ADV7162KS220 Analog Devices Inc, ADV7162KS220 Datasheet - Page 33

• Manufacturer Part Number: ADV7162KS220
• Description: IC DAC VIDEO COLOR 96BIT 160MQFP
• Manufacturer: Analog Devices Inc
• Type: Video DACr

Specifications of ADV7162KS220

• Rohs Status: RoHS non-compliant
• Applications: HDTV
• Mounting Type: Surface Mount
• Package / Case: 160-MQFP, 160-PQFP

REV. 0
Variations on RS-343A
Various other video output configurations can be implemented
by the ADV7160/ADV7162, including RS-170. The table
shows calculated values of DAC Gain for some of the most
common variants on the RS-343A standard. The associated
waveforms are shown in the diagrams.
Gain
4224
4311
5592
OUTPUT WITHOUT
OUTPUT WITHOUT
SYNC ENCODED
SYNC ENCODED
Figure 49. Composite Video Waveform SYNC and
TRISYNC decoded; Pedestal = 7.5 IRE; DAC Gain = 5592
26.67
18.62
mA
mA
2.00
Figure 48. Composite Video Waveform SYNC
Decoded; Pedestal = 0 IRE; DAC Gain = 4224
0
0
Video Signal
RS343A, SYNC decoded on output; Pedestal = 0 IRE
RS343A, No SYNC decoded; Pedestal = 0 IRE
RS170, SYNC decoded; Pedestal = 7.5 IRE
0.698
0.075
1.00
0
V
V
0
Description
WHITE LEVEL
VIDEO
VIDEO to BLANK
BLACK LEVEL
BLACK to BLANK
BLANK LEVEL
SYNC LEVEL
SYNC ENCODED
26.67
8.05
SYNC ENCODED
10.67
OUTPUT WITH
37.33
21.24
12.67
mA
OUTPUT WITH
mA
0
0
1.000
0.302
1.400
0.800
0.475
0.400
V
V
0
0
92.5 IRE
100 IRE
43 IRE
40 IRE
7.5 IRE
O/P with Sync
Enabled (mA)
26.67
Video + 9.05
Video + 1.44
9.05
1.44
7.62
0
Table III. Video Output Truth Table
WHITE
LEVEL
SYNC
LEVEL
BLANK/
BLACK
LEVEL
O/P with Sync
Disabled (mA)
19.05
Video + 1.44
Video + 1.44
1.44
1.44
0
0
WHITE
LEVEL
TRISYNC
LEVEL
BLACK
LEVEL
BLANK
LEVEL
SYNC
LEVEL
–33–
Output Currents
The various output currents are set by V
gain. By programming the Command Register Bits and choos-
ing the correct DAC Gain value, video waveforms conforming
to the common variations on RS-170 and RS-343A, as well as
HDTV standards may be generated. The currents generated
can be summarized as:
Figure 50. Composite Video Waveform Pedestal = 0
IRE; DAC Gain = 4311
OUTPUT WITHOUT
19.05
SYNC ENCODED
mA
0
0.714
V
0
I
I
I
I
I
OUT
DAC
SYNC
TRISYNC
BLANK
100 IRE
SYNC
1
1
0
1
0
1
0
(mA)
(mA) 0.4322
I
DAC
(mA) 0.0817
(mA) 0.4322
DAC GAIN
I
BLANK
1
1
1
1
0
1
0
BLANK
R
ADV7160/ADV7162
SET
I
V
DAC
I
REF
I
SYNC
DAC
I
DAC
Input Data
3FFH
Data
Data
000H
000H
xxxH
xxxH
DAC
REF
, R
I
TRISYNC
SET
and the DAC
WHITE LEVEL
BLANK/BLACK
LEVEL