C8051F352 Datasheet, PDF (59/234 Pages) Silicon Laboratories – 8 k ISP Flash MCU Family

C8051F350/1/2/3
5.6. Analog Multiplexer
ADC0 includes analog multiplexer circuitry with independent selection capability for the AIN+ and AIN–
inputs. Each input can be connected to one of ten possible input sources: AIN0.0 though AIN0.7, AGND, or
the on-chip temperature sensor circuitry (Figure 5.5). The ADC0MUX register (SFR Definition 5.22) con-
trols the input mux selection for both input channels. The multiplexer configuration allows for measurement
of single-ended or differential signals. A single-ended measurement can be performed by connecting one
of the ADC inputs to AGND. Additionally, the temperature sensor can be measured in single-ended or dif-
ferential mode. The temperature sensor is automatically enabled when it is selected with the ADC multi-
plexer. See Section “8. Temperature Sensor’ on page 77 for more details on the temperature sensor.
Temperature
Sensor
Temp+
Temp-
AIN0.0
AIN0.1
AIN0.2
AIN0.3
AIN0.4
AIN0.5
AIN0.6
AIN0.7
AGND
AIN0.0
AIN0.1
AIN0.2
AIN0.3
AIN0.4
AIN0.5
AIN0.6
AIN0.7
ADC0MUX
AIN+
ADC0
AIN-
AGND
Figure 5.5. ADC0 Multiplexer Connections
Rev. 1.1
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