Datasheet
Table 16. ADC conversion characteristics (for 12-bit) (continued)
Symbol Parameter Conditions
1
Min Typ Max Unit
OFS Offset error — –6 — 6 LSB
GNE Gain error — –4 — 4 LSB
TUE
IS1WINJ
Total unadjusted error for IS1WINJ Without current injection –6 +/-4 6 LSB
STOP mode to Run mode recovery
time
< 1 µs
1. Recomended operating range, unless otherwise specified and analog input voltage from V
SS_HV_ADC1
to V
SS_HV_ADC_REF
.
2. The internally generated clock (known as AD_clk or ADCK) could be same as the peripheral clock or half of the peripheral
clock based on register configuration in the ADC.
3. During the sample time the input capacitance C
S
can be charged/discharged by the external source. The internal
resistance of the analog source must allow the capacitance to reach its final voltage level within t
sample
. After the end of the
sample time t
sample
, changes of the analog input voltage have no effect on the conversion result. Values for the sample
clock t
sample
depend on programming.
4. This parameter does not include the sample time t
sample
, but only the time for determining the digital result and the time to
load the result register with the conversion result.
5. Apart from tsample and tconv, few cycles are used up in ADC digital interface and hence the overall throughput from the
ADC is lower.
6. See Figure 5.
Table 17. ADC conversion characteristics (for 10-bit)
Symbol Parameter Conditions
1
Min Typ Max Unit
f
CK
ADC Clock frequency (depends on
ADC configuration) (The duty cycle
depends on AD_CK
2
frequency.)
— 15.2 80 80 MHz
f
s
Sampling frequency — — — 1.00 MHz
t
sample
Sample time
3
80 MHz@ 100 ohm source
impedance
275 800 — ns
t
conv
Conversion time
4
80 MHz 550 — — ns
t
total_conv
Total Conversion time tsample +
tconv (for standard channels)
80 MHz 1 — — µs
Total Conversion time tsample +
tconv (for extended channels)
1.5 — —
C
S
5
ADC input sampling capacitance — — 3 5 pF
C
P1
5
ADC input pin capacitance 1 — — — 5 pF
C
P2
5
ADC input pin capacitance 2 — — — 0.8 pF
R
SW1
5
Internal resistance of analog
source
V
REF
range = 4.5 to 5.5 V — — 0.3 kΩ
V
REF
range = 3.15 to 3.6 V — — 875 Ω
R
AD
5
Internal resistance of analog
source
— — — 825 Ω
INL Integral non-linearity — –2 — 2 LSB
DNL Differential non-linearity
6
— –1 — 1 LSB
OFS Offset error — –4 — 4 LSB
GNE Gain error — –4 — 4 LSB
Table continues on the next page...
Analog
MPC5748G Microcontroller Datasheet Data Sheet, Rev. 2, 05/2014.
24
Preliminary
Freescale Semiconductor, Inc.