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ISL28291FUZ データシート(PDF) 11 Page - Intersil Corporation |
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ISL28291FUZ データシート(HTML) 11 Page - Intersil Corporation |
11 / 16 page 11 FN6156.5 February 20, 2008 reduce the risk of oscillation. The combination of a 4.7µF tantalum capacitor in parallel with a 0.01µF capacitor has been shown to work well when placed at each supply pin. For good AC performance, parasitic capacitance should be kept to a minimum, especially at the inverting input. When ground plane construction is used, it should be removed from the area near the inverting input to minimize any stray capacitance at that node. Carbon or Metal-Film resistors are acceptable with the Metal-Film resistors giving slightly less peaking and bandwidth because of additional series inductance. Use of sockets, particularly for the SOIC package, should be avoided if possible. Sockets add parasitic inductance and capacitance, which will result in additional peaking and overshoot. Current Limiting The ISL28191 and ISL28291 have no internal current-limiting circuitry. If the output is shorted, it is possible to exceed the Absolute Maximum Rating for output current or power dissipation, potentially resulting in the destruction of the device. This is why the output short circuit current is specified and tested with RL = 10Ω. Power Dissipation It is possible to exceed the +125°C maximum junction temperatures under certain load and power-supply conditions. It is therefore important to calculate the maximum junction temperature (TJMAX) for all applications to determine if power supply voltages, load conditions, or package type need to be modified to remain in the safe operating area. These parameters are related in Equation 1: where: •PDMAXTOTAL is the sum of the maximum power dissipation of each amplifier in the package (PDMAX) •PDMAX for each amplifier can be calculated in Equation 2: where: •TMAX = Maximum ambient temperature • θ JA = Thermal resistance of the package •PDMAX = Maximum power dissipation of 1 amplifier •VS = Supply voltage •IMAX = Maximum supply current of 1 amplifier •VOUTMAX = Maximum output voltage swing of the application •RL = Load resistance T JMAX T MAX θ JAxPDMAXTOTAL () + = (EQ. 1) PD MAX 2*V S I SMAX V S ( - V OUTMAX ) V OUTMAX R L ---------------------------- × + × = (EQ. 2) ISL28191, ISL28291 |
同様の部品番号 - ISL28291FUZ |
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同様の説明 - ISL28291FUZ |
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