參數(shù)資料
型號(hào): AD1939YSTZRL
廠商: Analog Devices Inc
文件頁數(shù): 22/32頁
文件大?。?/td> 0K
描述: IC CODEC 24BIT ADC/DAC 64-LQFP
標(biāo)準(zhǔn)包裝: 1,500
類型: 通用
數(shù)據(jù)接口: 串行
分辨率(位): 24 b
ADC / DAC 數(shù)量: 4 / 8
三角積分調(diào)變:
S/N 比,標(biāo)準(zhǔn) ADC / DAC (db): 94 / 94
動(dòng)態(tài)范圍,標(biāo)準(zhǔn) ADC / DAC (db): 105 / 110
電壓 - 電源,模擬: 3 V ~ 3.6 V
電壓 - 電源,數(shù)字: 3 V ~ 3.6 V
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
供應(yīng)商設(shè)備封裝: 64-LQFP(10x10)
包裝: 帶卷 (TR)
Data Sheet
AD1939
Rev. E | Page 29 of 32
ADDITIONAL MODES
The AD1939 offers several additional modes for board level
design enhancements. To reduce the EMI in board level design,
serial data can be transmitted without an explicit BCLK. See
Figure 27 for an example of a DAC TDM data transmission
mode that does not require high speed DBCLK. This configura-
tion is applicable when the AD1939 master clock is generated
by the PLL with the DLRCLK as the PLL reference frequency.
To relax the requirement for the setup time of the AD1939 in
cases of high speed TDM data transmission, the AD1939 can
latch in the data using the falling edge of DBCLK. This effec-
tively dedicates the entire BCLK period to the setup time. This
mode is useful in cases where the source has a large delay time
in the serial data driver. Figure 28 shows this pipeline mode of
data transmission.
Both the BCLK-less and pipeline modes are available on the
ADC serial data port.
DLRCLK
INTERNAL
DBCLK
DSDATAx
DLRCLK
INTERNAL
DBCLK
TDM-DSDATAx
32 BITS
06
07
1-
0
59
Figure 27. Serial DAC Data Transmission in TDM Format Without DBCLK
(Applicable Only If PLL Locks to DLRCLK, This Mode Is Also Available in the ADC Serial Data Port)
DLRCLK
DBCLK
DSDATAx
DATA MUST BE VALID
AT THIS BCLK EDGE
MSB
0
60
71
-06
0
Figure 28. I2S Pipeline Mode in DAC Serial Data Transmission
(Applicable in Stereo and TDM, Useful for High Frequency TDM Transmission,
This Mode Is Also Available in the ADC Serial Data Port)
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