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| MC68HC908LD64 Datasheet, PDF (348/362 Pages) Freescale Semiconductor, Inc – Microcontrollers | |||
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Electrical Specifications
24.10 ADC Electrical Characteristics
Table 24-8. ADC Electrical Characteristics
Characteristic(1)
Symbol
Min
Max
Unit
Comments
Supply voltage
VDDAD
3.0
3.6
V
VDD ± 10%
Input voltages
VADIN
0
VDD
V
Resolution
BAD
8
8
Bits
Absolute accuracy
AAD
±1
±2
LSB Includes quantization
ADC internal clock
fADIC
0.5
1.048
MHz
tAIC = 1/fADIC,
tested only at 1 MHz
Conversion range
RAD
VSS
VDD
V
Power-up time
tADPU
16
tAIC
cycles
Conversion time
tADC
16
17
tAIC
cycles
Sample time(2)
tADS
5
â
tAIC
cycles
Zero input reading(3)
Full-scale reading(3)
ZADI
00
FADI
FD
02
HEX
FF
HEX
Input capacitance
Input leakage(4)
Port C
CADI
â
â
â
8
pF
Not tested
±1
µA
Notes:
1. VDD = 3.0 to 3.6 Vdc, VSS = 0 Vdc, TA = TL to TH, unless otherwise noted.
2. Source impedances greater than 10 k⦠adversely affect internal RC charging time during input sampling.
3. Zero-input/full-scale reading requires sufficient decoupling measures for accurate conversions.
4. The external system error caused by input leakage current is approximately equal to the product of R source and input
current.
Data Sheet
348
Electrical Specifications
MC68HC908LD64 â Rev. 3.0
Freescale Semiconductor
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