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THS4031CDR Datasheet(PDF) 25 Page - Texas Instruments |
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THS4031CDR Datasheet(HTML) 25 Page - Texas Instruments |
25 / 47 page + _ THS403x CLOAD 360 Ω Input Output 360 Ω 20 Ω THS4031 THS4032 www.ti.com SLOS224G – JULY 1999 – REVISED MARCH 2010 DRIVING A CAPACITIVE LOAD Driving capacitive loads with high-performance amplifiers is not a problem as long as certain precautions are taken. The first is to realize that the THS403x has been internally compensated to maximize its bandwidth and slew-rate performance. When the amplifier is compensated in this manner, capacitive loading directly on the output will decrease the phase margin of the device leading to high-frequency ringing or oscillations. Therefore, for capacitive loads of greater than 10 pF, it is recommended that a resistor be placed in series with the output of the amplifier, as shown in Figure 55. A minimum value of 20 Ω should work well for most applications. For example, in 75- Ω transmission systems, setting the series resistor value to 75 Ω both isolates any capacitance loading and provides the proper line impedance matching at the source end. Figure 55. Driving a Capacitive Load Copyright © 1999–2010, Texas Instruments Incorporated Submit Documentation Feedback 25 Product Folder Link(s): THS4031 THS4032 |
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