參數(shù)資料
型號: SAA7183A
廠商: NXP Semiconductors N.V.
英文描述: Digital Video Encoder EURO-DENC2
中文描述: 數(shù)字視頻編碼器歐元,DENC2
文件頁數(shù): 41/45頁
文件大小: 203K
代理商: SAA7183A
1996 Oct 02
41
Philips Semiconductors
Preliminary specification
Digital Video Encoder (EURO-DENC2)
SAA7182A; SAA7183A
Analog output voltages
The analog output voltages are dependent on the open
loop voltage of the operational amplifiers for full-scale
conversion (typical value 1.4 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 40 for a
100
100
colour bar signal.
Values for the external series resistors result from a 75
load (see Figs 20 and 21).
The analog inputs RI, GI, and BI are shifted first by an
offset of 0.16 V (typical value), followed by an amplification
of 1.72 (typical value). For an input voltage of 0 to 0.7 V an
open loop output voltage of 0.28 to 1.48 V is achieved,
resulting in V
o
= 0.86 V (p-p) with an internal series
resistor of 2
, an external series resistor of 27
at a 75
load impedance.
Table 40
Digital output signals conversion range
CONVERSION RANGE (peak-to-peak
CVBS, SYNC
TIP-TO-PEAK CARRIER
(digits)
Y (VBS) SYNC TIP-TO-WHITE
(digits)
RGB (Y)
BLACK-TO-WHITE AT GDY = GDC =
6
(digits)
1023
888
712
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