Table 343. Sar Adc External Signal Description - STMicroelectronics SPC572L series Reference Manual

RM0400
The following sections describe configuration details:
•
Section 34.2.2.1, SAR ADC external signal description
•
Section 34.2.2.2, SAR ADC integration diagram
•
Section 34.2.2.3, SAR ADC analog input pin multiplexing
•
Section 34.2.2.4, SAR ADC clock sources
•
Section 34.2.2.5, SAR ADC triggering
•
Section 34.2.2.6, SAR ADC alternate reference
•
Section 34.2.2.7, SAR absolute voltage reference
•
Section 34.2.2.8, SAR ADC diagnostic
• Section 34.2.2.9, SAR ADC channel assignment
•
Section 34.2.2.10, SAR ADC register definitions
For detailed module information, refer to the Successive Approximation Register Analog-to-
Digital Converter (SARADC) Digital Interface chapter.
34.2.2.1 SAR ADC external signal description
The external package pins connecting to the SAR ADC modules on the device are defined
in Table 343.
Signal name
AN[n] (see Table 310)
AN[4:6]
AN[7]
VDD_HV_ADV
VSS_HV_ADV
VDD_HV_ADR
VSS_HV_ADR
DECODE_EXTCH[2:0]
34.2.2.2 SAR ADC integration diagram
Figure 307
SPC572Lx.
SAR ADCB implements a Bias Generator converting the 3/3 × (V
V
SS_HV_ADR
V
SS_HV_ADR
ADC block diagram in the Successive Approximation Register Analog-to-Digital Converter
(SARADC) Digital Interface chapter.

Table 343. SAR ADC external signal description

Signal type Signal voltage
Analog input 0–5 V
Analog input 0–5 V
Analog input 0–5 V
Analog supply 5 V
Analog ground 0 V
Analog supply 2–5 V
Analog ground 0 V
Digital output 0–5 V
shows the block diagram of the integration of the three SAR ADCs on
), 2/3 × (V
DD_HV_ADR
reference points through the internal 20 kΩ source impedance. See the SAR
DocID027809 Rev 4
Analog-to-digital converter (ADC) configuration
Single-Ended Analog Input with Pull Up/Down
Single-Ended Analog Input with no alternate reference
selection allowed
Single-Ended Analog Input with no alternate reference
selection allowed, and switch to ground safety feature
SAR ADC Power Supply
SAR ADC Ground Supply
SAR ADC Reference
SAR ADC Ground Reference
SAR ADC0 External Mux Address Output
– V ), 1/3 × (V
SS_HV_ADR
Description
–
DD_HV_ADR
– V
DD_HV_ADR SS_HV_ADR
), and
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