The recommended power-up sequence is to apply power to the analog power pins (VAA, VCC, and VDD) first, followed by the digital power pins (VDDIO and VDDC). This ensures that the analog circuits are powered up before the digital circuits.
The TVP5145 can be configured for different video input formats using the I2C interface. The device has a set of registers that control the video input format, such as the input standard, clock frequency, and data format. Refer to the datasheet for the specific register settings for each format.
The TVP5145 supports clock frequencies up to 74.25 MHz for SD/HD video inputs and up to 148.5 MHz for 3G-SDI video inputs.
The TVP5145 has a thermal shutdown feature that shuts down the device when the junction temperature exceeds 150°C. To handle this feature, ensure that the device is properly heat-sunk and that the thermal shutdown pin (TSD) is connected to a pull-up resistor to the power supply. The device will automatically restart when the junction temperature drops below 140°C.
The recommended layout and routing for the TVP5145 involves keeping the analog and digital power pins separate, using a solid ground plane, and minimizing the length of the clock and data lines. Refer to the datasheet for specific layout and routing guidelines.
TVP5145PFPG4 datasheet
by Texas Instruments
