System modules
7. For guidelines and examples of conversion rate calculation, download the ADC calculator tool: http://cache.freescale.com/
files/soft_dev_tools/software/app_software/converters/ADC_CALCULATOR_CNV.zip?fpsp=1
SIMPLIFIED
INPUT PIN EQUIVALENT
ZADIN
CIRCUIT
SIMPLIFIED
CHANNEL SELECT
CIRCUIT
Pad
leakage
due to
input
protection
ZAS
ADC SAR
ENGINE
RAS
RADIN
VADIN
CAS
VAS
RADIN
RADIN
RADIN
INPUT PIN
INPUT PIN
INPUT PIN
CADIN
Figure 10. ADC input impedance equivalency diagram
8.5.2.2 16-bit ADC electrical characteristics
Table 27. 16-bit ADC characteristics (VREFH = VDDA, VREFL = VSSA
)
Symbol Description
Conditions1
Min.
Typ.2
Max.
1.7
3.9
7.3
6.1
9.5
Unit
Notes
IDDA_ADC Supply current
—
mA
3
ADC
asynchronous
• ADLPC=1, ADHSC=0
• ADLPC=1, ADHSC=1
• ADLPC=0, ADHSC=0
• ADLPC=0, ADHSC=1
1.2
3.0
2.4
4.4
2.4
4.0
5.2
6.2
tADACK = 1/
fADACK
MHz
MHz
MHz
MHz
clock source
fADACK
Sample Time
See Reference Manual chapter for sample times
TUE
DNL
Total unadjusted
error
• 12 bit modes
• <12 bit modes
—
—
4
6.8
2.1
LSB4
LSB4
5
5
1.4
Differential non-
linearity
• 16 bit modes
• 12 bit modes
• <12 bit modes
• 16 bit modes
• 12 bit modes
• <12 bit modes
—
—
—
—
—
—
-1 to +4
0.7
TBD
0.2
-0.3 to 0.5
INL
Integral non-
linearity
7.0
LSB4
5
1.0
-2.7 to +1.9
-0.7 to +0.5
0.5
Table continues on the next page...
MC56F8455x Advance Information Data Sheet, Rev. 2, 06/2012.
Freescale Semiconductor, Inc.
45
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General Business Information
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