ADV7330KST Analog Devices Inc, ADV7330KST Datasheet - Page 50

• Manufacturer Part Number: ADV7330KST
• Manufacturer: Analog Devices Inc

Specifications of ADV7330KST

• Operating Supply Voltage (typ): 2.5V
• Operating Temp Range: 0C to 70C
• Operating Temperature Classification: Commercial
• Package Type: LQFP
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / Rohs Status: Compliant

ADV7330
BOARD DESIGN AND LAYOUT CONSIDERATIONS
DAC Termination and Layout Considerations
The ADV7330 contains an on-board voltage reference. The V
pin is normally terminated to V
when the internal V
be used with an external V
The RSET resistors connected between the R
are used to control the full-scale output current and therefore
the DAC voltage output levels. For full-scale output, R
have a value of 3040 Ω. The R
R
VIDEO OUTPUT BUFFER AND OPTIONAL
OUTPUT FILTER
Output buffering on all three DACs is necessary in order to
drive output devices, such as SD or HD monitors.
Analog Devices produces a range of suitable op amps for this
application, such as the AD8061. More information on line
driver buffering circuits is given in the relevant op amp data sheets.
An optional analog reconstruction low-pass filter (LPF) may be
required as an anti-imaging filter if the ADV7330 is connected
to a device that requires this filtering.
The filter specifications vary with the application.
Application Oversampling (MHz)
SD
SD
PS
PS
HDTV
HDTV
LOAD
has a value of 300 Ω for full-scale output.
Table XV. External Filter Requirements
2×
16×
1×
8×
1×
2×
REF
is used. Alternatively, the ADV7330 can
REF
(AD1580).
SET
AA
Cutoff
Frequency Attenuation
>6.5
>6.5
>12.5
>12.5
>30
>30
through a 0.1 µF capacitor
values should not be changed.
SET
–50 dB @ (MHz)
20.5
209.5
14.5
203.5
44.25
118.5
pin and AGND
SET
must
REF
–50–
Table XVI shows possible output rates from the ADV7330.
Input Mode
Address 01h, Bit 6–4
SD
PS
HDTV
OUTPUT
–10
–20
–30
–40
–50
–60
–70
–80
Figure 46. Example for Output Filter for SD,
16 × Oversampling
Figure 47. Filter Plot for Output Filter for SD,
16 × Oversampling
0
DAC
1M
GROUP DELAY (sec)
600
10 H
22pF
CIRCUIT FREQUENCY RESPONSE
10M
FREQUENCY (Hz)
600
PLL
Address 00h, Bit 1 Rate
Off
On
Off
On
Off
On
Table XVI.
560
3
4
PHASE (Deg)
100M
560
MAGNITUDE (dB)
1
75
Output
27 MHz (2×)
216 MHz (16×)
27 MHz (1×)
216 MHz (8×)
74.25 MHz (1×)
148.5 MHz (2×)
BNC
OUTPUT
1G
0
–30
–60
–90
–120
–150
–180
–210
–240
REV. B
24n
21n
18n
15n
12n
9n
6n
3n
0