Freescale-semiconductor 56F8122 Manual de usuario Pagina 122

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56F8322 Techncial Data, Rev. 10.0
122 Freescale Semiconductor
Preliminary
10.15 Analog-to-Digital Converter (ADC) Parameters
Table 10-24 ADC Parameters
Characteristic Symbol Min Typ Max Unit
Input voltages
V
ADIN
V
REFL
—V
REFH
V
Resolution
R
ES
12 12 Bits
Integral Non-Linearity
1
INL +/- 2.4 +/- 3.2
LSB
2
Differential Non-Linearity
DNL +/- 0.7 < +1
LSB
2
Monotonicity
GUARANTEED
ADC internal clock
f
ADIC
0.5 5 MHz
Conversion range
R
AD
V
REFL
—V
REFH
V
ADC channel power-up time
t
ADPU
5616
t
AIC
cycles
3
ADC reference circuit power-up time
4
t
VREF
——25ms
Conversion time
t
ADC
—6
t
AIC
cycles
3
Sample time
t
ADS
—1
t
AIC
cycles
3
Input capacitance
C
ADI
—5pF
Input injection current
5
, per pin
I
ADI
—— 3mA
Input injection current, total
I
ADIT
——20mA
V
REFH
current
I
VREFH
—1.2 3mA
ADC A current
I
ADCA
—25mA
ADC B current
I
ADCB
—25mA
Quiescent current I
ADCQ
—010
µA
Uncalibrated Gain Error (ideal)
E
GAIN
+/- .004 +/- .01
Uncalibrated Offset Voltage
V
OFFSET
+/- 26 +/- 32 mV
Calibrated Absolute Error
6
AE
CAL
See Figure 10-20 LSBs
Calibration Factor 1
7
CF1 0.008597
Calibration Factor 2
7
CF2 -2.8
Crosstalk between channels
—— -60 dB
Common Mode Voltage
V
common
—(V
REFH
- V
REFLO
) / 2 V
Signal-to-noise ratio
SNR 64.6 db
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