Datasheet
3.8.1 Enhanced Queued Analog-to-Digital Converter (eQADC)
Table 17. eQADC conversion specifications (operating)
Symbol Parameter
Value
Unit
Min Max
f
ADCLK
ADC Clock (ADCLK) Frequency 2 33 MHz
CC Conversion Cycles 2 + 13 128 + 15
1
ADCLK cycles
T
SR
Stop Mode Recovery Time
2
10 — μs
— Resolution
3
1.25 — mV
INL INL: 16.5 MHz eQADC clock
4
–4 4 LSB
5
INL: 33 MHz eQADC clock
4
–6 6 LSB
DNL DNL: 16.5 MHz eQADC clock
4
–3 3 LSB
DNL: 33 MHz eQADC clock
4
–3 3 LSB
OFFNC Offset Error without Calibration 0 140 LSB
OFFWC Offset Error with Calibration –8 8 LSB
GAINNC Full Scale Gain Error without Calibration –150 0 LSB
GAINWC Full Scale Gain Error with Calibration –8 8 LSB
I
INJ
Disruptive Input Injection Current
6, 7, 8, 9
–3 3 mA
E
INJ
Incremental Error due to injection current
10, 11
— +4 Counts
TUE TUE value
12, 13
(with calibration) — ±8 Counts
GAINVGA1 Variable gain amplifier accuracy (gain = 1)
14
INL, 16.5 MHz ADC
INL, 33 MHz ADC
DNL, 16.5 MHz ADC
DNL, 33 MHz ADC
-
–4
–8
–3
15
–3
15
-
4
8
3
15
3
15
Counts
16
GAINVGA2 Variable gain amplifier accuracy (gain = 2)
14
INL, 16.5 MHz ADC
INL, 33 MHz ADC
DNL, 16.5 MHz ADC
DNL, 33 MHz ADC
-
–5
–8
–3
–3
-
5
8
3
3
Counts
GAINVGA4 Variable gain amplifier accuracy (gain = 4)
14
INL, 16.5 MHz ADC
INL, 33 MHz ADC
DNL, 16.5 MHz ADC
DNL, 33 MHz ADC
-
–7
–8
–4
–4
-
7
8
4
4
Counts
I
ADC
Current consumption per ADC (two ADCs per EQADC) — 10 mA
I
ADR
Reference voltage current consumption per EQADC — 200 μA
1. 128 sampling cycles (LST=128), differential conversion, pregain of x4
2. Stop mode recovery time is the time from the setting of either of the enable bits in the ADC Control Register to the time
that the ADC is ready to perform conversions. Delay from power up to full accuracy = 8 ms.
3. At V
RH_EQ
– V
RL_EQ
= 5.12 V, one count = 1.25 mV without using pregain. Based on 12-bit conversion result; does not
account for AC and DC errors
4. INL and DNL are tested from V
RL
+ 50 LSB to V
RH
– 50 LSB.
Electrical characteristics
MPC5777C Microcontroller Data Sheet Data Sheet, Rev. 13, 08/2018.
24 NXP Semiconductors