DSP56F802 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'DSP56F802' PDF : 40 Pages View PDF
3.9 Analog-to-Digital Converter (ADC) Characteristics
Table 3-13 ADC Characteristics
Characteristic
Symbol
Min
Typ
Max
Unit
ADC input voltages
VADCIN
01
—
VREF2
V
Resolution
RES
12
—
12
Bits
Integral Non-Linearity3
INL
—
+/- 4
+/- 5
LSB4
Differential Non-Linearity
DNL
—
+/- 0.9
+/- 1
LSB3
Monotonicity
GUARANTEED
ADC internal clock5
fADIC
0.5
—
5
MHz
Conversion range
RAD
VSSA
—
VDDA
V
Power-up time
tADPU
—
2.5
—
msec
Conversion time
tADC
—
6
—
tAIC cycles6
Sample time
tADS
—
1
—
tAIC cycles6
Input capacitance
CADI
—
5
—
pF6
Gain Error (transfer gain)5
EGAIN
1.00
1.10
1.15
—
Offset Voltage5
VOFFSET
+10
+230
+325
mV
Total Harmonic Distortion5
THD
55
60
—
dB
Signal-to-Noise plus Distortion5
SINAD
54
56
—
—
Effective Number of Bits5
ENOB
8.5
9.5
—
bit
Spurious Free Dynamic Range5
SFDR
60
65
—
dB
Spurious Free Dynamic Range
SFDR
65
70
—
dB
ADC Quiescent Current (both ADCs)
IADC
—
50
—
mA
VREF Quiescent Current (both ADCs)
IVREF
—
12
16.5
mA
1. For optimum ADC performance, keep the minimum VADCIN value > 250mV. Inputs less than 250mV volts may convert
to a digital output code of 0 or cause erroneous conversions.
2. VREF must be equal to or less than VDDA - 0.3V and must be greater than 2.7V.
3. Measured in 10-90% range.
4. LSB = Least Significant Bit.
5. Guaranteed by characterization.
6. tAIC = 1/fADIC
56F802 Technical Data, Rev. 9
28
Freescale Semiconductor
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