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AD9174 Datasheet(PDF) 46 Page - Analog Devices

Part # AD9174
Description  Dual, 16-Bit, 12.6 GSPS RF DAC and Direct Digital Synthesizer
PDF  164 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9174 Datasheet(HTML) 46 Page - Analog Devices

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AD9174
Data Sheet
Rev. A | Page 46 of 164
TRANSPORT LAYER
The transport layer receives the descrambled JESD204B frames
and converts them to DAC samples based on the programmed
JESD204B parameters shown in Table 25. The device parameters
are defined in Table 26.
Table 25. JESD204B Transport Layer Parameters
Parameter
Description
F
Number of octets per frame per lane: 1, 2, 3, 4 or 8.
K
Number of frames per multiframe: K = 32.
L
Number of lanes per converter device (per link), as
follows: 1, 2, 3, 4 or 8.
M
Number of converters per device (per link), as follows:
For real data modes, M is the number of real data
converters (if total interpolation is 1×). For complex
data modes, M is the number of complex data
subchannels, I or Q.
S
Number of samples per converter, per frame: 1, 2,
4 or 8.
Table 26. JESD204B Device Parameters
Parameter
Description
CF
Number of control words per device clock per link.
Not supported, must be 0.
CS
Number of control bits per conversion sample. Not
supported, must be 0.
HD
High density user data format. This parameter is
always set to 1.
N
Converter resolution.
N' (or NP)
Total number of bits per sample.
Certain combinations of these parameters are supported by the
AD9174. See Table 28 and Table 29 for a list of supported single-
link and dual-link modes, respectively. Table 28 and Table 29
lists the JESD204B parameters for each of the modes. Table 27 lists
JESD204B parameters that have fixed values.
Table 27. JESD204B Parameters with Fixed Values
Parameter
Value
K
32
CF
0
HD
1
CS
0
Table 28. Single-Link JESD204B Operating Modes
Parameter
Single-Link JESD204B Modes
0
1
2
3
4
5
6
7
8
9
10
11
12
18
19
20
21
22
L (Lane Count)
1
2
3
2
4
1
2
1
4
4
8
8
8
4
4
8
8
4
M (Converter Count)
2
4
6
2
4
2
4
4
2
2
2
2
2
1
1
1
1
2
F (Octets per Frame per Lane)
4
4
4
2
2
3
3
8
1
2
1
2
3
1
2
1
2
3
S (Samples per Converter per Frame)
1
1
1
1
1
1
1
1
1
2
2
4
8
2
4
4
8
4
NP (Total Number of Bits per Sample)
16
16
16
16
16
12
12
16
16
16
16
16
12
16
16
16
16
12
N (Converter Resolution)
16
16
16
16
16
12
12
16
16
16
16
16
12
16
16
16
16
12
Table 29. Dual-Link JESD204B Operating Modes
Parameter
Dual-Link JESD204B Modes
0
1
2
3
4
5
6
7
8
9
18
19
22
L (Lane Count)
1
2
3
2
4
1
2
1
4
4
4
4
4
M (Converter Count)
2
4
6
2
4
2
4
4
2
2
1
1
2
F (Octets per Frame per Lane)
4
4
4
2
2
3
3
8
1
2
1
2
3
S (Samples per Converter per Frame)
1
1
1
1
1
1
1
1
1
2
2
4
4
NP (Total number of Bits per Sample)
16
16
16
16
16
12
12
16
16
16
16
16
12
N (Converter Resolution)
16
16
16
16
16
12
12
16
16
16
16
16
12



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