tda8376ah NXP Semiconductors, tda8376ah Datasheet - Page 28

• Manufacturer Part Number: tda8376ah
• Description: I2c-bus Controlled Pal/ntsc Tv Processors
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Notes
1. Signal with negative-going sync. Amplitude includes sync pulse amplitude.
2. This parameter is not tested during production but is guaranteed by the design and qualified by means of matrix
3. This parameter is measured at nominal settings of the various controls.
4. Indicated is a signal for a colour bar with 75% saturation (chrominance : burst ratio = 2.2 : 1).
5. The RGB1 inputs (pins 14 to 17) have priority over the RGB2 inputs (pins 23 to 25).
6. Nominal contrast is specified with the DAC in position 20H. Nominal saturation as maximum 10 dB. In the nominal
7. This parameter is not tested during production and is just given as application information for the designer of the
8. The 3 dB bandwidth of the circuit can be calculated by means of the following equation:
9. Valid for a signal amplitude on the Y-input of 0.7 V black-to-white (100 IRE) with a rise time (10% to 90%) of 70 ns
10. For video signals with a black level which deviates from the back-porch blanking level the signal is ‘stretched’ to the
11. The slicing level is independent of sync pulse amplitude. The given percentage is the distance between the slicing
1996 Jan 26
B
V
V
V
V
V
I
I
ch(int)
disch
SYMBOL
EAM CURRENT LIMITING
CR
diffCR
BR
diffBR
bias
I
2
batches which are made in the pilot production period.
brightness setting the black level at the outputs is identical to the level of the black-current measuring pulses.
television receiver.
and the video switch in the Y/C mode. During production the peaking function is not tested by measuring the
overshoots but by measuring the frequency response of the Y output.
blanking level. The amount of correction depends on the IRE value of the signal (see Fig.10). The black level is
detected by the capacitor connected to pin 2. The black level stretcher can be made inoperative by connecting pin 2
to the positive supply line. The values given are valid only when the luminance input signal (pins 7, 9 and 13) has a
value of 1 V (p-p).
level and the black level (back porch).
f
C-bus controlled PAL/NTSC TV processors
–
3 dB
=
f
osc
contrast reduction starting voltage
voltage difference for full contrast
reduction
brightness reduction starting voltage
voltage difference for full brightness
reduction
internal bias voltage
internal charge current
discharge current due to ‘peak-white
limiting’
1
–
------- -
2Q
1
(
PIN
PARAMETER
22); note 23
28
CONDITIONS
TDA8376; TDA8376A
MIN.
3.5
2.0
2.5
1.0
4.5
25
200
TYP.
Objective specification
MAX.
V
V
V
V
V
UNIT
A
A