Datasheet

Figure 18-9. ADC Conversion Result
0xFFF
V
IN
0xC00
0x800
0x400
VREFN
VREFP
½ (VREFP - VREFN)
¼ (VREFP - VREFN)
¾ (VREFP - VREFN)
- Input Saturation
18.3.5 Differential Sampling
In addition to traditional single-ended sampling, the ADC module supports differential sampling of
two analog input channels. To enable differential sampling, software must set the Dn bit in the
ADCSSCTL0n register in a step's configuration nibble.
When a sequence step is configured for differential sampling, the input pair to sample must be
configured in the ADCSSMUXn register. Differential pair 0 samples analog inputs 0 and 1; differential
pair 1 samples analog inputs 2 and 3; and so on (see Table 18-5 on page 1213). The ADC does not
support other differential pairings such as analog input 0 with analog input 3.
Table 18-5. Differential Sampling Pairs
Analog InputsDifferential Pair
0 and 10
2 and 31
4 and 52
6 and 73
8 and 94
10 and 115
12 and 136
1213December 13, 2013
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TM4C129XNCZAD Microcontroller