (pipeline) to the DAC output exists. For example, if
repetitive changes to phase offset via the SPI port are desired,
the latency of those changes to the DAC output is constant,
otherwise a time uncertainty of 1 SYNC_CLK period is present.
SYNC_CLK
SYSCLK
A
B
DATA 2
DATA 3
DATA 1
DATA IN
REGISTERS
DATA IN
I/O BUFFERS
DATA 1
DATA 2
DATA 3
I/O UPDATE
THE DEVICE REGISTERS AN I/O UPDATE AT POINT A. THE DATA IS TRANSFERRED FROM THE ASYNCHRONOUSLY LOADED I/O BUFFERS AT POINT B.
0
Figure 39.
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相關代理商/技術參數 |
參數描述 |
|---|---|
| AD9958 PCB | 制造商:Analog Devices 功能描述:EVAL BOARD ((NS)) |
| AD9958/PCB | 制造商:Analog Devices 功能描述:Evaluation Board For 2-Channel 500 MSPS DDS With 10-Bit DACs 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Analog Devices 功能描述:IC 10-BIT DAC DDS |
| AD9958/PCBZ | 功能描述:BOARD EVALUATION FOR AD9958 RoHS:是 類別:編程器，開發系統 >> 評估演示板和套件 系列:AgileRF™ 標準包裝:1 系列:PSoC® 主要目的:電源管理，熱管理 嵌入式:- 已用 IC / 零件:- 主要屬性:- 次要屬性:- 已供物品:板，CD，電源 |
| AD9958/PCBZ | 制造商:Analog Devices 功能描述:EVAL BOARD, AD9958 DIRECT DIGITAL SYNTHE |
| AD9958_08 | 制造商:AD 制造商全稱:Analog Devices 功能描述:2-Channel, 500 MSPS DDS with 10-Bit DACs |
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