ADV7341BSTZ Analog Devices Inc, ADV7341BSTZ Datasheet - Page 74

• Manufacturer Part Number: ADV7341BSTZ
• Manufacturer: Analog Devices Inc

Specifications of ADV7341BSTZ

• Number Of Dac's: 6
• Adc/dac Resolution: 12b
• Screening Level: Industrial
• Package Type: LQFP
• Pin Count: 64
• Lead Free Status / RoHS Status: Compliant

ADV7340/ADV7341
OUTPUT
DAC
–10
–20
–30
–40
–50
–60
–70
–80
–90
–10
–20
–30
–40
–50
–60
–70
–80
300Ω
0
1M
0
1M
Figure 88. Example of Output Filter for HD, 4× Oversampling
GROUP DELAY (Seconds)
GROUP DELAY (Seconds)
3
4
Figure 89. Output Filter Plot for SD, 16× Oversampling
Figure 90. Output Filter Plot for ED, 8× Oversampling
CIRCUIT FREQUENCY RESPONSE
1
CIRCUIT FREQUENCY RESPONSE
10M
75Ω
10M
FREQUENCY (Hz)
FREQUENCY (Hz)
390nH
33pF
33pF
100M
100M
75Ω
MAGNITUDE (dB)
MAGNITUDE (dB)
PHASE (Degrees)
500Ω
3
4
(Degrees)
PHASE
500Ω
1
1G
1G
480
400
320
240
160
80
0
–80
–160
–240
OUTPUT
0
–30
–60
–90
–120
–150
–180
–210
–240
BNC
18n
16n
14n
12n
10n
8n
6n
4n
2n
0
24n
21n
18n
15n
12n
9n
6n
3n
0
Rev. A | Page 74 of 108
PRINTED CIRCUIT BOARD (PCB) LAYOUT
The ADV7340/ADV7341 are highly integrated circuits containing
both precision analog and high speed digital circuitry. They are
designed to minimize interference effects on the integrity of the
analog circuitry by the high speed digital circuitry. It is
imperative that these same design and layout techniques be
applied to the system-level design so that optimal performance
is achieved.
The layout should be optimized for lowest noise on the
ADV7340/ADV7341 power and ground planes by shielding the
digital inputs and providing good power supply decoupling.
It is recommended to use a 4-layer printed circuit board with
ground and power planes separating the signal trace layer and
the solder side layer.
Component Placement
Component placement should be carefully considered to separate
noisy circuits, such as clock signals and high speed digital circuitry,
from analog circuitry. The external loop filter components and
components connected to the COMP, V
be placed as close as possible to, and on the same side of the PCB
as, the ADV7340/ ADV7341.
Adding vias to the PCB to get the components closer to the
ADV7340/ADV7341 is not recommended. It is recommended
to place the ADV7340/ADV7341 as close as possible to the
output connector, with the DAC output traces as short as
possible. The termination resistors on the DAC output traces
should be placed as close as possible to and on the same side of
the PCB as the ADV7340/ADV7341. The termination resistors
should overlay the PCB ground plane.
–10
–20
–30
–40
–50
0
1
Figure 91. Output Filter Plot for HD, 4× Oversampling
GROUP DELAY (Seconds)
CIRCUIT FREQUENCY RESPONSE
FREQUENCY (MHz)
10
MAGNITUDE (dB)
REF
, and R
100
(Degrees)
PHASE
SETx
pins should
200
120
40
–40
–120
–200