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AMC131M01DFMR датащи(PDF) 19 Page - Texas Instruments |
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AMC131M01DFMR датащи(HTML) 19 Page - Texas Instruments |
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19 / 81 page ![]() TX IN Oscillator OOK Modulation Transmitter TX Signal Conditioning Envelope Detection RX Signal Conditioning Receiver RX OUT SiO2-Based Capacitive Reinforced Isolation Barrier Figure 8-1. Block Diagram of an Isolation Channel Figure 8-2 shows the concept of the on-off keying scheme. TX IN Carrier Signal Across the Isolation Barrier RX OUT Figure 8-2. OOK-Based Modulation Scheme 8.3.4 Input ESD Protection Circuitry Basic electrostatic discharge (ESD) circuitry protects the AMC131M01 inputs from ESD and overvoltage events in conjunction with external circuits and assemblies. Figure 8-3 shows a simplified representation of the ESD circuit. The protection for input voltages exceeding VHLDO_OUT can be modeled as a simple diode. AINnP AINnN HLDO_OUT HLDO_OUT To analog inputs Figure 8-3. Input ESD Protection Circuitry The AMC131M01 has an integrated negative charge pump that allows for input voltages below HGND with a unipolar supply. Consequently, shunt diodes between the inputs and HGND cannot be used to clamp excessive negative input voltages. Instead, the same diode that clamps overvoltage also clamps undervoltage at the www.ti.com AMC131M01 SBASA57 – SEPTEMBER 2023 Copyright © 2023 Texas Instruments Incorporated Submit Document Feedback 19 Product Folder Links: AMC131M01 |
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