str755fvx STMicroelectronics, str755fvx Datasheet - Page 65

• Manufacturer Part Number: str755fvx
• Description: Arm7tdmi-s, 32-bit Mcu With Flash, Smi, 3 Std 16-bit Timers Pwm Timer, Fast 10-bit Adc, I2c, Uart, Ssp, Usb And Can
• Manufacturer: STMicroelectronics

STR750F
ADC Accuracy vs. Negative Injection Current
Injecting negative current on specific pins listed in
input pin being converted) should be avoided as this significantly reduces the accuracy of
the conversion being performed. It is recommended to add a Schottky diode (pin to ground)
to pins which may potentially inject negative current.
Table 41.
Figure 30. Typical application with ADC
Analog Power Supply and Reference Pins
The V
Separation of the digital and analog power pins allow board designers to improve A/D
performance. Conversion accuracy can be impacted by voltage drops and noise in the event
of heavily loaded or badly decoupled power supply lines (see
Guidelines on page
a
AIN1/P0.03
AIN2/P0.12
AIN3/P0.17
AIN4/P0.19
AIN5/P0.22
AIN6/P0.23
AIN7/P0.27
AIN8/P0.29
AIN9/P1.04
AIN10/P1.06
AIN11/P1.08
AIN12/P1.11
AIN13/P1.12
AIN14/P1.13
AIN15/P1.14
Analog input
DDA_ADC
V
AIN
List of adjacent pins
and V
R
AIN
66).
SSA_ADC
None
None
P0.11
P0.18 and P0.16
P0.24
None
P2.04
P1.11 and P0.26
P0.30 and P0.28
None
P1.05
P1.04 and P1.13
P2.17 and P0.27
None
P1.14 and P1.01
None
C
AIN
AINx
pins are the analog power supply of the A/D converter cell.
V
DD
V
0.6V
V
0.6V
Related adjacent pins
T
T
Table 41
2kΩ(max)
I
±1µA
L
(generally adjacent to the analog
: General PCB Design
10-Bit A/D
Conversion
Electrical parameters
STR75XX
C
3.2pF
ADC
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