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LMC6034IM Datasheet(PDF) 5 Page - National Semiconductor (TI) |
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LMC6034IM Datasheet(HTML) 5 Page - National Semiconductor (TI) |
5 / 12 page Typical Performance Characteristics V S = ±7.5V, TA = 25˚C unless otherwise specified (Continued) Applications Hint Amplifier Topolgy The topology chosen for the LMC6034, shown in Figure 1,is unconventional (compared to general-purpose op amps) in that the traditional unity-gain buffer output stage is not used; instead, the output is taken directly from the output of the in- tegrator, to allow a larger output swing. Since the buffer tra- ditionally delivers the power to the load, while maintaining high op amp gain and stability, and must withstand shorts to either rail, these tasks now fall to the integrator. As a result of these demands, the integrator is a compound affair with an embedded gain stage that is doubly fed forward (via C f and Cff) by a dedicated unity-gain compensation driver. In addition, the output portion of the integrator is a push-pull configuration for delivering heavy loads. While sinking current the whole amplifier path consists of three gain stages with one stage fed forward, whereas while sourcing the path contains four gain stages with two fed forward. Output Characteristics Current Sourcing DS011134-27 Input Voltage Noise vs Frequency DS011134-28 CMRR vs Frequency DS011134-29 Open-Loop Frequency Response DS011134-30 Frequency Response vs Capacitive Load DS011134-31 Non-Inverting Large Signal Pulse Response DS011134-32 Stability vs Capacitive Load DS011134-33 Stability vs Capacitive Load DS011134-34 Note: Avoid resistive loads of less than 500 Ω, as they may cause instability. www.national.com 5 |
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