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KM4120 数据表(PDF) 8 Page - Fairchild Semiconductor |
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KM4120 数据表(HTML) 8 Page - Fairchild Semiconductor |
8 / 11 page DATA SHEET KM4110/KM4120 8 REV. 1A February 2001 Figure 4: Overdrive Recovery Driving Capacitive Loads The Frequency Response vs. CL plot on page 4, illustrates the response of the KM4110 and KM4120. A small series resistance (Rs) at the output of the amplifier, illustrated in Figure 5, will improve stability and settling performance. Rs values in the Frequency Response vs. CL plot were chosen to achieve maximum bandwidth with less than 1dB of peaking. For maximum flatness, use a larger Rs. Figure 5: Typical Topology for driving a capacitive load Layout Considerations General layout and supply bypassing play major roles in high frequency performance. Fairchild has evaluation boards to use as a guide for high frequency layout and to aid in device testing and characterization. Follow the steps below as a basis for high frequency layout: s Include 6.8 µF and 0.01µF ceramic capacitors s Place the 6.8 µF capacitor within 0.75 inches of the power pin s Place the 0.01 µF capacitor within 0.1 inches of the power pin s Remove the ground plane under and around the part, especially near the input and output pins to reduce parasitic capacitance s Minimize all trace lengths to reduce series inductances Refer to the evaluation board layouts shown in Figure 7 for more information. Evaluation Board Information The following evaluation boards are available to aid in the testing and layout of this device: Evaluation board schematics and layouts are shown in Figure 6 and Figure 7. The KEB002 evaluation board is built for dual supply operation. Follow these steps to use the board in a single supply application: 1. Short -Vs to ground 2. Use C3 and C4, if the -Vs pin of the KM4110 or KM4120 is not directly connected to the ground plane. Figure 6: Evaluation Board Schematic Time (200ns/div) G = 5 Output Input + - Rf Rg Rs CL RL Eval Board Description Products KEB002 Single Channel, KM4110IT5, Dual Supply 5 & 6 lead SOT23 KM4120IT6 |
类似零件编号 - KM4120 |
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类似说明 - KM4120 |
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