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EL5226IRZ Datasheet(PDF) 10 Page - Intersil Corporation |
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EL5226IRZ Datasheet(HTML) 10 Page - Intersil Corporation |
10 / 12 page 10 Block Diagram CHANNEL OUTPUTS Each of the channel outputs has a rail-to-rail buffer. This enables all channels to have the capability to drive to within 50mV of the power rails, (see Electrical Characteristics for details). When driving large capacitive loads, a series resistor should be placed in series with the output. (Usually between 5 Ω and 50 Ω). Each of the channels is updated on a continuous cycle, the time for the new data to appear at a specific output will depend on the exact timing relationship of the incoming data to this cycle. The best-case scenario is when the data has just been captured and then passed on to the output stage immediately; this can be as short as 48µs. In the worst-case scenario this will be 480µs for EL5226 and 576µs for EL5236, when the data has just missed the cycle. When a large change in output voltage is required, the change will occur in 2V steps, thus the requisite number of timing cycles will be added to the overall update time. This means that a large change of 16V can take between 4.8ms and 5.3ms for EL5226 and between 6.9ms to 7.48ms for EL5236 depending on the absolute timing relative to the update cycle. POWER DISSIPATION With the 30mA maximum continues output drive capability for each channel, it is possible to exceed the 125°C absolute maximum junction temperature. Therefore, it is important to calculate the maximum junction temperature for the application to determine if load conditions need to be modified for the part to remain in the safe operation. The maximum power dissipation allowed in a package is determined according to: where: •TJMAX = Maximum junction temperature •TAMAX = Maximum ambient temperature • θJA = Thermal resistance of the package •PDMAX = Maximum power dissipation in the package VOLTAGE SOURCES EIGHT CHANNEL MEMORY CONTROL IF I2C DATA IN I2C CLOCK IN OSCILLATOR INPUT/OUTPUT REFERENCE DECOUPLE REFERENCE LOW OUTL OUTK OUTJ OUTB OUTA REFERENCE HIGH OSCILLATOR SELECT FILTER STD/REG A0 PDMAX TJMAX - TAMAX Θ JA --------------------------------------------- = EL5226, EL5326 |
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