Peripheral operating requirements and behaviors
6.6.1 ADC electrical specifications
The 16-bit accuracy specifications listed in Table 23 and Table 24 are achievable on the
differential pins ADCx_DP0, ADCx_DM0.
All other ADC channels meet the 13-bit differential/12-bit single-ended accuracy
specifications.
6.6.1.1 16-bit ADC operating conditions
Table 23. 16-bit ADC operating conditions
Typ.1
Symbol Description
Conditions
Absolute
Min.
1.71
-100
Max.
3.6
Unit
V
Notes
VDDA
Supply voltage
Supply voltage
—
ΔVDDA
Delta to VDD (VDD
-
0
+100
mV
2
2
VDDA
)
ΔVSSA
Ground voltage
Delta to VSS (VSS
-
-100
0
+100
mV
VSSA
)
VREFH
ADC reference
voltage high
1.13
VSSA
VREFL
VDDA
VSSA
—
VDDA
V
V
VREFL
Reference
voltage low
VSSA
VADIN
CADIN
Input voltage
VREFH
V
Input
capacitance
• 16 bit modes
—
—
8
4
10
5
pF
• 8/10/12 bit
modes
RADIN
RAS
Input resistance
—
—
2
5
5
kΩ
kΩ
Analog source
resistance
13/12 bit modes
fADCK < 4MHz
3
—
fADCK
fADCK
Crate
ADC conversion ≤ 13 bit modes
clock frequency
4
4
5
1.0
2.0
—
—
—
18.0
12.0
MHz
MHz
Ksps
ADC conversion 16 bit modes
clock frequency
ADC conversion ≤ 13 bit modes
rate
No ADC hardware
20.000
818.330
averaging
Continuous
conversions enabled,
subsequent conversion
time
Table continues on the next page...
K20 Sub-Family Data Sheet, Rev. 4 5/2012.
36
Freescale Semiconductor, Inc.