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LM4040CIM3-2.0 Datasheet(PDF) 38 Page - Texas Instruments |
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LM4040CIM3-2.0 Datasheet(HTML) 38 Page - Texas Instruments |
38 / 67 page 38 LM4040-N, LM4040-N-Q1 SNOS633K – OCTOBER 2000 – REVISED JUNE 2016 www.ti.com Product Folder Links: LM4040-N LM4040-N-Q1 Submit Documentation Feedback Copyright © 2000–2016, Texas Instruments Incorporated Typical Applications (continued) 9.2.4 Protecting Op-Amp Input The bounding voltage is ±4 V with the 2.5-V LM4040-N (LM4040-N's reverse breakdown voltage + 3 diode VF). Figure 14. Protecting Op Amp Input 9.2.4.1 Design Requirements Limit the input voltage to the op-amp to ±4 V. 9.2.4.2 Detailed Design Procedure Similar to Bounded Amplifier, this design uses a LM4040-2.5 and three forward diode voltage drops to create a voltage clamp. The procedure for selecting the RS resistors, in this case 5 kΩ, is the same as Detailed Design Procedure. IR = (VIN+ – VIN- – VOUT) / R = (10 V – 2.5 V) / (RS1 + RS2) = 7.5 V / 10 kΩ = 0.750 mA (9) |
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