ST10F276-6QR3 STMicroelectronics, ST10F276-6QR3 Datasheet - Page 192

• Manufacturer Part Number: ST10F276-6QR3
• Description: MCU 16BIT 832K FLASH 144-PQFP
• Manufacturer: STMicroelectronics
• Series: ST10r

Specifications of ST10F276-6QR3

• Core Processor: ST10
• Core Size: 16-Bit
• Speed: 64MHz
• Connectivity: ASC, CAN, EBI/EMI, I²C, SSC, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 111
• Program Memory Size: 832KB (832K x 8)
• Program Memory Type: FLASH
• Ram Size: 68K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 24x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 144-MQFP, 144-PQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

Electrical characteristics
23.7.6
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Example of external network sizing
The following hypothesis is formulated in order to proceed with designing the external net-
work on A/D converter input pins:
1.
2.
3.
4.
5.
Now, the three elements of the external circuit R
discussed in the previous paragraphs have been used to size the component; the others
must now be verified. The relation which allows to minimize the accuracy error introduced by
the switched capacitance equivalent resistance is in this case:
–
–
–
–
–
–
–
–
–
–
–
Supposing to design the filter with the pole exactly at the maximum frequency of the
signal, the time constant of the filter is:
Using the relation between C
it is possible to define C
As a consequence of Step 1 and 2, RC can be chosen:
Considering the current injection limitation and supposing that the source can go up to
12V, the total series resistance can be defined as:
from which is now simple to define the value of R
Analog signal source bandwidth (f
Conversion rate (f
Sampling time (T
Pin input capacitance (C
Pin input routing capacitance (C
Sampling capacitance (C
Maximum input current injection (I
Maximum analog source voltage (V
Analog source impedance (R
Channel switch resistance (R
Sampling switch resistance (R
S
C
):
F
):
:
F
P1
S
and C
):
R
R
):
R
F
L
S
R
=
=
R EQ
C
S
SW
+
C
F
V
------------ - R
I
AD
------------------- -
2
):
C
INJ
R
=
AM
π
F
S
F
=
P2
):
1
f
4000
=
):
0
+
–
-------------- -
f
and taking some margin (4000 instead of 2048),
C
C
0
INJ
):
----------- -
2π
R
F
1
):
C
AM)
1
L
F
=
S
C
f
=
⋅
):
–
0
=
S
=
995Ω
R
V
------------ -
I
10MΩ
=
INJ
F
:
AM
S
, C
15.9µs
16nF
=
=
2.9kΩ
10 kHz
25 kHz
1µs
5pF
1pF
4pF
3mA
12V
100Ω
500Ω
200Ω
F
≅
4kΩ
1kΩ
and R
L
:
L
are defined. Some conditions
ST10F276E