参数资料
型号: MC68HC705E6MFB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封装: PLASTIC, QFP-44
文件页数: 18/140页
文件大小: 1584K
代理商: MC68HC705E6MFB
Electrical Specications
MC68HC05E6 — Rev. 1.0
Electrical Specifications
A/D converter electrical characteristics
Table 25 A/D converter electrical characteristics for 5V operation
(VDD = 5.0 Vdc ± 10%, VSS = 0 Vdc, TA = TL to TH)
Characteristic
Parameter
Min
Max
Unit
Resolution
Number of bits resolved by A/D converter
8
Bits
Non-linearity
Maximum deviation from best straight line through
the A/D transfer characteristics
(VRH = VDD and VRL = 0V)
±0.5
LSB
Quantization error
Uncertainty due to converter resolution
±0.5
LSB
Absolute accuracy
Difference between the actual input voltage and the
full-scale equivalent of the binary output code for all
errors
±1.5
LSB
Conversion range
Analog input voltage range
VRL
VRH
V
VRH
Maximum analog reference voltage
VRL
VDD + 0.1
V
Conversion time
Total time to perform a single analog to digital
conversion
Bus clock
Internal RC oscillator
32
tCYC
s
Monotonicity
Conversion result never decreases with an increase
in input voltage and has no missing codes
Guaranteed
Zero input reading
Conversion result when VIN = VRL
$00
Hex
Full scale reading
Conversion result when VIN = VRH
$FF
Hex
Sample acquisition
time(1)
1. Source impedances greater than 10 k
will adversely affect internal RC charging time during input sampling.
Analog input acquisition sample time
Bus clock
Internal RC oscillator
12
tcyc
s
Sample/hold
capacitance
Input capacitance during sample ADIN
12
pF
Input leakage(2)
2. The external system error caused by input leakage current is approximately equal to the product of RSOURCE and input
current. Input current to A/D channel will be dependent on external source impedance (see Figure 17).
Input leakage on A/D pins ADIN and VREFH
—1
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