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參數(shù)資料
| 型號： | TDA4780 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | RGB video processor with automatic cut-off control and gamma adjust |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PDIP28 |
| 封裝： | 0.600 INCH, PLASTIC, DIP-28 |
| 文件頁數(shù)： | 20/44頁 |
| 文件大?。?/td> | 321K |
| 代理商： | TDA4780 |
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1997 Feb 06
20
Philips Semiconductors
Preliminary specification
RGB video processor with automatic
cut-off control and gamma adjust
TDA4780
G
AMMA ADJUST
(
ACTS ON INTERNAL
Y
SIGNAL
; Y
MATRIX SEE
Y
OUTPUT
; I
2
C-
BUS CONTROLLED POTENTIOMETER
(
SUBADDRESS
0BH);
RESOLUTION
6
BIT
; note 3)
d
g
range of gamma
minimum (3FH)
maximum (00H)
maximum gain at minimum gamma
5
0.7
1.0
6
7
dB
G
max
S
ATURATION ADJUST
(
ACTS ON
RGB
SIGNALS
; Y
MATRIX SEE
Y
OUTPUT
; I
2
C-
BUS CONTROLLED POTENTIOMETERS
(
SUBADDRESS
01H);
RESOLUTION
1.5%
OF MAXIMUM SATURATION
)
near nominal black
d
s(max)
maximum saturation
I
2
C-bus data 3FH;
measured at 100 kHz;
relative to nominal
saturation; note 4
I
2
C-bus data 00H;
measured at 100 kHz;
relative to typical value
of maximum saturation
4.7
5.2
5.8
dB
d
s(min)
minimum saturation
50
dB
C
ONTRAST ADJUST
(
ACTS ON
RGB
SIGNALS
; I
2
C-
BUS CONTROLLED POTENTIOMETERS
(
SUBADDRESS
02H);
RESOLUTION
1.5%
OF MAXIMUM CONTRAST
)
d
c(max)
maximum contrast
I
2
C-bus data 3FH;
limiters inactive;
relative to nominal
contrast; note 5
I
2
C-bus data 00H;
relative to maximum
contrast
4.5
5.5
dB
d
c(min)
minimum contrast
28
22
16
dB
B
RIGHTNESS ADJUST
(
ACTS ON
RGB
SIGNALS
; I
2
C-
BUS CONTROLLED POTENTIOMETERS
(
SUBADDRESS
00H);
RESOLUTION
1.5%
OF RANGE
;
BLACK LEVEL IN PERCENT OF NOMINAL SIGNAL AMPLITUDE REFERRED TO CUT
-
OFF MEASURING LEVEL
)
d
br(max)
maximum brightness:
black level
d
br(nom)
nominal brightness:
black level
d
br(min)
minimum brightness:
black level
d
br(max)
maximum brightness:
black level
I
2
C-bus data 3FH
I
2
C-bus data 29H
I
2
C-bus data 00H
I
2
C-bus data 3FH;
control bits BCOF = 1
and MOD2 = 0
I
2
C-bus data 00H;
control bits BCOF = 1
and MOD2 = 0
23
7
58
23
30
0
50
30
37
+7
42
37
%
%
%
%
d
br(min)
minimum brightness:
black level
58
50
42
%
B
LUE STRETCH
(
BLUE STRETCH IS ACTIVATED BY
I
2
C-
BUS CONTROL BIT
BLST = 1; see Fig.9)
G
bs
increase of small signal gain
100% of nominal signal
amplitude and at 1 MHz
15
20
25
%
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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