Datasheet

6.4.1.2 12-bit ADC electrical characteristics
NOTE
ADC performance specifications are documented using a single
ADC. For parallel/simultaneous operation of both ADCs, either
for sampling the same channel by both ADCs or for sampling
different channels by each ADC, some amount of decrease in
performance can be expected. Care must be taken to stagger the
two ADC conversions, in particular the sample phase, to
minimize the impact of simultaneous conversions.
Table 25. 12-bit ADC characteristics (2.7 V to 3 V) (V
REFH
= V
DDA
, V
REFL
= V
SS
)
Symbol Description Conditions
1
Min. Typ.
2
Max. Unit Notes
V
DDA
Supply voltage 2.7 — 3 V
I
DDA_ADC
Supply current per ADC — 0.6 1.5 mA 3
SMPLTS Sample Time 275 — Refer to
the
Reference
Manual
ns
TUE
4
Total unadjusted error — ±4 ±8 LSB
5
6, 7, 8, 9
DNL Differential non-linearity — ±1.0 — LSB
5
6, 7, 8, 9
INL Integral non-linearity — ±2.0 — LSB
5
6, 7, 8, 9
1. All accuracy numbers assume the ADC is calibrated with V
REFH
=V
DDA
=V
DD
, with the calibration frequency set to half the
ADC clock frequency.
2. Typical values assume V
DDA
= 3 V, Temp = 25 °C, f
ADCK
= 40 MHz, R
AS
=20 Ω, and C
AS
=10 nF, 100 LQFP package unless
otherwise stated.
3. The ADC supply current depends on the ADC conversion rate.
4. Represents total static error, which includes offset and full scale error.
5. 1 LSB = (V
REFH
- V
REFL
)/2
N
6. The specifications are with averaging and in standalone mode only. Performance may degrade depending upon device
use case scenario. When using ADC averaging, refer to the Reference Manual to determine the most appropriate settings
for AVGS.
7. For ADC signals adjacent to V
DD
/V
SS
or XTAL/EXTAL or high frequency switching pins, some degradation in the ADC
performance may be observed.
8. All values guarantee the performance of the ADC for multiple ADC input channel pins. When using ADC to monitor the
internal analog parameters, assume minor degradation.
9. All the parameters in the table are given assuming system clock as the clocking source for ADC.
Table 26. 12-bit ADC characteristics (3 V to 5.5 V)(V
REFH
= V
DDA
, V
REFL
= V
SS
)
Symbol Description Conditions
1
Min. Typ.
2
Max. Unit Notes
V
DDA
Supply voltage 3 — 5.5 V
I
DDA_ADC
Supply current per ADC — 1 2.1 mA 3
SMPLTS Sample Time 275 — Refer to
the
Reference
Manual
ns
Table continues on the next page...
ADC electrical specifications
S32K1xx Data Sheet, Rev. 4, 06/2017
36
Preliminary
NXP Semiconductors