TMS320F28375DPZP datasheet(108/226 Pages) TI

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Table 8-8shows 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.

Table 8-8. Per-Channel Parasitic Capacitance

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

ADCINB01

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

1. The increased capacitance is due to VDAC functionality.

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 TMS320F2837xD Dual-Core

Microcontrollers Technical Reference Manual for more information.

The user should analyze the ADC input setting assuming worst-case initial conditions on Ch. This will require

assuming that Ch could start the S+H window completely charged to VREFHI or completely discharged to VREFLO.

When the ADC transitions from an odd-numbered channel to an even-numbered channel, or vice-versa, the

actual initial voltage on Ch will be close to being completely discharged to VREFLO. For even-to-even or odd-to-

odd channel transitions, the initial voltage on Ch will be close to the voltage of the previously converted channel.

TMS320F28379D, TMS320F28379D-Q1, TMS320F28378D, TMS320F28377D

TMS320F28377D-Q1, TMS320F28376D, TMS320F28375D, TMS320F28374D

SPRS880O – DECEMBER 2013 – REVISED FEBRUARY 2021

www.ti.com

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TMS320F28375DPZP Datasheet(PDF) 108 Page - Texas Instruments

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