參數(shù)資料
型號: AD9779BSVZ
廠商: Analog Devices Inc
文件頁數(shù): 40/56頁
文件大?。?/td> 0K
描述: IC DAC 16BIT DUAL 1GSPS 100TQFP
產(chǎn)品培訓(xùn)模塊: Data Converter Fundamentals
DAC Architectures
標(biāo)準(zhǔn)包裝: 1
位數(shù): 16
數(shù)據(jù)接口: 串行
轉(zhuǎn)換器數(shù)目: 2
電壓電源: 模擬和數(shù)字
功率耗散(最大): 300mW
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: 托盤
輸出數(shù)目和類型: 4 電流,單極
采樣率(每秒): 1G
AD9776/AD9778/AD9779
Rev. A | Page 45 of 56
In addition to this divisor function, DATACLK can be divided
by up to an additional factor of 4, according to the state of the
DATACLK divide register (Register 0x03, Bits<5:4>). For more
details, see Table 22).
Table 22. Extra DATACLK Divisor Ratio
Register 0x03, Bits<5:4>
Divider Ratio
00
1
01
2
10
4
11
1
The maximum divisor resulting from the combination of the
values in Table 21, and the DATACLK divide register is 32.
Manual Input Timing Correction
Correction of input timing can be achieved manually. The
correction function is controlled by Register 0x03, Bits<7:6>.
The function is programmed as shown in Table 23.
Table 23. Input Timing Correction Mode
Register 0x03, Bits<7:6>
Function
00
Error check disabled
01
Reserved
10
Reserved
11
Reserved
Necessary corrections can be made by adjusting DATACLK
delay and the DATACLK invert bit (Register 2, Bit 2).
DATACLK delay can then be swept to find the range over which
the timing is valid. The final value for data delay should be the
value that corresponds to the middle of the valid timing range.
If a valid timing range is not found during this sweep, the user
should invert the DATACLK invert bit and repeat the process.
Multiple DAC Synchronization
The AD9779 has programmable features that allow the CMOS
digital data bus inputs and internal filters on multiple devices to
be synchronized. This means that the DATACLK output signal
on one AD9779 can be used to register the output data for a data
bus delivering data to multiple AD9779s. The details of this opera-
tion are given in the Analog Devices Application Note AN-822.
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