ADV7342BSTZ Analog Devices Inc, ADV7342BSTZ Datasheet - Page 71

• Manufacturer Part Number: ADV7342BSTZ
• Manufacturer: Analog Devices Inc

Specifications of ADV7342BSTZ

• Number Of Dac's: 6
• Adc/dac Resolution: 11b
• Screening Level: Industrial
• Package Type: LQFP
• Pin Count: 64
• Lead Free Status / RoHS Status: Compliant

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 71 of 104
PRINTED CIRCUIT BOARD (PCB) LAYOUT
The ADV7342/ADV7343 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
ADV7342/ADV7343 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
possible to and on the same side of the PCB as the ADV7342/
ADV7343. Adding vias to the PCB to get the components closer
to the ADV7342/ADV7343 is not recommended.
It is recommended that the ADV7342/ADV7343 be placed 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 ADV7342/ADV7343. 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
REF
GROUP DELAY (Seconds)
CIRCUIT FREQUENCY RESPONSE
, and R
FREQUENCY (MHz)
SETx
10
MAGNITUDE (dB)
pins should be placed as close as
ADV7342/ADV7343
100
(Degrees)
PHASE
200
120
40
–40
–120
–200