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ADA4304-2ACPZ-R2 数据表(PDF) 4 Page - Analog Devices |
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ADA4304-2ACPZ-R2 数据表(HTML) 4 Page - Analog Devices |
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4 / 12 page ![]() ADA4304-2 Rev. 0 | Page 4 of 12 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Rating Supply Voltage 5.5 V Power Dissipation See Figure 3 Storage Temperature Range −65°C to +125°C Operating Temperature Range −40°C to +85°C Lead Temperature (Soldering, 10 sec) 300°C Junction Temperature 150°C 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. THERMAL RESISTANCE θJA is specified for the device (including exposed pad) soldered to a high thermal conductivity 2s2p circuit board, as described in EIA/JESD 51-7. Table 3. Thermal Resistance Package Type θJA Unit 16-Lead LFCSP (Exposed Pad) 98 °C/W Maximum Power Dissipation The maximum safe power dissipation in the ADA4304-2 package is limited by the associated rise in junction temperature (TJ) on the die. At approximately 150°C, which is the glass transition temperature, the plastic changes its properties. Even temporarily exceeding this temperature limit can change the stresses that the package exerts on the die, permanently shifting the parametric performance of the ADA4304-2. Exceeding a junction temperature of 150°C for an extended period can result in changes in the silicon devices, potentially causing failure. The power dissipated in the package (PD) is essentially equal to the quiescent power dissipation; the supply voltage (VS) times the quiescent current (IS). In Table 1, the maximum power dissipation of the ADA4304-2 can be calculated as PD (MAX) = 5.25 V × 105 mA = 551 mW Airflow increases heat dissipation, effectively reducing θJA. In addition, more metal directly in contact with the package leads/exposed pad from metal traces, through-holes, ground, and power planes reduces the θJA. Figure 3 shows the maximum safe power dissipation in the package vs. the ambient temperature for the 16-lead LFCSP (98°C/W) on a JEDEC standard 4-layer board. 0 0 100 AMBIENT TEMPERATURE (°C) 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 10 20 30 40 50 60 70 80 90 Figure 3. Maximum Power Dissipation vs. Temperature for a 4-Layer Board ESD CAUTION |
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