Datasheet

Analog-to-Digital Converter (ADC) Parameters
56F8367 Technical Data, Rev. 9
Freescale Semiconductor 161
Preliminary
10.16 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
56 16
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
—5 —pF
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
—25 —mA
ADC B current I
ADCB
—25 —mA
Quiescent current I
ADCQ
—0 10
μA
Uncalibrated Gain Error (ideal = 1) E
GAIN
— .+/- .004 +/- .01 —
Uncalibrated Offset Voltage V
OFFSET
— +/- 27 +/- 40 mV
Calibrated Absolute Error
6
AE
CAL
—See Figure 10-23 — LSBs
Calibration Factor 1
7
CF1 — — 0.002289 —
Calibration Factor 2 CF2 — — –25.6 —
Crosstalk between channels — — -60 — dB
Common Mode Voltage V
common
—(V
REFH
- V
REFLO
) / 2 — V
Signal-to-noise ratio SNR — 64.6 — db