ST72T331 STMICROELECTRONICS [STMicroelectronics], ST72T331 Datasheet - Page 97

• Manufacturer Part Number: ST72T331
• Description: 8-BIT MCU WITH 8 TO 16K OTP/EPROM, 256 EEPROM, 384 TO 512 BYTES RAM, ADC, WDG, SCI, SPI AND 2 TIMERS
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

PERIPHERAL CHARACTERISTICS (Cont’d)
(T
*Note: ADC Accuracy vs. Negative Injection Current :
For I
a loss of 1 LSB by 10K increase of the external analog source impedance.
These measurements results and recommendations take worst case injection conditions into account:
- negative injection
- injection to an Input with analog capability, adjacent to the enabled Analog Input
- at 5V V
Symbol
C
V
SS
C
T
Res
DLE
ILE
V
I
t
t
R
C
R
leakage
A
ADC
STAB
CONV
T
pin
hold
SAMPLE
AIN
AIN
HOLD
SS
V
= -40°C to +125°C and V
inj-
AIN
=0.8mA, the typical leakage induced inside the die is 1.6µA and the effect on the ADC accuracy is
DD
= input capacitance
= threshold voltage
= sampling switch
= sample/hold
= leakage current
at the pin due
to various junctions
R
capacitance
Sample Duration
ADC Resolution
Differential Linearity Error*
Integral Linearity Error*
Analog Input Voltage
Supply current rise
during A/D conversion
Stabilization time after ADC enable
Conversion Time
Resistance of analog sources
(V
Hold Capacitance
Resistance of sampling switch and
internal trace
supply, and worst case temperature.
AIN
AIN)
Parameter
DD
Px.x/AINx
= 5V±10% unless otherwise specified )
C
5pF
pin
A/D Converter Specifications
f
V
f
V
f
V
CPU
CPU
CPU
DD
DD
DD
=8MHz
=8MHz
=8MHz, T=25°C,
=V
=V
=V
Conditions
DDA
DDA
DDA
V
V
T
T
=5V
=5V
=5V
V
= 0.6V
= 0.6V
DD
±1µA
leakage max.
V
Min
SSA
SS
Sampling
Switch
2K
ST72E331 ST72T331
Typ
31.5
±0.6
30
64
8
1
8
R
SS
V
Max
±1
±2
15
22
DDA
2
C
V
22 pF
SS
hold
1/f
bit
V
mA
µs
µs
1/f
K
pF
K
97/107
Unit
CPU
CPU
97