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SPC584CX Datenblatt(PDF) 47 Page - STMicroelectronics

Teilenummer SPC584CX
Bauteilbeschribung  SPC58 C Line - 32 bit Power Architecture automotive MCU Dual z4 cores 180 MHz, 4 MBytes Flash, HSM, ASIL-B
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SPC584Cx, SPC58ECx
Electrical characteristics
55
4.12
ADC system
4.12.1
ADC input description
Figure 8
shows the input equivalent circuit for SARn and SARB channels.
Figure 8. Input equivalent circuit (Fast SARn and SARB channels)
All specifications in the following table are valid for the full input voltage range for the analog
inputs.
RSW1
CP2
CS
VDD
Sampling
INTERNAL CIRCUIT SCHEME
RSW1: Channel Selection Switch Impedance
RAD:
Sampling Switch Impedance
CP:
Pin Capacitance (two contributions, CP1 and CP2)
CS:
Sampling Capacitance
RCMSW: Common mode switch
RCMRL: Common mode resistive ladder
VCM:
Common mode voltage (~0.5 VDD)
CEXT: External capacitance
CP1
RAD
Channel
Selection
Common mode
switch
Common mode
resistive ladder
The above scheme can be used as approximation circuitry for external filtering definition.
VCM
RCMSW
RCMRL
CEXT
VSS_HV_ADR
Table 26. ADC pin specification
Symbol
C
Parameter
Conditions
Value
Unit
Min
Max
R20KΩ
CC D
Internal voltage reference source
impedance.
—16
30
K
Ω
ILKG
CC —
Input leakage current, two ADC
channels on input-only pin.
See IO chapter Table 11: I/O input electrical
characteristics
, parameter ILKG.
IINJ1
SR —
Injection current on analog input
preserving functionality at full or
degraded performances.
See Operating Conditions chapter Table 5:
Operating conditions
, IINJ1 parameter.
CHV_ADC
SR D VDD_HV_ADV external capacitance.
See Power Management chapter Table 34: External
components integration
, CADC parameter.
CP1
CC D Pad capacitance
See IO chapter Table 11: I/O input electrical
characteristics
, parameter CP1.



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