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PDF TDA9207 Data sheet ( Hoja de datos )

Número de pieza TDA9207
Descripción 150 MHz PIXEL VIDEO CONTROLLER FOR MONITORS INCLUDING CUT-OFF INPUTS
Fabricantes ST Microelectronics 
Logotipo ST Microelectronics Logotipo



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TDA9207
150 MHz PIXEL VIDEO CONTROLLER FOR MONITORS
INCLUDING CUT-OFF INPUTS
FEATURE
s 150 MHZ PIXEL RATE
s 2.7 ns RISE AND FALL TIME
s I2C BUS CONTROLLED
s GREY SCALE TRACKING VERSUS BRIGHT-
NESS
s OSD MIXING
s NEGATIVE FEED-BACK FOR DC COUPLING
APPLICATION
s INTERNAL POSITIVE FEED-BACK FOR LCD
APPLICATION
s 0.5~4.5 V DACs FOR BLACK LEVEL RESTO-
RATION (AC-COUPLING APPLICATION) OR
CUT-OFF CONTROLS (FOR DC-COUPLING
APPLICATION USING THE ST AMPLIFIERS
TDA9533/9530)
s BEAM CURRENT ATTENUATION (ABL)
s PEDESTRAL CLAMPING ON OUTPUT
STAGE
s POSSIBILITY OF LIGHT OR DARK GREY
OSD BACKGROUND
s OSD INDEPENDENT CONTRAST CONTROL
s ADJUSTABLE BANDWIDTH
s INPUT BLACK LEVEL CLAMPING WITH
BUILT-IN CLAMPING PULSE
s STAND-BY MODE
s 5 V TO 8 V POWER SUPPLY
s SYNC CLIPPING FUNCTION (SOG)
DESCRIPTION
The TDA9207 is an I2C Bus controlled RGB pre-
amplifier designed for Monitor application, able to
mix the RGB signals coming from any OSD de-
vice. The usual Contrast, Brightness, Drive and
Cut-Off Controls are provided.
In addition, it includes the following features:
– OSD contrast,
– Bandwidth adjustment,
– Grey background,
– Internal back porch clamping pulse generator.
SHRINK DIP24
(Shrink Plastic Package)
ORDER CODE: TDA9207
The RGB incoming signals are amplified and
shaped to drive any commonly used video amplifi-
ers without intermediate follower stages. Even
though encapsulated in a 24-pin package only,
this IC allows any kind of CRT Cathode coupling :
– AC coupling with DC restore,
– DC coupling with Feed-back from Cathodes,
– DC coupling with Cut-Off controls of the Video
amplifier (ST Amplifiers TDA9533/9530).
As for any ST Video pre-amplifier, the TDA9207 is
able to drive a real load without any external inter-
face.
One of the main advantages of ST devices is their
ability to sink and source currents while most of
the devices from our competitors have problems
to sink large currents.
These driving capabilities combined with an origi-
nal output stage structure suppress any static cur-
rent on the output pins and therefore reduce dra-
matically the power dissipation of the device.
Extensive integration combined with high perform-
ance and advanced features make the TDA9207
one of the best choice for any CRT Monitor in the
14” to 17” range.
Perfectly matched with the ST Video Amplifiers
TDA9530/33, these 2 products offer a complete
solution for high performance and cost-optimized
Video Board Application.
March 2000
Version 4.2
1/22
1

1 page




TDA9207 pdf
TDA9207
Figure 2.
Attenuation (dB)
0
-2
-4
-6
-8
-10
-12
-14
-16
012
3
VABL (V)
45
4.6 Brightness Adjustment (8 bits)
Brightness adjustment is controlled by the I2C Bus
via Register 2. It consists of adding the same DC
voltage to the three RGB signals, after contrast ad-
justment. When the blanking pulse equals 0, the
DC voltage is set to a value which can be adjusted
between 0 and 2V with 8mV steps (see Figure 3).
The DC output level is forced to the ”Infra Black”
level (VDC) when the blanking pulse is equal to 1.
4.7 Drive Adjustment (3 x 8 bits)
In order to adjust the white balance, the TDA9207
offers the possibility of adjusting separately the
overall gain of each channel thanks to the I2C bus
(Registers 3, 4 and 5).
The very large drive adjustment range (48 dB) al-
lows different standards or custom color tempera-
tures.
It can also be used to adjust the output voltages at
the optimum amplitude to drive the CRT drivers,
keeping the whole contrast control for the end-
user only.
The drive adjustment is located after the Contrast,
Brightness and OSD switch blocks, so it does not
affect the white balance setting when the BRT is
adjusted. It also operates on the OSD portion of
the signal.
4.8 OSD Inputs
The TDA9207 allows to mix the OSD signals into
the RGB main picture. The four pins dedicated to
this function are the following:
– Three TTL RGB inputs (Pins 9, 10, 11) connect-
ed to the three outputs of the corresponding OSD
processor.
– One TTL fast blanking input (Pin 12) also con-
nected to the FBLK output of the OSD processor.
When a high level is present on the FBLK, the IC
acts as follows:
– The three main picture RGB input signals (IN1,
IN2, IN3) are internally switched to the internal
input clamp reference voltage.
– The three output signals are set to the voltage
corresponding to the three OSD input logic
states (0 or 1). (See Figure 3).
If the OSD input is at low level, the output and
brightness voltages (VBRT) are equal.
If the OSD input is at high level, the output voltage
iasnVI2OCSDb,uws-hceornetrVoOlleSdD
= VBRT
voltage.
+
OSD
and
OSD
is
OSD varies between 0 V to 4.9 V by 320 mV steps
via Register 7 (4 bits). The same variation is ap-
plied simultaneously to the three channels provid-
ing the OSD contrast.
The grey color can be obtained on output signals
when:
– OSD1 = 1, OSD2 = 0 and OSD3 = 1,
– A special bit (bit 5 or 6) in Register 9 is set to 1.
If R9b5 is set to 1, light grey is obtained on output.
If R9b6 is set to 1, dark grey is obtained on output.
In the case where R9b5 and R9b6 are set to 0, the
normal operation is provided on output signals.
4.9 Output Stage
The overall waveforms of the output signal are
shown in Figure 3 and Figure 4. The three output
stages, which are large bandwidth output amplifi-
ers, are able to deliver up to 4.4 VPP for 0.7 VPP on
input.
When a high level is applied on the BLK input
(Pin 24), the three outputs are forced to ”Infra
Black” level (VDC) thanks to a sample and hold cir-
cuit (described below).
The black level (which is the output voltage out-
side the blanking pulse with minimum brightness
and no Video input signals) is 400 mV higher than
VDC.
The brightness level
programming register
(VBRT)
2 (see
is
I2C
then obtained
table 1).
by
The sample and hold circuit is used to control the
”Infra Black” level in the range of 0.5 V to 2.5 V via
Register 6 (in case of AC coupling) or Registers
10, 11, 12 (in case of DC coupling) .
This sampling occurs during an internal pulse
(OCL) generated inside the blanking pulse win-
dow.
Refer to “CRT cathode coupling” part for further
details.
5/22

5 Page





TDA9207 arduino
TDA9207
5 - ABSOLUTE MAXIMUM RATINGS
Symbol
VCCA Max.
VCCP Max.
Vin Max.
VI Max.
Tstg
Toper
Parameter
Supply Voltage on Analog VCC
Supply Voltage on Power VCC
Voltage at any Input Pins (except Video inputs) and Input/Output Pins
Voltage at Video Inputs
Storage Temperature
Operating Junction Temperature
Pin
7
20
-
1, 3, 5
-
-
Value
5.5
8.8
5.5
1.4
-
+150
Units
V
V
V
V
°C
°C
6 - THERMAL DATA
Symbol
Rth(j-a)
Tj
Parameter
Max. Junction-ambient Thermal Resistance
Typ. Junction Temperature at Tamb = 25°C
Value
69
80
Units
°C/W
°C
7 - DC ELECTRICAL CHARACTERISTICS
Tamb = 25°C, VCCA = 5V, VCCP = 8V, unless otherwise specified.
Symbol
Parameter
Test Conditions
VCCA
VCCP
ICCA
ICCP
VI
Analog Supply Voltage
Power Supply Voltage
Analog Supply Current
Power Supply Current
Video Input Voltage Amplitude
Pin 7
Pin 20
VCCA = 5V
VCCP = 8V
Vo Output Voltage Range
VIL Low Level Input Voltage
VIH High Level Input Voltage
IIN Input Current
RHS Input Resistor
OSD, FBLK, BLK, HSYNC
OSD, FBLK, BLK
HSYNC
Min.
4.5
4.5
0.5
2.4
-1
Typ.
5
8
70
55
0.7
40
Max.
5.5
8.8
1
VCCP
-0.5V
0.8
1
Units
V
V
mA
mA
V
V
V
V
µA
k
11/22

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