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2.2 Input signal amplitude
TC90101FG has a 10bit ADC for CVBS & Y signal and 2ch 8bit ADC for C & Cb/Cr.
The Dynamic range of ADC is desgned as AVDD *0.4 (Normally 1Vpp at AVDD = 2.5V).
The recomemdation amplitude of the input signal : 0.7Vpp at 140IRE (CVBS/Y) . refer to fig-1.
* in case of AGC ON, recommendation input signal amplitude is 0.6Vpp (140IRE).
(AGC control range is from - 6dB to +3dB.)
<IRE>
100
80
60
40
20
0
-20
-40
〈IRE〉
20
0
-20
Feb./2005
Fig-1. Amlitude of CVBS input
Fig-2. Amlitude of C input
Fig-3. Amlitude of base band C signal input
<Lsb>
1023
767
AVDD×0.4V
0.7Vp-p
256
51
0
<Lsb>
255
153
0.2Vp-p
128
103
0
<Lsb>
255
217
0.7Vp-p
128
39
0
TC90101FG
6
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