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| MC68HC08AS32A Datasheet, PDF (281/296 Pages) Motorola, Inc – Microcontrollers | |||
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Freescale Semiconductor, Inc.
Electrical Specifications
ADC Characteristics
18.7 ADC Characteristics
Characteristic
Min
Max
Unit
Comments
Resolution
8
8
Bits
Absolute accuracy
(VREFL = 0 V, VDDA = VREFH = 5 V ± 10%)
â1
+1
LSB
Includes quantization
Conversion range(1) (see note 1)
VREFL
VREFH
V
VREFL = VSSA
Power-up time
16
17
µs
Conversion time period
Input leakage(2) (see note 3)
Ports B and D
â1
1
µA
Conversion Time
16
17
ADC clock
cycles
Includes sampling time
Monotonicity
Inherent within total error
Zero input reading
00
01
Hex
VIN = VREFL
Full-scale reading
FE
FF
Hex
VIN = VREFH
Sample time(3) (see Note 2)
ADC
5
â
Clock
Cycles
Input capacitance
â
8
pF
Not tested
ADC internal clock
500 k
1.048 M
Hz
Tested only at 1 MHz
Analog input voltage
â0.3
VDD + 0.3
V
1. VDD = 5.0 Vdc ± 10%, VSS = 0 Vdc, VDDA/VDDAREF = 5.0 Vdc ± 10%, VSSA = 0 Vdc, VREFH = 5.0 Vdc ± 10%
2. The external system error caused by input leakage current is approximately equal to the product of R source and input
current.
3. Source impedances greater than 10 k⦠adversely affect internal RC charging time during input sampling.
MC68HC08AS32A â Rev. 1
MOTOROLA
Electrical Specifications
For More Information On This Product,
Go to: www.freescale.com
Data Sheet
281
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