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LME49610 Datasheet(PDF) 11 Page - Texas Instruments |
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LME49610 Datasheet(HTML) 11 Page - Texas Instruments |
11 / 21 page Q2 Q1 200: Q3 Q4 Q5 Q6 OUT VCC VEE Thermal Shutdown IN BW D1 - D7 D8 - D14 LME49610 www.ti.com SNAS435B – APRIL 2008 – REVISED APRIL 2013 For example, the LME49610’s output voltage can slew at a typical 2000V/ μs. When driving a 100Ω load, the di/dt current demand is 20 A/ μs. This current flowing through an inductance of 50nH (approximately 1.5” of 22 gage wire) will produce a 1V transient. In these and similar situations, place the parallel combination of a solid 5 μF to 10 μF tantalum capacitor and a ceramic 0.1μF capacitor as close as possible to the device supply pins. Ceramic capacitor have very lower ESR (typically less than 10m Ω) and low ESL when compared to the same valued tantalum capacitor. The ceramic capacitors, therefore, have superior AC performance for bypassing high frequency noise. In less demanding applications that have lighter loads or lower slew rates, the supply bypassing is not as critical. Capacitor values in the range of 0.01 μF to 0.1μF are adequate. SIMPLIFIED LME49610 CIRCUIT DIAGRAM The LME49610’s simplified circuit diagram is shown in Figure 29. The diagram shows the LME49610’s complementary emitter follower design, bias circuit and bandwidth adjustment node. Figure 29. Simplified Circuit Diagram Figure 30 shows the LME49610 connected as an open-loop buffer. The source impedance and optional input resistor, RS, can alter the frequency response. As previously stated, the power supplies should be bypassed with capacitors connected close to the LME49610’s power supply pins. Capacitor values as low as 0.01 μF to 0.1μF will ensure stable operation in lightly loaded applications, but high output current and fast output slewing can demand large current transients from the power supplies. Place a recommended parallel combination of a solid tantalum capacitor in the 5 μF to 10μF range and a ceramic 0.1μF capacitor as close as possible to the device supply pins. Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: LME49610 |
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