STR710RZ STMicroelectronics, STR710RZ Datasheet - Page 67

• Manufacturer Part Number: STR710RZ
• 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

Specifications of STR710RZ

• 5 Power Saving Modes: SLOW, WAIT, LPWAIT, STOP and STANDBY modes
• Conversion Range: 0 to 2.5 V

STR71xF
Table 43.
Figure 38. ADC accuracy characteristics
ADC_DATA(2.5V) Converted code when AIN=2.5V
ADC_DATA(0V)
ADC_DATA(2.5V)
Symbol
ADC_DATA(0V)
VCM
TUE
|E
|E
D
L
|
|
ADC accuracy with f
1. Data based on characterisation, not tested in production.
4095
4094
4093
5
4
3
2
1
ADC Accuracy vs. Negative Injection Current: Injecting negative current on any of the standard (non-
robust) analog input pins should be avoided as this significantly reduces the accuracy of the conversion
being performed on another analog input. It is recommended to add a Schottky diode (pin to ground) to
standard analog pins which may potentially inject negative current. The effect of negative injection current
on robust pins is specified in
Any positive injection current within the limits specified for I
affect the ADC accuracy.
0
AV
SS
Converted code when AIN=0V
Center voltage of Sigma-Delta
Modulator
Total unadjusted error
Differential linearity error
Integral linearity error
1LSB
1
IDEAL
(2)
2
3
=
1)
AVDD AVSS
----------------------------------------------- -
Parameter
(3)
4095
(1)
–
1633
VCM
PCLK2
1)
Section
1)
= 20 MHz, f
(1) Example of an actual transfer curve
(2) The ideal transfer curve
(3) End point correlation line
E
ideal one.
E
the end point correlation line.
4.3.5.
V
D
L
1)
AIN
=Integral Linearity Error: maximum deviation between any actual transition and
=Differential Linearity Error: maximum deviation between actual steps and the
1)
(LSB
1 LSB
In this type of ADC, calibration is necessary to correct
gain error and offset errors. Once calibrated, the TUE is
limited to the ILE.
ADC
IDEAL
IDEAL
3100 3101 3102 3103
Conditions
)
=10 MHz, AV
E
L
E
INJ(PIN)
D
and ΣI
DD
=3.3 V
2370
1480
INJ(PIN)
1.23
Min
Out of range
in
Electrical parameters
Section 4.3.5
1.25
1.96
2.36
Typ
4093 4094 4095
2565
1680
Max
1.30
2.19
3.95
AV
does not
DD
code
Dec-
Unit
LSB
67/78
imal
V