23.3 ADC signal descriptionsThe ADC module supports up to 4 pairs of differential inputs and up to 24 single-endedinputs.Each differential pair requires two inputs, DADPx and DADMx. The ADC also requiresfour supply/reference/ground connections.NOTEFor the number of channels supported on this device as well asinformation regarding other chip-specific inputs into the ADCblock, see the chip-specific ADC configuration information.Table 23-3. ADC signal descriptionsSignal Description I/ODADP3–DADP0 Differential Analog Channel Inputs IDADM3–DADM0 Differential Analog Channel Inputs IADn Single-Ended Analog Channel Inputs IVREFSH Voltage Reference Select High IVREFSL Voltage Reference Select Low IVDDA Analog Power Supply IVSSA Analog Ground I23.3.1 Analog Power (VDDA)The ADC analog portion uses VDDA as its power connection. In some packages, VDDA isconnected internally to VDD. If externally available, connect the VDDA pin to the samevoltage potential as VDD. External filtering may be necessary to ensure clean VDDA forgood results.23.3.2 Analog Ground (VSSA)The ADC analog portion uses VSSA as its ground connection. In some packages, VSSA isconnected internally to VSS. If externally available, connect the VSSA pin to the samevoltage potential as VSS.ADC signal descriptionsKL27 Sub-Family Reference Manual , Rev. 5, 01/2016340 Freescale Semiconductor, Inc.
