ST72C254G2M6 STMicroelectronics, ST72C254G2M6 Datasheet - Page 129

• Manufacturer Part Number: ST72C254G2M6
• Description: IC MCU 8BIT 8K FLASH SOIC-28
• Manufacturer: STMicroelectronics
• Series: ST7r

Specifications of ST72C254G2M6

• Core Processor: ST7
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 3.2 V ~ 5.5 V
• Data Converters: A/D 6x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-SOIC (7.5mm Width)
• Controller Family/series: ST7
• No. Of I/o's: 22
• Ram Memory Size: 256Byte
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Rohs Compliant: Yes
• Processor Series: ST72C2x
• Core: ST7
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C, SPI
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 3 bit
• Operating Supply Voltage: 3.2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: ST7MDT1-DVP2/US
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: In Transition

8-BIT ADC CHARACTERISTICS (Cont’d)
ADC Accuracy
Figure 96. ADC Accuracy Characteristics
Notes:
1. ADC Accuracy vs. Negative Injection Current:
For I
for each 10K
under worst-case conditions for injection:
- negative injection
- injection to an Input with analog capability, adjacent to the enabled Analog Input
- at 5V V
2. Data based on characterization results with T
3. Data based on characterization results over the whole temperature range.
Symbol
255
254
253
|E
|E
|E
E
E
7
6
5
4
3
2
1
INJ-
T
O
G
D
L
0
V
|
|
|
SSA
=0.8mA, the typical leakage induced inside the die is 1.6µA and the effect on the ADC accuracy is a loss of 1 LSB
Digital Result ADCDR
DD
Total unadjusted error
Offset error
Gain Error
Differential linearity error
Integral linearity error
1
1LSB
supply, and worst case temperature.
E
O
increase of the external analog source impedance. This effect on the ADC accuracy has been observed
2
IDE AL
3
1)
1)
=
Parameter
4
V
---------------------------------------- -
DDA
5
256
1 LSB
–
1)
1)
V
E
SSA
6
1)
T
IDEAL
E
7
L
(2)
E
A
D
=25°C.
253 254 255 256
(3)
V
f
CPU
DD
Min
ST72104G, ST72215G, ST72216G, ST72254G
=5V,
=1MHz
(1)
E
2)
G
Max
V
2.0
1.5
1.5
1.5
1.5
DDA
V
f
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
E
between the actual and the ideal transfer curves.
E
transition and the first ideal one.
E
transition and the last actual one.
E
between actual steps and the ideal one.
E
between any actual transition and the end point
correlation line.
CPU
T
O
G
D
L
DD
Min
=Total Unadjusted Error: maximum deviation
=Integral Linearity Error: maximum deviation
=Differential Linearity Error: maximum deviation
=Offset Error: deviation between the first actual
=Gain Error: deviation between the last ideal
V
in
=5.0V,
=8MHz
(LSB
IDEAL
Max
3)
2.0
1.5
1.5
1.5
1.5
)
V
f
CPU
DD
Min
=3.3V,
=8MHz
Max
3)
2.0
1.5
1.5
1.5
1.5
129/140
Unit
LSB