SPC5604PGF0MLL6 Freescale Semiconductor, SPC5604PGF0MLL6 Datasheet - Page 66

• Manufacturer Part Number: SPC5604PGF0MLL6
• Description: IC MCU 32BIT 512KB FLASH 100LQFP
• Manufacturer: Freescale Semiconductor
• Series: MPC56xx Qorivvar

Specifications of SPC5604PGF0MLL6

• Core Processor: e200z0h
• Core Size: 32-Bit
• Speed: 64MHz
• Connectivity: CAN, FlexRay, LIN, SPI, UART/USART
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 68
• Program Memory Size: 512KB (512K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 64K x 8
• Ram Size: 40K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 30x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 100-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

In fact a current sink contributor is represented by the charge sharing effects with the sampling capacitance: C
substantially a switched capacitance, with a frequency equal to the ADC conversion rate, it can be seen as a resistive path to
ground. For instance, assuming a conversion rate of 1 MHz, with C
/ (fc × C
partitioning between this resistance (sampled voltage on C
must be designed to respect the
Equation 4
and R
A second aspect involving the capacitance network shall be considered. Assuming the three capacitances C
initially charged at the source voltage V
is installed when the sampling phase is started (A/D switch closed).
66
AD
S
) can be neglected with respect to external resistances.
), where fc represents the conversion rate at the considered channel). To minimize the error induced by the voltage
generates a constraint for external network design, in particular on resistive path. Internal switch resistances (R
R
R
C
R
R
R
C
C
V
S
F
F
L
SW1
AD
P
S
A
: Current limiter resistance
: Source impedance
: Filter resistance
: Filter capacitance
: Pin capacitance (two contributions, C
: Sampling capacitance
: Sampling switch impedance
: Channel selection switch impedance
Source
R
S
Equation
EXTERNAL CIRCUIT
MPC5604P Microcontroller Data Sheet, Rev. 7
V A
A
4:
(refer to the equivalent circuit reported in
R
Filter
Figure 15. Input equivalent circuit

F
C
R S
-------------------------------------------------------------------------- -
F
+
R F
Current Limiter
+
R L
R
R EQ
S
L
) and the sum of R
P1
+
R SW
and C
S
equal to 3 pF, a resistance of 330 k is obtained (R
C
+
P2
P1
R AD
)

V
INTERNAL CIRCUIT SCHEME
S
DD
1
-- - LSB
2
+ R
Figure
F
Selection
Channel
+ R
R
SW1
C
L
P2
15): A charge sharing phenomenon
+ R
SW
Sampling
R
+ R
AD
Freescale Semiconductor
C
AD
S
, the external circuit
F
, C
S
P1
being
and C
Eqn. 4
EQ
P2
= 1
are
SW