TMC2069P7CG

www.fairchildsemi.com TMC2069P7C Demonstration Board for the TMC3003 DAC Features • Parallel TTL Compatible Inputs • Component and VGA Outputs • Fairchild demo board compatibility Description The TMC2069P7C DAC demonstration board provides a flexible base for evaluating the performance of the TMC3003 triple 10 bit DAC. The board can output analog component video or VGA. There are high quality Hybrid filters (601-003) on the output. Applications • • • • Evaluation of TMC3003 DAC Output for TMC2068P7C Decoder demo board Output for Genesis 10-bit Line doubler board System Breadboarding Preliminary Information Block Diagram Analog RGB VGA Output +5V 0V -5V 96 Way Edge Connector (female) Digital Inputs: 10 bit G/Y 10 bit B/U 10 bit R/V DAC Clock SYNC BLANK TMC3003 1 High Quality LPF High Quality LPF High Quality LPF Analog RGB/YPbPr Video Output 32 Analog Outputs for the TMC22153 Digital Decoder Rev. 0.9.1 PRELIMINARY INFORMATION describes products that are not in full production at the time of printing. Specifications are based on design goals and limited characterization. They may change without notice. Contact Fairchild Semiconductor for current information. TMC2069P7C PRODUCT SPECIFICATION Functional Description The TMC2069P7C is designed to demonstrate the performance of the TMC3003 Digital to Analog converter. It also offers an example of design practices that result in highquality 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 digital NTSC unmodulated ramp that has peak white at the digital level 824 and blanking at 240. 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. 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 measure the Pb and Pr outputs. Adjust RV2, to adjust the RED, and RV3, to adjust the BLUE output. a. b. If using the unmodulated ramp, match the output voltage levels to the values on the green channel. If using the SMPTE color bars, the level of Pb and Pr peak to peak should be 525 mV. 2. 3. Preliminary Information 4. 1.0V 286 mV Figure 2. Unmodulated Ramp Waveform Pass Band 0 dB 0 dB Stop Band With 13.5 MHz SinX/X Roll-off 0.25 dB/Div With 13.5MHz SinX/X Roll-off -2.0 dB 0 MHz 6 MHz -50 dB 0 MHz 10 MHz 100 MHz 2T Pulse 475 nSec Group Delay 20 nSec/Div HAD=200 nSec 375 nSec 0 MHz 6 MHz Figure 1. Output Low Pass Filters 2 PRODUCT SPECIFICATION TMC2069P7C Power Supply Requirements The TMC2069P7C board requires 1.5 Amps from the +5 Volt power supply and 0.5 Amps from the -5 Volt power supply. The -5 Volt power supply powers the SMA filters. The +5 Volt power supply not only drives TTL logic devices but it also provides the power and voltage references to the TMC3003. Therefore, it is recommended that a bench power supply be used with the cable lengths kept to a minimum. The response at 5.0MHz typically varies