參數(shù)資料
型號: TMC2069P7CG
廠商: Fairchild Semiconductor Corporation
英文描述: Demonstration Board for the TMC3003 DAC
中文描述: 演示板的TMC3003援
文件頁數(shù): 2/12頁
文件大?。?/td> 87K
代理商: TMC2069P7CG
TMC2069P7C
PRODUCT SPECIFICATION
2
P
0.25 dB/Div
-2.0 dB
0 dB
0 MHz
6 MHz
With 13.5 MHz SinX/X Roll-off
0 dB
With 13.5MHz SinX/X Roll-off
-50 dB
100 MHz
0 MHz
10 MHz
HAD=200 nSec
475 nSec
375 nSec
0 MHz
6 MHz
20 nSec/Div
Pass Band
Stop Band
2T Pulse
Group Delay
Functional Description
The TMC2069P7C is designed to demonstrate the perfor-
mance of the TMC3003 Digital to Analog converter. It also
offers an example of design practices that result in high-
quality video performance.
The TMC3003 is a high-speed triple 10-bit D/A converter
especially suited for video and graphics applications.
It offers 10-bit resolution, TTL-compatible inputs, low
power consumption, and requires only a single +5 Volt
power supply. It has single ended current output, SYNC and
BLANK control inputs, and a separate current source for
adding sync pulses to the Green D/A converter output. It is
ideal for generating analog RGB from digital RGB and
driving computer display and video monitors. Three speed
grades are available: 30, 50, and 80 Msps.
The DAC module can be plugged into the TMC2068P7C
decoder demonstration board to provide analog RGB or
YPbPr outputs for viewing the decoder performance. The
board can also be plugged into the 10-bit DICE line doubler
demonstration board from Genesis. The input for the
Genesis 10 bit line doubler board is being provided by the
TMC2067P7C 10 bit ADC demonstration board connected
to the TMC2068P7C decoder demonstration board.
A set of switches routes the triple DAC outputs to either the
VGA connector or the component video connectors. The
SYNC and BLANK signals to the triple DAC are required
for the VGA mode are disabled when the component video
output is required. The component video connectors provide
sync on green.
Setup Procedure
1.
To set up the output levels on the triple dac, place a digi-
tal NTSC unmodulated ramp that has peak white at the
digital level 824 and blanking at 240.
2.
The output analog levels should be 286 mV sync tip to
blank level and 1.0V sync tip to peak white. If the output
levels are incorrect, adjust the GREEN output using the
potentiometer RV1.
3.
Apply either the unmodulated digital ramp used in step
1 to the red and blue inputs to adjust the Pb/BLUE and
Pr/RED outputs or apply SMPTE color bars and mea-
sure the Pb and Pr outputs.
4.
Adjust RV2, to adjust the RED, and RV3, to adjust the
BLUE output.
a.
If using the unmodulated ramp, match the output
voltage levels to the values on the green channel.
b.
If using the SMPTE color bars, the level of Pb and
Pr peak to peak should be 525 mV.
Figure 2. Unmodulated Ramp Waveform
1.0V
286 mV
Figure 1. Output Low Pass Filters
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