TDA4455 Datasheet, PDF (8/12 Pages) TEMIC Semiconductors – Multistandard VIF Amplifier and PLL Demodulator

TDA4455
IF-AGC, Switching Thresholds
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TELEFUNKEN Semiconductors
4.2 V Ultra white level: zero carrier
4.0 V White level: 10 % carrier
2.0 V Sync. peak level: 100% carrier
(charge / discharge threshold)
Figure 12. B/G-standard (neg. modulated)
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4.0 V Peak level: 100 % carrier
(charge threshold)
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Dig.:
Sound
+Sync.
Analog:
Chrominance
Diff.: Signal
[ 2.4 V Average discharge threshold
v 2.0 V Sync. peak level : 6 % carrier
1.9 V Ultra black level: zero carrier
Figure 13. L-standard (pos. modulated)
Analog:
Luminance Signal
[4.2 V DC value: zero carrier
4.1 V Average discharge threshold
4.0 V White level: 10 % carrier
8 (12)
2.0 V Black level: 100 % carrier
(charge threshold)
Figure 14. D2MAC-standard (neg. modulated)
Preliminary Information
Rev. A1: 08.05.1995