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ADV7441A Fiches technique(PDF) 10 Page - Analog Devices |
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ADV7441A Fiches technique(HTML) 10 Page - Analog Devices |
10 / 28 page ADV7441A Rev. B | Page 10 of 28 ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE Table 5. Parameter Rating AVDD to AGND 2.2 V DVDD to DGND 2.2 V PVDD to PGND 2.2 V DVDDIO to DGND 4 V CVDD to CGND 2.2 V TVDD to TGND 4 V DVDDIO to AVDD −0.3 V to +3.6 V DVDDIO to TVDD −3.6 V to +3.6 V DVDDIO to DVDD −2 V to +2 V CVDD to DVDD −2 V to +0.3 V PVDD to DVDD −2 V to +0.3 V AVDD to CVDD −2 V to +2 V AVDD to PVDD −2 V to +2 V AVDD to DVDD −2 V to +0.3 V AVDD to TVDD −3.6 V to +0.3 V TVDD to DVDD −2 V to +2 V Digital Inputs Voltage to DGND DGND − 0.3 V to DVDDIO + 0.3 V Digital Outputs Voltage to DGND DGND − 0.3 V to DVDDIO + 0.3 V Analog Inputs Voltage to AGND AGND − 0.3 V to AVDD + 0.3 V Maximum Junction Temperature (TJ_MAX) 125°C Storage Temperature Range −65°C to +150°C Infrared Reflow, Soldering (20 sec) 260°C Table 6. Package Type ΨJT1 Unit 144-Lead LQFP (ST-144) 1.62 °C/W 1 Junction-to-package surface thermal resistance. PACKAGE THERMAL PERFORMANCE To reduce power consumption during ADV7441A operation, turn off unused ADCs. On a four-layer PCB that includes a solid ground plane, the value of θJA is 25.3°C/W. However, due to variations within the PCB metal and, therefore, variations in PCB heat conductivity, the value of θJA may differ for various PCBs. The most efficient measurement technique is to use the surface temperature of the package to estimate the die temperature, because this is not affected by the variance associated with the value of θJA. The maximum junction temperature (TJ_MAX) of 125°C must not be exceeded. The following equation calculates the junction temperature using the measured surface temperature of the package and applies only when no heat sink is used on DUT: TJ_MAX = TS + (ΨJT × WTOTAL) where: TS is the surface temperature of the package expressed in degrees Celsius. ΨJT is the junction-to-package surface thermal resistance. WTOTAL = {(AVDD × IAVDD) + (DVDD × IDVDD) + (DVDDIO × IDVDDIO) + (PVDD × IPVDD) + (CVDD × ICVDD) + (TVDD × ITVDD)}. Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational section of this specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Contact an Analog Devices, Inc., sales representative or send an e-mail to video.products@analog.com for more information on package thermal performance. ESD CAUTION |
Numéro de pièce similaire - ADV7441A |
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Description similaire - ADV7441A |
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