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AD8383ACPZ Datasheet(PDF) 5 Page - Analog Devices |
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AD8383ACPZ Datasheet(HTML) 5 Page - Analog Devices |
5 / 16 page AD8383 Rev. 0 | Page 5 of 16 ABSOLUTE MAXIMUM RATINGS Table 2. AD8383 Stress Ratings Parameter Rating Supply Voltages AVCCx – AGNDx 18 V DVCC – DGND 4.5 V Input Voltages Maximum Digital Input Voltages DVCC + 0.5 V Minimum Digital Input Voltages DGND – 0.5 V Maximum Analog Input Voltages AVCC + 0.5 V Minimum Analog Input Voltages AGND – 0.5 V Internal Power Dissipation8 LFCSP Package @ 25°C Ambient 3.8 W Operating Temperature Range 0°C to 85°C Storage Temperature Range –65°C to +125°C Lead Temperature Range (Soldering 10 sec) 300°C Stresses above those listed under the 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 the absolute maximum ratings for extended periods may reduce device reliability. 8 48-Lead LFCSP Package: θJA = 26°C/W (Still Air): JEDEC STD, 4-layer board with 0 CFM airflow θJC = 20°C/W ψJB = 11.0°C/W in Still Air MAXIMUM POWER DISSIPATION Junction Temperature The maximum power that can be safely dissipated by the AD8383 is limited by its junction temperature. The maximum safe junction temperature for plastic encapsulated devices as determined by the glass transition temperature of the plastic is approximately 150°C. Exceeding this limit temporarily may cause a shift in the parametric performance due to a change in the stresses exerted on the die by the package. Exceeding a junction temperature of 175°C for an extended period can result in device failure. Overload Protection The AD8383 employs a 2-stage overload protection circuit that consists of an output current limiter and a thermal shutdown. The maximum current at any one output of the AD8383 is internally limited to 100 mA, average. In the event of a momen- tary short-circuit between a video output and a power supply rail (AVCC or AGND), the output current limit is sufficiently low to provide temporary protection. The thermal shutdown debiases the output amplifier when the junction temperature reaches the internally set trip point. In the event of an extended short-circuit between a video output and a power supply rail, the output amplifier current continues to switch between 0 mA and 100 mA typical with a period determined by the thermal time constant and the hysteresis of the thermal trip point. The thermal shutdown provides long- term protection by limiting the average junction temperature to a safe level. Operating Temperature Range Production testing guarantees a minimum thermal shutdown junction temperature (TJ) of at least 125°C. To ensure operation at TJ < 125°C, it is necessary to limit the maximum power dissipation as described in the Applications section. Exposed Paddle The die paddle must be soldered to AVCC for reliable electrical operation. See the Applications section for details regarding use of the exposed paddles to dissipate excess heat. ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the human body and test equipment and can discharge without detection. Although this product features proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance degradation or loss of functionality. |
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