Datasheet

Table 28. 16-bit ADC characteristics (V
REFH
= V
DDA
, V
REFL
= V
SSA
) (continued)
Symbol Description Conditions
1
Min. Typ.
2
Max. Unit Notes
f
ADACK
ADC
asynchronous
clock source
• ADLPC = 1, ADHSC = 0
• ADLPC = 1, ADHSC = 1
• ADLPC = 0, ADHSC = 0
• ADLPC = 0, ADHSC = 1
1.2
2.4
3.0
4.4
2.4
4.0
5.2
6.2
3.9
6.1
7.3
9.5
MHz
MHz
MHz
MHz
t
ADACK
= 1/
f
ADACK
Sample Time See Reference Manual chapter for sample times
TUE Total unadjusted
error
• 12-bit modes
• <12-bit modes
—
—
±4
±1.4
±6.8
±2.1
LSB
4
5
DNL Differential non-
linearity
• 12-bit modes
• <12-bit modes
—
—
±0.7
±0.2
-1.1 to +1.9
-0.3 to 0.5
LSB
4
5
INL Integral non-
linearity
• 12-bit modes
• <12-bit modes
—
—
±1.0
±0.5
-2.7 to +1.9
-0.7 to +0.5
LSB
4
5
E
FS
Full-scale error • 12-bit modes
• <12-bit modes
—
—
-4
-1.4
-5.4
-1.8
LSB
4
V
ADIN
=
V
DDA
5
E
Q
Quantization
error
• 16-bit modes
• ≤13-bit modes
—
—
-1 to 0
—
—
±0.5
LSB
4
ENOB Effective number
of bits
16-bit differential mode
• Avg = 32
• Avg = 4
16-bit single-ended mode
• Avg = 32
• Avg = 4
12.8
11.9
12.2
11.4
14.5
13.8
13.9
13.1
—
—
—
—
bits
bits
bits
bits
6
SINAD
Signal-to-noise
plus distortion
See ENOB
6.02 × ENOB + 1.76 dB
THD Total harmonic
distortion
16-bit differential mode
• Avg = 32
16-bit single-ended mode
• Avg = 32
—
—
–94
-85
—
—
dB
dB
7
SFDR Spurious free
dynamic range
16-bit differential mode
• Avg = 32
16-bit single-ended mode
• Avg = 32
82
78
95
90
—
—
dB
dB
7
Table continues on the next page...
Peripheral operating requirements and behaviors
K20 Sub-Family Data Sheet Data Sheet, Rev. 7, 02/2013.
42 Freescale Semiconductor, Inc.