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AD9142 датащи(PDF) 21 Page - Analog Devices

номер детали AD9142
подробное описание детали  Dual, 16-Bit, 1600 MSPS, TxDAC Digital-to-Analog Converter
PDF  65 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD9142 датащи(HTML) 21 Page - Analog Devices

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Data Sheet
AD9142
Rev. 0 | Page 21 of 64
LVDS Input Level Requirements
There are two types of LVDS receivers in the AD9142. The
16-bit data bus and the frame input share the same LVDS
receiver design. The DCI uses a different LVDS design. The
main difference between the two LVDS receivers is the required
input differential swing level. The data bus and frame receiver
require a minimum of ±100 mV swing at the input. The DCI
receiver requires a minimum of ±225 mV swing at its input.
Figure 35 shows the LVDS input configuration and the required
swing levels. Because the DCI is typically generated from the
same bank as the data in the data source, it is recommended
that the output swing of the LVDS driver be larger than the
required DCI input level, thus meeting both input data and DCI
requirements.
Figure 35. Data Interface Voltage Swing Requirements
1.32V
+225mV
–225mV
0V
1.1V
DCIP
DCI
DCIN
AD9142 DCI INPUT LVDS LEVEL
1.25V
+100mV
–100mV
0V
1.15V
DnP
Dn
DnN
AD9142 DATA AND
FRAME INPUT LVDS LEVEL
DnN
DnP
Dn
AD9142 LVDS INPUT CONFIGURATION
+
–
+
–
DCIN
DCIP
DCI
GND
GND
AD9142
TO INTERNAL
DIGITAL
TO INTERNAL
DIGITAL
VCM = (VINP + VINN)/2 = 1.2V
100Ω
100Ω
DATA
RECEIVER
DCI
RECEIVER



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