SPRSP14E may 2019 – june 2023 TMS320F28384D , TMS320F28384D-Q1 , TMS320F28384S , TMS320F28384S-Q1 , TMS320F28386D , TMS320F28386D-Q1 , TMS320F28386S , TMS320F28386S-Q1 , TMS320F28388D , TMS320F28388S
PRODUCTION DATA
Table 7-12 lists the parasitic capacitance on each channel. Also, enabling a comparator adds approximately 1.4 pF of capacitance on positive comparator inputs and 2.5 pF of capacitance on negative comparator inputs.
ADC CHANNEL | Cp (pF) | |
---|---|---|
COMPARATOR DISABLED | COMPARATOR ENABLED | |
ADCINA0 | 12.9 | N/A |
ADCINA1 | 10.3 | N/A |
ADCINA2 | 5.9 | 7.3 |
ADCINA3 | 6.3 | 8.8 |
ADCINA4 | 5.9 | 7.3 |
ADCINA5 | 6.3 | 8.8 |
ADCINB0(1) | 117.0 | N/A |
ADCINB1 | 10.6 | N/A |
ADCINB2 | 5.9 | 7.3 |
ADCINB3 | 6.2 | 8.7 |
ADCINB4 | 5.2 | N/A |
ADCINB5 | 5.1 | N/A |
ADCINC2 | 5.5 | 6.9 |
ADCINC3 | 5.8 | 8.3 |
ADCINC4 | 5.0 | 6.4 |
ADCINC5 | 5.3 | 7.8 |
ADCIND0 | 5.3 | 6.7 |
ADCIND1 | 5.7 | 8.2 |
ADCIND2 | 5.3 | 6.7 |
ADCIND3 | 5.6 | 8.1 |
ADCIND4 | 4.3 | N/A |
ADCIND5 | 4.3 | N/A |
ADCIN14 | 8.6 | 10.0 |
ADCIN15 | 9.0 | 11.5 |
These input models should be used along with actual signal source impedance to determine the acquisition window duration. See the Choosing an Acquisition Window Duration section of the TMS320F2838x Real-Time Microcontrollers Technical Reference Manual for more information. See also the Charge-Sharing Driving Circuits for C2000 ADCs (using TINA-TI simulation tool) Application Note and the ADC Input Circuit Evaluation for C2000 MCUs (using TINA-TI simulation tool) Application Note.