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參數(shù)資料
| 型號： | SAA7120H-01 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Digital Video Encoder (ConDENC) |
| 中文描述： | 數(shù)字視頻編碼器（ConDENC） |
| 文件頁數(shù)： | 10/32頁 |
| 文件大小： | 225K |
| 代理商： | SAA7120H-01 |
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1997 Jan 06
10
Philips Semiconductors
Preliminary specification
Digital Video Encoder (ConDENC)
SAA7120; SAA7121
Fig.7 Teletext timing.
handbook, full pagewidth
tTTXWin
tTTX
tPD
tFD
CVBS/Y
TTX
TTXRQ
textbit #:
1
2
3
4
5
6
7
8
9
10 11
12
13
14
15
16
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18 19 20
21
22
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MBH788
Analog output voltages
The analog output voltages are dependent on the
open-loop voltage of the operational amplifiers for
full-scale conversion (typical value 1.35 V), the internal
series resistor (typical value 2
), the external series
resistor and the external load impedance.
The digital output signals in front of the DACs under
nominal conditions occupy different conversion ranges, as
indicated in Table 1 for a
100
100
colour bar signal.
Values for the external series resistors result in a 75
load.
Input levels and formats
The ConDENC expects digital Y, Cb, Cr data with levels
(digital codes) in accordance with “CCIR 601”(see
Tables 2 and 3).
For C and CVBS outputs, deviating amplitudes of the
colour difference signals can be compensated by
independent gain control setting, while gain for luminance
is set to predefined values, distinguishable for 7.5 IRE
set-up or without set-up.
Reference levels are measured with a colour bar,
100% white, 100% amplitude and 100% saturation.
Table 1
Digital output signals conversion range
Table 2
“CCIR 601”signal component levels
CONVERSION RANGE (peak-to-peak) (digits)
CVBS, SYNC
TIP-TO-PEAK CARRIER
Y (VBS) SYNC
TIP-TO-WHITE
1016
881
COLOUR
SIGNALS
Y
Cb
Cr
White
Yellow
Cyan
Green
Magenta
Red
Blue
Black
235
210
170
145
106
81
41
16
128
16
166
54
202
90
240
128
128
146
16
34
222
240
110
128
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA7121 | Digital Video Encoder (ConDENC) |
| SAA7124HZ | Digital Video Encoder ECO-DENC |
| SAA7124 | Digital Video Encoder ECO-DENC |
| SAA7124H | Digital Video Encoder ECO-DENC |
| SAA7125 | Digital Video Encoder ECO-DENC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7121 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Digital Video Encoder (ConDENC) |
| SAA7121H | 制造商:NXP Semiconductors 功能描述: |
| SAA7121H/V2 | 制造商:NXP Semiconductors 功能描述: |
| SAA7121H/V2,518 | 功能描述:視頻 IC SAA7121H/QFP44/REEL13DP//V2 RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
| SAA7121H/V2,557 | 功能描述:視頻 IC DIG VID ENCODER NTSC PAL RoHS:否 制造商:Fairchild Semiconductor 工作電源電壓:5 V 電源電流:80 mA 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-28 封裝:Reel |
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