ST10F272Z2T3 STMicroelectronics, ST10F272Z2T3 Datasheet - Page 154
ST10F272Z2T3
Manufacturer Part Number
ST10F272Z2T3
Description
MCU 16BIT 256KBIT FLASH 144-TQFP
Manufacturer
STMicroelectronics
Series
ST10r
Datasheet
1.ST10F272Z2Q3.pdf
(189 pages)
Specifications of ST10F272Z2T3
Core Processor
ST10
Core Size
16-Bit
Speed
40MHz
Connectivity
ASC, CAN, EBI/EMI, I²C, SSC, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
111
Program Memory Size
256KB (256K x 8)
Program Memory Type
FLASH
Ram Size
20K 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-TQFP, 144-VQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Available stocks
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Part Number
Manufacturer
Quantity
Price
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Part Number:
ST10F272Z2T3
Manufacturer:
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Quantity:
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Electrical characteristics
154/189
1.
2.
3.
4.
5.
For complete set of parameters characterizing the ST10F272Z2 A/D Converter equivalent
circuit, refer to
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
Now the three element of the external circuit R
conditions discussed in the previous paragraphs have been used to size the
component, the other must now be verified. The relation which allow to minimize the
accuracy error introduced by the switched capacitance equivalent resistance is in this
case:
So the error due to the voltage partitioning between the real resistive path and C
less then half a count (considering the worst case when V
The other conditions to be verified is the time constants of the transients are really and
significantly shorter than the sampling period duration T
Section 25.7: A/D converter characteristics on page
V A
10 τ 2
⋅
⋅
R S R F R L R SW R AD
-------------------------------------------------------------------------- -
τ 1
=
=
F
+
:
10 R ⋅ L
(
R SW
R L
R S
R F
F
+
=
R C C F
and C
=
⋅
C F
+
R EQ
(
R EQ
C S
V AM
------------ - R F R S
+
I INJ
-------------------- -
2πf 0 C F
R F
+
=
R AD
+
=
1
4000 C S
=
+
S
C P1
–
-------------- -
f C C S
and taking some margin (4000 instead of 2048),
R L
----------- -
2πf 0
)
1
⋅
1
=
+
C S
⋅
=
+
–
995Ω
=
=
C P2
V AM
------------ -
I INJ
=
=
15.9µs
10MΩ
16nF
2.8ns
F
=
=
, C
)
=
≅
=
2.35mV
2.9kΩ
L
:
1kΩ
F
4kΩ
290ns
and R
<< T
S
<
:
S
A
L
1
-- - LSB
2
< T
= 1µs
= 5 V):
are defined. Some
S
146.
= 1µs
ST10F272Z2
S
is
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