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TB1227CNG Datasheet(PDF) 89 Page - Toshiba Semiconductor

Part No. TB1227CNG
Description  VIDEO, CHROMA AND SYNCHRONIZING SIGNALS PROCESSING IC FOR PAL / NTSC / SECAM SYSTEM COLOR TV
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
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TB1227CNG Datasheet(HTML) 89 Page - Toshiba Semiconductor

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TB1227CNG
2004-05-24
89
TEST CONDITION (Unless otherwise specified : H, RGB VCC = 9V ; VDD, Fsc VDD, Y / C VCC = 5V ; Ta = 25±3°C)
BUS : TEST MODE
BUS : NORMAL CONTROL MODE
S
02H
07H
0FH
10H
1FH
NOTE
ITEM
26
D4 D3 D2 D7 D5 D4 D4 D7 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2 D1 D0
MEASURING METHOD
S7
Color Difference
Attenuation Quantity
OFF —
— —
0
000
0
0
0
011
0
0
0
001
(1) The same procedure as the steps 1 and 2 of the
Note S5.
(2) In the condition that SUB (IF) D6 = 1, measure
amplitudes of color difference signals of pin 35
and pin36 as VRSA and VBSA respectively, and
find SATTR and SATTB from measurement
results.
SATTR = 20ℓog (VRSA / VRS),
SATTB = 20ℓog (VBSA / VBS)
S8
Color Difference S / N
Ratio
— —
0
(1) The same procedure as the steps 1 and 2 of the
Note S5.
(2) Input non-modulated 200Vp-p (R-Y) chroma
signal to pin 42.
(3) Measure noise amplitude nR and nB (mVp-p)
appearing in color difference signals of pin 35 and
pin 36 respectively.
(4) Find S / N ratio by the following equation.
3)
10E
nB
/
VBS
2
(2
og
20
S
-
SNB
×
×
=
l
3)
10E
nR
/
VRS
2
(2
og
20
S
-
SNR
×
×
=
l
S9
Linearity
— — — —
— —
(1) The same procedure as the step 1 of the Note S5.
(2) Measure and calculate amplitude of black bar
levels in output waveforms of pin 35 and pin 36 as
shown below.
LinB = V [cyan] / V [red]
LinR = V [yellow] / V [blue]
Maximum positive /
negative amplitudes in
respective axes


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