RPC564L60L5BFSR datasheet(104/137 Pages) STMICROELECTRONICS

部品番号	RPC564L60L5BFSR

部品情報	microcontroller for Aerospace and Defense, SIL3/ASILD safety applications

PDF	137 Pages

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メーカー	STMICROELECTRONICS [STMicroelectronics]

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104 / 137 page

Electrical characteristics

RPC56EL60L5

104/137

DocID026934 Rev 1

Equation 4:

Equation 4 generates a constraint for external network design, in particular on resistive path.

Internal switch resistances (RSW and RAD) can be neglected with respect to external

resistances.

Figure 8. Input Equivalent Circuit

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 reported in Figure 8): A charge sharing phenomenon is installed when the

sampling phase is started (A/D switch close).

---------------------



---LSB



RSW1

CP2

VDD

Sampling

Source

Filter

Current Limiter

EXTERNAL CIRCUIT

INTERNAL CIRCUIT SCHEME

RS Source Impedance

RF Filter Resistance

CF Filter Capacitance

RL Current Limiter Resistance

RSW1 Channel Selection Switch Impedance

RADSampling Switch Impedance

CP Pin Capacitance (two contributions, CP1 and CP2)

CS Sampling Capacitance

CP1

RAD

Channel

Selection

RPC564L60L5BFSR データシート(PDF) 104 Page - STMicroelectronics

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