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MC68HC11E0CFNE2 Datasheet, PDF (166/242 Pages) Freescale Semiconductor, Inc – M68HC11 CPU, Power-saving stop and wait modes, Low-voltage devices available (3.0–5.5 Vdc)
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Electrical Characteristics
10.13 Analog-to-Digital Converter Characteristics
Characteristic(1)
Parameter(2)
Min
Resolution
Non-linearity
Zero error
Full scale error
Total unadjusted
error
Quantization
error
Absolute
accuracy
Conversion
range
VRH
VRL
∆VR
Number of bits resolved by A/D converter
—
Maximum deviation from the ideal A/D transfer
characteristics
—
Difference between the output of an ideal and an
actual for 0 input voltage
—
Difference between the output of an ideal and an
actual A/D for full-scale input voltage
—
Maximum sum of non-linearity, zero error, and
full-scale error
—
Uncertainty because of converter resolution
—
Difference between the actual input voltage and
the full-scale weighted equivalent of the binary
—
output code, all error sources included
Analog input voltage range
VRL
Maximum analog reference voltage(3)
Minimum analog reference voltage(2)
Minimum difference between VRH and VRL(2)
VRL
VSS –0.1
3
Absolute
8
—
—
—
—
—
—
—
—
—
—
2.0 MHz 3.0 MHz Uni
Max
Max
t
—
— Bits
±1/2
±1
LS
B
±1/2
±1
LS
B
±1/2
±1
LS
B
±1/2
±1/2
LS
B
±1/2
±1/2
LS
B
±1
±2
LS
B
VRH
VRH
V
VDD +0.1 VDD +0.1 V
VRH
VRH
V
—
—
V
Conversion
time
Total time to perform a single A/D conversion:
E clock
Internal RC oscillator
—
—
32
—
—
tCY
—
tCYC+32
tCYC+32
C
µs
Monotonicity
Conversion result never decreases with an
increase in input voltage; has no missing codes
—
Guaranteed
—
—
—
Zero input reading Conversion result when VIn = VRL
00
—
—
— Hex
Full scale
reading
Conversion result when VIn = VRH
—
—
FF
FF Hex
Sample
acquisition
time
Analog input acquisition sampling time:
E clock
Internal RC oscillator
—
12
—
—
—
12
Sample/hold
capacitance
Input capacitance during sample
PE[7:0]
—
20 typical
—
Input leakage
Input leakage on A/D pins
PE[7:0]
VRL, VRH
—
—
400
—
—
1.0
1. VDD = 5.0 Vdc ±10%, VSS = 0 Vdc, TA = TL to TH, 750 kHz ≤ E ≤ 3.0 MHz, unless otherwise noted
2. Source impedances greater than 10 kΩ affect accuracy adversely because of input leakage.
3. Performance verified down to 2.5 V ∆VR, but accuracy is tested and guaranteed at ∆VR = 5 V ±10%.
—
tCY
12
C
µs
—
pF
400 nA
1.0 µA
M68HC11E Family Data Sheet, Rev. 5.1
166
Freescale Semiconductor
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