sab9075h NXP Semiconductors, sab9075h Datasheet - Page 35

• Manufacturer Part Number: sab9075h
• Description: Picture-in-picture Pip Controller For Ntsc
• Manufacturer: NXP Semiconductors

Philips Semiconductors
TEST AND APPLICATION INFORMATION
Fig.20 shows how the ADCs and the DACs can be
connected in the application.
The generation of the reference voltages is carried out
internally and they have to be externally decoupled for AC
signals.
For all ADCs and DACs the internal resistor division is
such that a maximum signal voltage level of 1.5 V is
obtained. For the ADCs there is a DC offset voltage of
0.4 V.
February 1995
handbook, full pagewidth
Picture-in-Picture (PIP) controller for NTSC
MAV DDA
MAV SSA
SAV DDA
MAV refB
SAV SSA
SAV refT
SAV refB
MAV refT
MU
MY
MV
SU
SY
SV
Fig.20 Analog application diagram ADCs and DACs.
R top
R top
R bottom
R bottom
ADC
ADC
ADC
ADC
ADC
ADC
PROCESSING
SIGNAL
VIDEO
35
A modification of these reference voltages can be
achieved by external shunting.
The ADC reference voltages are the same for all Y/U/V
channels which means that their input levels need to be
the same. The DAC voltage references can be set
separately for Y/U/V channels. These reference voltages
can be modified by shunting.
The output buffers of the DACS are PMOS source
followers with a minimum output load of 10 k .
DAC
DAC
DAC
3R top
MGC001
DAV refTY
DAV refTU
DAV refTV
DY
DU
DV
DAV SSA
DAV DDA
Preliminary specification
SAB9075H