LQFP64 datasheet(82/116 Pages) STMICROELECTRONICS

82 / 116 page

Package pinouts and signal descriptions

SPC560B40x/50x, SPC560C40x/50x

82/116

DocID14619 Rev 13

Figure 19. Input equivalent circuit (precise channels)

Figure 20. Input equivalent circuit (extended channels)

RSW1

CP2

VDD

Sampling

Source

Filter

Current Limiter

EXTERNAL CIRCUIT

INTERNAL CIRCUIT SCHEME

CP1

RAD

Channel

Selection

RS: Source impedance

RF: Filter resistance

CF: Filter capacitance

RL: Current limiter resistance

RSW1: Channel selection switch impedance

RAD: Sampling switch impedance

CP: Pin capacitance (two contributions, CP1 and CP2)

CS: Sampling capacitance

RSW1

CP3

VDD

Sampling

Source

Filter

Current Limiter

EXTERNAL CIRCUIT

INTERNAL CIRCUIT SCHEME

CP1

RAD

Channel

Selection

CP2

Extended

RSW2

Switch

RS: Source impedance

RF: Filter resistance

CF: Filter capacitance

RL: Current limiter resistance

RSW1: Channel selection switch impedance (two contributions, RSW1 and RSW2)

RAD: Sampling switch impedance

CP: Pin capacitance (two contributions, CP1, CP2 and CP3)

CS: Sampling capacitance

LQFP64 Datasheet(PDF) 82 Page - STMicroelectronics

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