参数资料
型号: ST72T331N4T1
厂商: STMICROELECTRONICS
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP64
封装: PLASTIC, TQFP-64
文件页数: 105/107页
文件大小: 691K
代理商: ST72T331N4T1
97/107
ST72E331 ST72T331
PERIPHERAL CHARACTERISTICS (Cont’d)
(TA = -40°C to +125°C and VDD =5V±10% unless otherwise specified )
*Note:
ADC Accuracy vs. Negative Injection Current:
For Iinj-=0.8mA, the typical leakage induced inside the die is 1.6A and the effect on the ADC accuracy is
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 VDD supply, and worst case temperature.
A/D Converter Specifications
Symbol
Parameter
Conditio ns
Min
Typ
Max
Unit
TSAMPLE
Sample Duration
31.5
1/fCPU
Res
ADC Resolution
f
CPU=8MHz
VDD=VDDA=5V
8
bit
DLE
Differential Linearity Error*
±0.6
±1
ILE
Integral Linearity Error*
±2
VAIN
Analog Input Voltage
VSSA
VDDA
V
IADC
Supply current rise
during A/D conversion
fCPU=8MHz
VDD=VDDA=5V
1mA
tSTAB
Stabilization time after ADC enable
30
s
tCONV
Conversion Time
8
64
s
1/fCPU
RAIN
Resistance of analog sources
(VAIN)
fCPU=8MHz, T=25°C,
VDD=VDDA=5V
15
K
CHOLD
Hold Capacitance
22
pF
RSS
Resistance of sampling switch and
internal trace
2K
Px.x/AINx
RAIN
VAIN
Cpin
5pF
VDD
VT = 0.6V
leakage max.
VT = 0.6V
Cpin
VT
leakage
Chold
SS
Sampling
Switch
SS
RSS
at the pin due
to various junctions
Chold
22 pF
capacitance
= input capacitance
= threshold voltage
= sampling switch
= sample/hold
±1A
VSS
= leakage current
2K
97
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