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AD9782 Datasheet(PDF) 39 Page - Analog Devices

Part # AD9782
Description  12-Bit, 200 MSPS/500 MSPS TxDAC with 2 x /4 x /8 x Interpolation and Signal Processing
PDF  52 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD9782 Datasheet(HTML) 39 Page - Analog Devices

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Preliminary Technical Data
AD9782
Rev. PrC | Page 39 of 52
DAC
CLOCK
STATE
MACHINE
STATE MACHINE
CHANNEL DATA
CYCLE CLOCK
RATE CLOCK
MODULATOR
COEFFICIENT
MODADJ
000
000
10
–1
010
–1
010
–1
010
–1
0
–1
0
10
–1
01
0
–1
0
1
0
–1
01
0
01
2345
6789
10
11
12
13
14
15
01
23456
789
10
11
12
13
14
15
Figure 69. Synchronous Serial Modulator Phase Alignment
DATADJ[3:0]
DAC CLOCK
RECEIVED CHANNEL
DATA RATE CLOCK
LOCAL CHANNEL
DATA RATE CLOCK
0000
0001
1111
–1
+1
Figure 70. Local Channel Data Rate Clock Synchronized with Offset
1
fs/2
STATE
2
3
4
5
6
7
8
9
10
11
12
13
4
15
1
0
0
1
DECODE
0
0
0
0
0
–1
0
0
0
0
0
1
1/ 2
–1/ 2
–1/ 2
–1/ 2
fs/4
1
2
3
0
fs/8
1234567
0
Figure 71. Digital Modulator State Machine Decode
MODADJ[2:0]
DAC CLOCK
STATE MACHINE
CYCLE CLOCK
000
101
010
STATE
MACHINE
MODULATOR
COEFFICIENT
–1
0
1
0
–1
0
0
–1
0
1
0
–1
0
14
15
0123
15
01
15
01
2
Figure 72. Local Modulator Coefficient Synchronized with Offset



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