The ADC input
characteristics are given by Table 6-13 and Figure 6-44.
Table 6-13 Input Model Parameters This input model should be used with actual signal source impedance to
determine the acquisition window duration. For more information, see the
Choosing an Acquisition Window Duration section of the Analog-to-Digital
Converter (ADC) chapter in the TMS320F28003x Real-Time
Microcontrollers Technical Reference Manual. For
recommendations on improving ADC input circuits, see the ADC Input Circuit
Evaluation for C2000 MCUs Application Report.
Table 6-14 Per-Channel Parasitic
Capacitance for 100-Pin PZ LQFP
ADC CHANNEL |
Cp (pF) |
COMPARATOR
DISABLED |
COMPARATOR
ENABLED |
A0/B15/C15/DACA_OUT |
9.1 |
11.6 |
A1/B7/DACB_OUT |
7.4 |
9.9 |
A2/B6/C9 |
4.1 |
6.6 |
A3 |
3.3 |
5.8 |
A4/B8 |
3.8 |
6.3 |
A5 |
3.5 |
6 |
A6 |
3.2 |
5.7 |
A7/C3 |
3.8 |
6.3 |
A8 |
4.1 |
6.6 |
A9 |
3.1 |
5.6 |
A10/B1/C10 |
4.7 |
7.2 |
A11/B11/C0 |
4 |
6.5 |
A12 |
3.4 |
5.9 |
A14/B14/C4 |
3.8 |
6.3 |
B0/C11 |
4.1 |
6.6 |
B2/C6 |
3.9 |
6.4 |
B3/VDAC |
75 |
77.5 |
B4/C8 |
3.8 |
6.3 |
B5 |
3.5 |
6 |
B9/C7 |
3.3 |
5.8 |
B11 |
3 |
5.5 |
B12/C2 |
3.6 |
6.1 |
C1 |
3 |
5.5 |
C5 |
3.6 |
6.1 |
C14 |
4.2 |
6.7 |
AGPIO_B5 |
3.2 |
5.7 |
AGPIO_B11 |
3.1 |
5.6 |
Table 6-15 Per-Channel Parasitic
Capacitance for 80-Pin PN LQFP
ADC CHANNEL |
Cp (pF) |
COMPARATOR
DISABLED |
COMPARATOR
ENABLED |
A0/B15/C15/DACA_OUT |
9.1 |
11.6 |
A1/B7/DACB_OUT |
7.4 |
9.9 |
A2/B6/C9 |
4.1 |
6.6 |
A3/B3/C5/VDAC |
81.9 |
89.4 |
A4/B8/C14 |
8 |
13 |
A5/B12/C2 |
7.1 |
12.1 |
A6 |
3.2 |
5.7 |
A7/C3 |
3.8 |
6.3 |
A8/B0/C11 |
8.2 |
13.2 |
A9/B4/C8 |
6.9 |
11.9 |
A10/B1/C10 |
4.7 |
7.2 |
A11/B11/C0 |
4 |
6.5 |
A12/C1 |
6.4 |
11.4 |
A14/B14/C4 |
3.8 |
6.3 |
A15/B9/C7 |
7.1 |
12.1 |
B2/C6 |
3.9 |
6.4 |
AGPIO_B5 |
3.2 |
5.7 |
AGPIO_B11 |
3.1 |
5.6 |
Table 6-16 Per-Channel Parasitic
Capacitance for 64-Pin PM LQFP
ADC CHANNEL |
Cp (pF) |
COMPARATOR
DISABLED |
COMPARATOR
ENABLED |
A0/B15/C15/DACA_OUT |
9.1 |
11.6 |
A1/B7/DACB_OUT |
7.4 |
9.9 |
A2/B6/C9 |
4.1 |
6.6 |
A3/B3/C5/VDAC |
81.9 |
89.4 |
A4/B8/C14 |
8 |
13 |
A5/B12/C2 |
7.1 |
12.1 |
A6 |
3.2 |
5.7 |
A7/C3 |
3.8 |
6.3 |
A8/B0/C11 |
8.2 |
13.2 |
A9/B4/C8 |
6.9 |
11.9 |
A10/B1/C10 |
4.7 |
7.2 |
A11/B11/C0 |
4 |
6.5 |
A12/C1 |
6.4 |
11.4 |
A14/B14/C4 |
3.8 |
6.3 |
A15/B9/C7 |
7.1 |
12.1 |
B2/C6 |
3.9 |
6.4 |
Table 6-17 Per-Channel Parasitic
Capacitance for 48-Pin PT LQFP
ADC CHANNEL |
Cp (pF) |
COMPARATOR
DISABLED |
COMPARATOR
ENABLED |
A0/B15/C15/DACA_OUT |
9.1 |
11.6 |
A1/B7/DACB_OUT |
7.4 |
9.9 |
A2/B6/C9 |
4.1 |
6.6 |
A3/B3/C5/VDAC |
81.9 |
89.4 |
A4/B8/C14 |
8 |
13 |
A5/B12/C2 |
7.1 |
12.1 |
A6/B2/C6 |
7.1 |
12.1 |
A7/C3 |
3.8 |
6.3 |
A8/B0/C11 |
8.2 |
13.2 |
A9/B4/C8 |
6.9 |
11.9 |
A10/B1/C10 |
4.7 |
7.2 |
A11/B11/C0 |
4 |
6.5 |
A12/C1 |
6.4 |
11.4 |
A15/B9/C7 |
7.1 |
12.1 |