LM3S818-IQN50-C2 Datasheet, PDF (532/569 Pages) Texas Instruments – LM3S818 Microcontroller

Electrical Characteristics
NRND: Not recommended for new designs.
19.2.7
Table 19-13. GPIO Characteristics
Parameter Parameter Name Condition
Min
Nom
Max
Unit
2-mA drive
17
26
ns
t_GPIOR
GPIO Rise Time
(from 20% to 80%
of V_DD)
4-mA drive
8-mA drive
9
13
ns
-
6
9
ns
8-mA drive with slew rate control
10
12
ns
2-mA drive
17
25
ns
t_GPIOF
GPIO Fall Time
(from 80% to 20%
of V_DD)
4-mA drive
8-mA drive
8
12
ns
-
6
10
ns
8-mA drive with slew rate control
11
13
ns
Analog-to-Digital Converter
Table 19-14. ADC Characteristics^a
Parameter Parameter Name
Min
Nom
Max
Unit
Maximum single-ended, full-scale analog input
-
-
3.0
V
voltage
Minimum single-ended, full-scale analog input
0.0
-
-
V
voltage
V_ADCIN
Maximum differential, full-scale analog input
-
-
1.5
V
voltage
Minimum differential, full-scale analog input
0.0
-
-
V
voltage
N
Resolution
10
bits
f_ADC
t_ADCCONV
f _ADCCONV
ADC internal clock frequency^b
Conversion time^c
Conversion rate^c
14
16.667
18
1
1041.667
MHz
µs
k samples/s
t_LT
Latency from trigger to start of conversion
-
2
-
system clocks
I_L
ADC input leakage
-
-
±3.0
µA
R_ADC
ADC equivalent resistance
-
-
10
kΩ
C_ADC
ADC equivalent capacitance
0.9
1.0
1.1
pF
E_L
Integral nonlinearity error
-
-
±3
LSB
E_D
Differential nonlinearity error
E_O
Offset error
-
-
±2
LSB
-
-
+6^d
LSB
E_G
Full-scale gain error
-
-
±3
LSB
E_TS
Temperature sensor accuracy
-
-
±5
°C
a. The ADC reference voltage is 3.0 V. This reference voltage is internally generated from the 3.3 VDDA supply by a band
gap circuit.
b. The ADC must be clocked from the PLL or directly from an external clock source to operate properly.
c. The conversion time and rate scale from the specified number if the ADC internal clock frequency is any value other than
16.667 MHz.
d. The offset error listed above is the conversion result with 0 V applied to the ADC input.
532
June 18, 2012
Texas Instruments-Production Data