saa7182a NXP Semiconductors, saa7182a Datasheet - Page 41

• Manufacturer Part Number: saa7182a
• Description: Digital Video Encoder Euro-denc2
• Manufacturer: NXP Semiconductors

Philips Semiconductors
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
Table 40 Digital output signals conversion range
1996 Oct 02
TIP-TO-PEAK CARRIER
Digital Video Encoder (EURO-DENC2)
CVBS, SYNC
(digits)
1023
100
100
Y (VBS) SYNC TIP-TO-WHITE
colour bar signal.
CONVERSION RANGE (peak-to-peak
(digits)
888
41
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
resistor of 2 , an external series resistor of 27
load impedance.
BLACK-TO-WHITE AT GDY = GDC = 6
o
= 0.86 V (p-p) with an internal series
SAA7182A; SAA7183A
RGB (Y)
(digits)
712
Preliminary specification
at a 75