IMX93CEC datasheet(48/123 Pages) NXP

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[8] ENOB can be lower than shown, if an ADC channel corrupts other ADC channels through capacitive coupling. This coupling may be dominated by board parasitics.

Care must be taken not to corrupt the desired channel being measured. This coupling becomes worse at higher analog frequencies and with switching waveforms

due to the harmonic content.

Figure 20. Sample time vs RAS

4.11.2 12-bit ADC input impedance equivalent circuit diagram

There is an additional RIOMUX of 350 Ω (from 295 Ω to 405 Ω) resistance if an input goes through the MUX inside the IO and CP

of 2.5 pF as shown in Figure 21.

To calculate the sample request time, using the following equation where RADCtotal = RADIN + RIOMUX, RIOMUX = 350 Ω, CP = 2.5

pF and B = 11 for 1/4 LSB settling.

Tsmp_req = B [RAS (CAS + CP + CADIN) + (RAS + RADCtotal) CADIN]

NXP Semiconductors

IMX93CEC

i.MX 93 Applications Processors Data Sheet for Commercial Products

IMX93CEC

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 7 — 12 February 2026

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