PPC5604BAMLL4R datasheet(74/109 Pages) NXP

tên linh kiện	PPC5604BAMLL4R

Giải thích chi tiết về linh kiện	Single issue, 32-bit CPU core complex (e200z0)

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MPC5604B/C Microcontroller Data Sheet, Rev. 15

Package pinouts and signal descriptions

NXP Semiconductors

Figure 21. Input equivalent circuit (extended channels)

A second aspect involving the capacitance network shall be considered. Assuming the three capacitances

CF, CP1 and CP2 are initially charged at the source voltage VA (refer to the equivalent circuit in Figure 20):

A charge sharing phenomenon is installed when the sampling phase is started (A/D switch close).

Figure 22. Transient behavior during sampling phase

In particular two different transient periods can be distinguished:

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

VA1

VA2

VCS

Voltage transient on CS

ΔV < 0.5 LSB

τ1 < (RSW + RAD) CS << ts

τ2 = RL (CS + CP1 + CP2)

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