LM3S308 Luminary Micro, Inc, LM3S308 Datasheet - Page 390

• Manufacturer Part Number: LM3S308
• Description: Lm3s308 Arm Microcontroller
• Manufacturer: Luminary Micro, Inc

Electrical Characteristics
19.2.3
19.2.4
390
Table 19-7. Clock Characteristics
a. The ADC must be clocked from the PLL or directly from a 14-MHz to 18-MHz clock source to operate properly.
Analog-to-Digital Converter
Table 19-8. ADC Characteristics
a. t
Analog Comparator
Table 19-9. Analog Comparator Characteristics
Table 19-10. Analog Comparator Voltage Reference Characteristics
f
f
t
f
f
f
Parameter
V
C
N
f
t
f
INL
DNL
OFF
GAIN
Parameter
Parameter
IOSC
MOSC
MOSC_per
ref_crystal_bypass
ref_ext_bypass
system_clock
ADC
ADCCONV
ADCCONV
ADCIN
ADCIN
Parameter
ADC
C
V
R
V
T
R
T
MRR
CM
MC
OS
RT
HR
LR
= 1/f
ADC clock
Parameter Name
Maximum single-ended, full-scale analog input voltage
Minimum single-ended, full-scale analog input voltage
Maximum differential, full-scale analog input voltage
Minimum differential, full-scale analog input voltage
Equivalent input capacitance
Resolution
ADC internal clock frequency
Conversion time
Conversion rate
Integral nonlinearity
Differential nonlinearity
Offset
Gain
Parameter Name
Input offset voltage
Input common mode voltage range
Common mode rejection ratio
Response time
Comparator mode change to Output Valid
Parameter Name
Resolution high range
Resolution low range
Parameter Name
Internal oscillator frequency
Main oscillator frequency
Main oscillator period
Crystal reference using the main oscillator (PLL in BYPASS mode)
a
External clock reference (PLL in BYPASS mode)
System clock
Min
-
-
Preliminary
V
V
Nom
DD
DD
/32
/24
Min
50
0
Max
-
-
-
-
-
Nom
±10
Unit
LSB
LSB
-
-
-
-
a
V
Min
438
DD
Max
±25
7
10
-
-
-
-
-
-
-
-
-
-
-
1
-
-1.5
Nom
500
10
1
8
-
-
-
-
-
-
-
-
-
Unit
mV
dB
µs
µs
V
Max
-1.5
563
3.0
1.5
16
±1
±1
±1
±1
0
9
-
-
Min
125
k samples/s
t
7
1
1
0
0
ADC
Unit
MHz
LSB
LSB
LSB
LSB
bits
cycles
pF
Nom
V
V
V
V
12
-
-
-
-
-
a
1000
Max
22
25
25
8
8
MHz
MHz
MHz
MHz
MHz
Unit
ns
June 04, 2008