参数资料
型号: MC68HC05P9AMDW
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 26/158页
文件大小: 3885K
代理商: MC68HC05P9AMDW
ADC
Timing and Electrical Characteristics
ADC
Timing and Electrical Characteristics
1. V
DD = 5.0 Vdc ±10%, VSS = 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 = tCYC (1 ÷ fOP) 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
Bit
Absolute Accuracy (4.0 > V
RH > VDD)
(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
t
AD
(3)
s
Monotonicity
Inherent (Within Total Error)
Analog Input Voltage
VIN
V
SS
V
RH
V
Zero Input Reading (V
IN = 0 V)
00
01
Hex
Full-Scale Reading (V
IN = VRH)
FE
FF
Hex
Sample Acquisition Time(4)
External Clock
Internal RC Oscillator (ADRC = 1)
—12
12
t
AD
(5)
s
Input Capacitance
PC6/AN0, PC5/AN1, PC4/AN2, PC3/AN3
CIN
—12
pF
Input Leakage(6)
PC6/AN0, PC5/AN1, PC4/AN2, PC3/AN3
PC7/V
RH
——
±1
A
ADC On Current Stabilization Time
tADON
100
s
ADC RC Stabilization Time (ADRC = 1)
tADRC
100
s
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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