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| MC908KX2MDWE Datasheet, PDF (191/210 Pages) Freescale Semiconductor, Inc – High-performance M68HC08 architecture, Fully upward-compatible object code with M6805, M146805, and M68HC05 Families | |||
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Analog-to-Digital Converter (ADC) Characteristics
17.10 Analog-to-Digital Converter (ADC) Characteristics
Characteristic
Supply voltage
Input voltages
Resolution
Absolute accuracy(1), (2)
Symbol
VDD
VADIN
BAD
AAD
ADC clock rate
fADIC
Conversion range
RAD
Power-up time
tADPU
Conversion time
tADC
Sample time
tADS
Monotocity
MAD
Zero input reading
ZADI
Full-scale reading
FADI
Input capacitance
CADI
1. One count is 1/256 of VDD.
2. VREFH is shared with VDD. VREFL is shared with VSS.
Min
2.7
0
8
â2.5
500 k
VSS
16
16
5
00
â
â
Max
5.5
VDD
8
+2.5
1.048 M
VDD
â
17
â
â
FF
20
Unit
Notes
V
V
Bits
Counts
8 bits = 256 counts
Hz
tAIC = 1/fADIC,
Tested only at 1 MHz
V
tAIC cycles
tAIC cycles
tAIC cycles
Guaranteed
Hex
VIn = VSS
Hex
VIn = VDD
pF
Not tested
MC68HC908KX8 ⢠MC68HC908KX2 ⢠MC68HC08KX8 Data Sheet, Rev. 2.1
Freescale Semiconductor
191
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