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KM4200 Datasheet(PDF) 7 Page - Fairchild Semiconductor |
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KM4200 Datasheet(HTML) 7 Page - Fairchild Semiconductor |
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7 / 11 page  General Description The KM4200 is a single supply, general purpose, voltage- feedback amplifier fabricated on a complementary bipolar process using a patent pending topography. It features a rail-to-rail output stage and is unity gain stable. Both gain bandwidth and slew rate are insensitive to temperature. The common mode input range extends to 300mV below ground and to 1.2V below Vs. Exceeding these values will not cause phase reversal. However, if the input voltage exceeds the rails by more than 0.5V, the input ESD devices will begin to conduct. The output will stay at the rail during this overdrive condition. The design uses a Darlington output stage. The out- put stage is short circuit protected and offers “soft” saturation protection that improves recovery time. The typical circuit schematic is shown in Figure 1. Figure 1: Typical Configuration At non-inverting gains other than G = +1, keep Rg below 1k Ω to minimize peaking; thus, for optimum response at a gain of +2, a feedback resistor of 1k Ω is recommended. Figure 2 illustrates the KM4200 frequency response with both 1k Ω and 2kΩ feedback resistors. Figure 2: Frequency Response vs. Rf Power Dissipation The maximum internal power dissipation allowed is directly related to the maximum junction temperature. If the maximum junction temperature exceeds 150°C, some reliability degradation will occur. If the maximum junction temperature exceeds 175°C for an extended time, device failure may occur. The KM4200 is short circuit protected. However, this may not guarantee that the maximum junction tem- perature (+150°C) is not exceeded under all conditions. Follow the maximum power derating curves shown in Figure 3 to ensure proper operation. Figure 3: Power Derating Curves Overdrive Recovery For an amplifier, an overdrive condition occurs when the output and/or input ranges are exceeded. The recovery time varies based on whether the input or output is overdriven and by how much the ranges are exceeded. The KM4200 will typically recover in less than 20ns from an overdrive condition. Figure 4 shows the KM4200 in an overdriven condition. + - 1/2 KM4200 Rf 0.01 µF 6.8 µF Out1 +In1 +Vs + Rg Frequency Reponse vs. Rf Frequency (MHz) 1 10 100 Rf = 2kΩ Rf = 1kΩ G = 2 RL = 2kΩ Vs = +5V Maximum Power Dissipation Ambient Temperature ( C) -50 -30 -10 10 30 50 70 90 0 0.5 1.0 1.5 2.0 SOIC-8 lead MSOP-8 lead KM4200 DATA SHEET REV. 1A February 2001 7 |
Similar Part No. - KM4200 |
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Similar Description - KM4200 |
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