ADV7190KSTZ Analog Devices Inc, ADV7190KSTZ Datasheet - Page 51
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ADV7190KSTZ
Manufacturer Part Number
ADV7190KSTZ
Description
Manufacturer
Analog Devices Inc
Datasheet
1.ADV7190KSTZ.pdf
(72 pages)
Specifications of ADV7190KSTZ
Number Of Dac's
6
Adc/dac Resolution
10b
Screening Level
Commercial
Package Type
LQFP
Pin Count
64
Lead Free Status / RoHS Status
Compliant
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External buffering is needed on the ADV7190/ADV7191 DAC
outputs. The configuration in Figure 99 is recommended.
When calculating absolute output full-scale current and voltage
use the following equations:
REV. B
1.2k
1.2k
PIXEL
PORT
Figure 99. Output DAC Buffering Configuration
R
R
SET1
SET2
V
K = 4.2146 constant, V
REF
DIGITAL
ADV7190/ADV7191
CORE
I
OUT
V
V
AA
OUT
= (V
= I
DAC A
DAC B
DAC C
DAC D
DAC E
DAC F
REF
OUT
¥ K)/R
¥ R
REF
LOAD
= 1.235 V
SET
OUTPUT
BUFFER
OUTPUT
BUFFER
OUTPUT
BUFFER
OUTPUT
BUFFER
OUTPUT
BUFFER
OUTPUT
BUFFER
CVBS
LUMA
CHROMA
G
B
R
DAC BUFFERING
APPENDIX 7
–51–
Figure 100. Recommended DAC Output Buffer Using an
Op Amp
FILTER O/P
OPTIONAL
INPUT/
3
4
AD8051
–V
+V
ADV7190/ADV7191
CC
CC
5
2
1
OUTPUT TO
TV MONITOR
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