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| 型号： | MC68HC05SR3B |
| 厂商： | MOTOROLA INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | SDIP-42 |
| 文件页数： | 79/96页 |
| 文件大小： | 612K |
| 代理商： | MC68HC05SR3B |
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MOTOROLA
11-4
MC68HC05SR3
ELECTRICAL SPECIFICATIONS
11
11.4
ADC Electrical Characteristics
Table 11-3 ADC Electrical Characteristics for 5V and 3V Operation
CHARACTERISTICS
PARAMETER
MINIMUM
MAXIMUM
UNIT
Resolution
Number of bits resolved by the ADC
8
bits
Absolute accuracy
Difference between the actual input voltage and the
full-scale equivalent of the binary code output code for all
errors.(1)
—
±1.5 (V
DD = 5V)
±2 (V
DD = 3.3V)
LSB
Conversion range
Analog input voltage range
VRL
VRH
V
Power-up time
ADC power-up time delay, tADON
—
500
s
VRH
Maximum analog reference voltage
VRL
VDD+0.1
V
VRL
Minimum analog reference voltage
VSS–0.1
VRH
V
Conversion time
Total time to perform a single analog to digital conversion
(a) External clock (OSC1, OSC2)
(b) Internal RC oscillator
—
32
tCYC
Monotonicity
Conversion result never decreases with an increase in
input voltage and has no missing codes
Inherent (within total error)
Zero-input reading
Conversion result when VIN=VRL
00
—
hex
Full-scale reading
Conversion result when VIN=VRH
—FF
hex
Sample acquisition time
Analog input acquisition sampling(2)
(a) External clock (OSC1, OSC2)
(b) Internal RC oscillator
—
12
tCYC
s
Input capacitance
Input capacitance on AN0-AN3
—
8
pF
Input leakage
Input leakage on ADC pins(3)
AN0, AN1, AN2, AN3, VRL, VRH
—
±400
nA
Notes:
(1) Error includes quantization. ADC accuracy may decrease proportionately as VDD is reduced below 3.0V.
(2) Source impedances greater than 10K
adversely affect internal RC charging time during input sampling.
(3) The external system error caused by input leakage current is approximately equal to the product of R source and input current.
TPG
78
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