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ADC32RF44 数据表(PDF) 21 Page - Texas Instruments |
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ADC32RF44 数据表(HTML) 21 Page - Texas Instruments |
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21 / 128 page  VCM INxP INxM RDC / 2 RDC / 2 ADC32RFxx IDIFF To Analog Buffer To Analog Buffer Clamp Circuit Copyright © 2017, Texas Instruments Incorporated Input Vcm INP INM +337.5 mV ±337.5 mV +600 mV ±600 mV 675 mVPP for INP and INM (1.35 VPP Differentially) 21 ADC32RF42 www.ti.com SBAS844 – MAY 2017 Product Folder Links: ADC32RF42 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated Feature Description (continued) 9.3.1.1 Input Clamp Circuit The ADC32RF42 analog inputs include an internal, differential clamp for overvoltage protection. As shown in Figure 38 and Figure 39, the clamp triggers for any input signals at approximately 600 mV above the input common-mode voltage, effectively limiting the maximum input signal to approximately 2.4 VPP. When the clamp circuit conducts, the maximum differential current flowing through the circuit (via input pins) must be limited to 20 mA. Figure 38. Clamp Circuit in the ADC32RF42 Figure 39. Clamp Response Timing Diagram |
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