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LPC5410X Datasheet(PDF) 74 Page - NXP Semiconductors |
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LPC5410X Datasheet(HTML) 74 Page - NXP Semiconductors |
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74 / 95 page  LPC5410x All information provided in this document is subject to legal disclaimers. © NXP B.V. 2019. All rights reserved. Product data sheet Rev. 2.11 — 19 September 2019 74 of 95 NXP Semiconductors LPC5410x 32-bit ARM Cortex-M4/M0+ microcontroller 12.2.1 ADC input impedance Figure 25 shows the ADC input impedance. In this figure: • ADCx represents slow ADC input channels 6 to 11. • ADCy represents fast ADC input channels 0 to 5. • R1 and Rsw are the switch-on resistance on the ADC input channel. • If fast channels (ADC inputs 0 to 5) are selected, the ADC input signal goes through Rsw to the sampling capacitor (Cia). • If slow channels (ADC inputs 6 to 11) are selected, the ADC input signal goes through R1 + Rsw to the sampling capacitor (Cia). • Typical values, R1 = 487 , Rsw = 278 • See Table 16 for Cio. • See Table 31 for Cia. Fig 25. ADC input impedance DAC ADC Rsw R1 Cia ADCx ADCy Cio Cio aaa-017600 |
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