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ADA4930-1YCPZ-R2 Datasheet(PDF) 7 Page - Analog Devices |
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ADA4930-1YCPZ-R2 Datasheet(HTML) 7 Page - Analog Devices |
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7 / 25 page  Data Sheet ADA4930-1/ADA4930-2 Rev. B | Page 7 of 25 ABSOLUTE MAXIMUM RATINGS Table 7. Parameter Rating Supply Voltage 5.5 V Power Dissipation See Figure 4 Storage Temperature Range −65°C to +125°C Operating Temperature Range −40°C to +105°C Lead Temperature (Soldering, 10 sec) 300°C Junction Temperature 150°C Stresses at or above those listed under Absolute Maximum Ratings may cause permanent damage to the product. This is a stress rating only; functional operation of the product at these or any other conditions above those indicated in the operational section of this specification is not implied. Operation beyond the maximum operating conditions for extended periods may affect product 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/JESD51-7. Table 8. Thermal Resistance Package Type θJA Unit 16-Lead LFCSP (Exposed Pad) 98 °C/W 24-Lead LFCSP (Exposed Pad) 67 °C/W MAXIMUM POWER DISSIPATION The maximum safe power dissipation in the ADA4930-1/ ADA4930-2 packages 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 ADA4930-1/ADA4930-2. 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 the sum of the quiescent power dissipation and the power dissipated in the package due to the load drive. The quiescent power is the voltage between the supply pins (VS) times the quiescent current (IS). The power dissipated due to the load drive depends upon the particular application. The power due to load drive is calculated by multiplying the load current by the associated voltage drop across the device. RMS voltages and currents must be used in these calculations. 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 θJA. Figure 4 shows the maximum safe power dissipation vs. the ambient temperature for the ADA4930-1 single 16-lead LFCSP (98°C/W) and the ADA4930-2 dual 24-lead LFCSP (67°C/W) on a JEDEC standard 4-layer board. 3.5 0 –40 110 90 100 TEMPERATURE (°C) 0.5 1.0 1.5 2.0 2.5 3.0 –30 –20 –10 0 1020 304050 607080 ADA4930-2 ADA4930-1 Figure 4. Maximum Power Dissipation vs. Ambient Temperature, 4-Layer Board ESD CAUTION |
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