TDA4886A Datasheet, PDF (32/52 Pages) NXP Semiconductors – 140 MHz video controller with I2C-bus

Philips Semiconductors
140 MHz video controller with I²C-bus
Product specification
TDA4886A
12 TEST AND APPLICATION INFORMATION
handbook, full pagewidth
fast blanking
1
24
OSD
inputs
2
23
3
22
4
21
5
20
6
19
TDA4886A
7
18
8
17
9
16
10
15
11
14
12
13
contrast modulation input limiting input
subcontrast setting
90 V
Application with integated
post amplifier, DC-coupled cathode
and negative feedback.
to cathode
70 V
BLACK LEVEL
RESTORATION
to cathode
Application with integated
post amplifier, AC-coupled cathode
and black level restoration cicuit.
90 V
Application with discrete
post amplifier, DC-coupled
cathode and negative
feedback.
to cathode
8V
pull-up
5V
resistors
MHB266
I²C-BUS
output clamping
blanking
input clamping
vertical blanking
Fig.15 Basic applications for different kinds of post amplifiers with DC or AC coupling.
12.1 Test boards
For high frequency measurements a special test
application and printed-circuit board with only a few
external components is built. It utilizes the internal positive
feedback of the output signals during output clamping with
control bit FPOL = 1. Figure 16 shows the test application
circuit and Figs 17 and 18 show the layout and mounting
of the double-sided printed-circuit board. Most
components are of SMD type. Short HF loops and
minimum crosstalk between the channels and between
signal inputs and outputs are achieved by properly shaped
ground areas.
1998 Dec 04
32