Freescale Semiconductor 56F8122 - Manual (Page 122)

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
5 6 16
t
AIC
cycles
3
ADC reference circuit power-up time 4 t
VREF
— — 25 ms
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
— — 3 mA
Input injection current, total I
ADIT
— — 20 mA
V
REFH
current I
VREFH
— 1.2 3 mA
ADC A current I
ADCA
— 25 — mA
ADC B current I
ADCB
— 25 — mA
Quiescent current I
ADCQ
— 0 10
µ
A
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