參數(shù)資料
型號: MC68HC05P9AP
廠商: 飛思卡爾半導體(中國)有限公司
英文描述: HCMOS Microcontroller Unit
中文描述: HCMOS微控制器
文件頁數(shù): 121/158頁
文件大?。?/td> 1106K
代理商: MC68HC05P9AP
ADC
Timing and Electrical Characteristics
MOTOROLA
ADC
121
Timing and Electrical Characteristics
1. V
DD
= 5.0 Vdc
±
10%, V
SS
= 0 Vdc
2. ADC accuracy may decrease proportionately as V
RH
is reduced below 4.0 V.
3. t
AD
= cycle time of the A/D converter
4. Source impedances more than 10 k
adversely affect internal RC charging time during input
sampling.
5. t
AD
= t
CYC
(1
÷
f
OP
) if MCU clock is clock source
6. External system error caused by input leakage approximately equals R source times input
current.
Table 25. ADC Characteristics (V
DD
= 5.0 Vdc)
(1)
Characteristic
Symbol
Min
Max
Unit
Resolution
8
8
Bit
Absolute Accuracy (4.0 > V
RH
> V
DD
)
(2)
±
1.5
LSB
Conversion Range (PC7/V
RH
)
V
SS
V
DD
V
Conversion Time (Includes Sampling Time)
External Clock
Internal RC Oscillator (ADRC = 1)
32
32
32
32
t
AD
(3)
μ
s
Monotonicity
Inherent (Within Total Error)
Analog Input Voltage
V
IN
V
SS
V
RH
V
Zero Input Reading (V
IN
= 0 V)
00
01
Hex
Full-Scale Reading (V
IN
= V
RH
)
Sample Acquisition Time
(4)
External Clock
Internal RC Oscillator (ADRC = 1)
FE
FF
Hex
12
12
12
t
AD
(5)
μ
s
Input Capacitance
PC6/AN0, PC5/AN1, PC4/AN2, PC3/AN3
C
IN
12
pF
Input Leakage
(6)
PC6/AN0, PC5/AN1, PC4/AN2, PC3/AN3
PC7/V
RH
±
1
±
1
μ
A
ADC On Current Stabilization Time
t
ADON
100
μ
s
ADC RC Stabilization Time (ADRC = 1)
t
ADRC
100
μ
s
9-mc68hc05p9a
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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