AD9717-EBZ Analog Devices Inc, AD9717-EBZ Datasheet - Page 40

• Manufacturer Part Number: AD9717-EBZ
• Description: BOARD EVAL FOR AD9717
• Manufacturer: Analog Devices Inc
• Series: TxDAC®r

Specifications of AD9717-EBZ

• Number Of Dac's: 2
• Number Of Bits: 14
• Outputs And Type: 2, Differential
• Sampling Rate (per Second): 125M
• Data Interface: Serial
• Dac Type: Current
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: AD9717
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD9714/AD9715/AD9716/AD9717
DIGITAL INTERFACE OPERATION
Digital data for the I and Q DACs is supplied over a single
parallel bus (DB[n:0), where n is 7 for the AD9714, 9 for
the AD9715, 11 for the AD9716, and 13 for the AD9717)
accompanied by a qualifying clock (DCLKIO). The I and Q
data are provided to the chip in an interleaved double data
rate (DDR) format. The maximum guaranteed data rate is
250 MSPS with a 125 MHz clock. The order of data pairing
and the sampling edge selection is user programmable using
the IFIRST and IRISING data control bits, resulting in four
possible timing diagrams. These are shown in Figure 89,
NOTES:
1. DB[n:0], WHERE n IS 7 FOR THE AD9714, 9 FOR THE AD9715, 11 FOR THE
NOTES:
1. DB[n:0], WHERE n IS 7 FOR THE AD9714, 9 FOR THE AD9715, 11 FOR THE
DCLKIO
Q DATA
DCLKIO
Q DATA
DB[n:0]
DB[n:0]
I DATA
I DATA
AD9716, AND 13 FOR THE AD9717.
AD9716, AND 13 FOR THE AD9717.
90, Figure 91, and Figure 92.
Z
Z
Figure 89. Timing Diagram with IFIRST = 0, IRISING = 0
Figure 90. Timing Diagram with IFIRST = 0, IRISING = 1
A
A
B
B
Y
X
Z
Y
C
C
D
D
B
A
A
Z
E
E
F
F
D
C
C
B
G
G
H
H
D
E
E
F
Rev. A | Page 40 of 80
Ideally, the rising and falling edges of the clock fall in the center
of the keep-in-window formed by the setup and hold times, t
and t
timing diagram is shown in Figure 93.
In addition to the different timing modes listed in Table 2, the
input data can also be presented to the device in either unsigned
binary or twos complement format. The format type is chosen
via the TWOS data control bit.
DCLKIO
Q DATA
NOTES:
1. DB[n:0], WHERE n IS 7 FOR THE AD9714, 9 FOR THE AD9715, 11 FOR THE
NOTES:
1. DB[n:0], WHERE n IS 7 FOR THE AD9714, 9 FOR THE AD9715, 11 FOR THE
DCLKIO
Q DATA
DB[n:0]
DB[n:0]
I DATA
I DATA
AD9716, AND 13 FOR THE AD9717.
AD9716, AND 13 FOR THE AD9717.
H
. Refer to Table 2 for setup and hold times. A detailed
Z
Z
DCLKIO
NOTES:
1. DB[n:0], WHERE n IS 7 FOR THE AD9714, 9 FOR THE
DB[n:0]
Figure 91. Timing Diagram with IFIRST = 1, IRISING = 0
Figure 92. Timing Diagram with IFIRST = 1, IRISING = 1
Figure 93. Setup and Hold Times for All Input Modes
AD9715, 11 FOR THE AD9716, AND 13 FOR THE AD9717.
A
A
B
B
A
Z
Y
Z
t
S
t
C
C
H
D
D
B
C
B
A
t
S
t
H
E
E
F
F
D
C
D
E
G
G
H
H
G
E
F
F
S