MAX9526 Maxim Integrated Products, MAX9526 Datasheet - Page 28

• Manufacturer Part Number: MAX9526
• Description: High-Performance NTSC/PAL Video Decoder
• Manufacturer: Maxim Integrated Products

www.DataSheet4U.com
Low-Power, High-Performance
NTSC/PAL Video Decoder
This bit controls the gain of the analog AGC preceding
the ADC. This bit only functions when ADAGC = 1. The
1 = Chrominance demodulator is disabled and component
0 = Chrominance demodulator is enabled (default).
The color kill threshold is relative to the peak-to-peak
amplitude of the color burst of the composite video sig-
nal at the video inputs (V
assume the sync amplitude is the standard level.
Table 7. Analog AGC Code and Gain Values
Color Kill Register
Color Kill Threshold (CTHRSH)
28
video output is black and white only.
REG
0x0B
______________________________________________________________________________________
AGC GAIN CODE
CTHRSH
(default)
0000
0001
0010
0011
0100
0101
0110
0111
0000
0001
0010
0011
0100
0101
0110
0111
BW
B7
Analog AGC Gain (AGCGAIN)
IN1
/V
CRKDIS
IN2
B6
BUSRT AMPLITUDE (mV)
Black and White (BW)
). The threshold values
TYPICAL FULL-SCALE
CONVERSION RANGE
(mV)
752
683
626
578
535
500
469
441
Off
Off
19
25
27
29
30
31
B5
1
B4
0
gain steps are linear in magnitude. Table 7 shows the
AGC’s effect on the input full-scale conversion range.
1 = Color kill is disabled.
0 = Automatic color kill is enabled (default).
Black and white (BW) control bit takes precedence over
CRKDIS.
AGC GAIN CODE
CTHRSH
B3
1000
1001
1010
1011
1100
1101
1110
1111
1000
1001
1010
1011
1100
1101
1110
1111
B2
CTHRSH
Color Kill Disable (CRKDIS)
BUSRT AMPLITUDE (mV)
TYPICAL FULL-SCALE
CONVERSION RANGE
B1
(mV)
417
394
375
357
341
326
313
300
35
39
40
41
43
45
48
51
B0