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參數(shù)資料
| 型號： | TDA4780 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)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)： | 19/44頁 |
| 文件大?。?/td> | 321K |
| 代理商： | TDA4780 |
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1997 Feb 06
19
Philips Semiconductors
Preliminary specification
RGB video processor with automatic
cut-off control and gamma adjust
TDA4780
RGB input 2 (R
2
: pin 2, G
2
: pin 3, B
2
: pin 4; capacitively coupled to a low-ohmic source;
recommendation: maximum 600
);
note 1
V
2, 3, 4(p-p)
input signal (peak-to-peak value)
R
2, 3, 4
AC input resistance
V
2, 3, 4
internal bias during clamping
I
2, 3, 4
DC input current between clamping
pulses
I
2, 3, 4(max)(clamp)
maximum input current during clamping
10.0
0.7
5.1
0.1
V
M
V
μ
A
100
180
260
μ
A
Fast signal switches and blanking (fast signal switch 1 (pin 13); Y, CD / R
1
, G
1
, B
1
; control bits FSDIS1,
FSON1)
V
13
V
13
R
13
C
ROSSTALK
(
SEE
T
ABLE
5)
t
s
t
i
voltage to select Y and CD
voltage range to select R
1
, G
1
and B
1
internal resistor to ground
0.9
3.3
0
1.0
3.8
0.4
5.5
4.8
V
V
k
difference between transit times for
signal switching and signal insertion
10
ns
Fast signal switch 2 (pin 1; Y, CD or R
1
, G
1
, B
1
/ R
2
, G
2
, B
2
; control bits FSDIS2, FSON2)
V
1
voltage to select Y and CD / R
1
, G
1
and
B
1
voltage range to select R
2
, G
2
and B
2
required minimal voltage to switch off the
ADBL measurement
internal resistor to ground
0
0.4
V
V
1
V
1
0.9
1.0
0.87
5.5
1.0
V
V
R
1
C
ROSSTALK
(
SEE
T
ABLE
5)
t
s
t
i
R
1
> R
13
2.8
4.2
6.0
k
difference between transit times for
signal switching and signal insertion
10
ns
Adjust stages (adaptive black, gamma, contrast, saturation, brightness and white point adjust, blue stretch)
A
DAPTIVE BLACK
(
DETECTORS INACTIVE STATUS DUE TO ACTION OF FAST SWITCH
2 (
PIN
1); see Table 4, Fig.9 and note 2)
I
18(dch)
discharge current of peak dark storage
capacitor
outside active
measurement window
inside active
measurement window
1.0
0.0
+1.0
μ
A
1.5
2.5
3.5
μ
A
I
18(ch)
charge current of peak dark storage
capacitor
maximum level shift:
black level in
percent of nominal signal amplitude
difference between nominal black and
adaptive black in percent of nominal
signal amplitude
detectors inactive time before blanking
detectors inactive time after blanking
360
300
250
μ
A
d
bl(max)
10
13
16
%
d
bl(nom)
3
0
+3
%
t
dibb
t
diab
2.3
2.3
3.1
2.5
4.0
3.4
μ
s
μ
s
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
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