LM3S5951 Datasheet, PDF (1191/1261 Pages) Texas Instruments – Stellaris® LM3S5951 Microcontroller

Stellaris^® LM3S5951 Microcontroller
25.13
Table 25-21. GPIO Module Characteristics (continued)
Parameter Parameter Name
Min
Nom
Max
Unit
GPIO Rise Time, 2-mA drive^b
14
20
ns
T_GPIOR
GPIO Rise Time, 4-mA drive^b
GPIO Rise Time, 8-mA drive^b
7
10
ns
-
4
5
ns
GPIO Rise Time, 8-mA drive with slew rate control^b
6
8
ns
GPIO Fall Time, 2-mA drive^c
14
21
ns
T_GPIOF
GPIO Fall Time, 4-mA drive^c
GPIO Fall Time, 8-mA drive^c
7
11
ns
-
4
6
ns
GPIO Fall Time, 8-mA drive with slew rate control^c
6
8
ns
a. The leakage current is measured with GND or VDD applied to the corresponding pin(s). The leakage of digital port pins
is measured individually. The port pin is configured as an input and the pullup/pulldown resistor is disabled.
b. Time measured from 20% to 80% of V_DD.
c. Time measured from 80% to 20% of V_DD.
Analog-to-Digital Converter (ADC)
Table 25-22. ADC Characteristics^a
Parameter Parameter Name
Min
Nom
Max
Unit
Maximum single-ended, full-scale analog input
-
-
3.0
V
voltage, using internal reference
Maximum single-ended, full-scale analog input
-
-
V_REFA
V
voltage, using external reference
Minimum single-ended, full-scale analog input voltage 0.0
-
-
V
V_ADCIN
Maximum differential, full-scale analog input voltage,
-
-
1.5
V
using internal reference
Maximum differential, full-scale analog input voltage,
-
-
V_REFA/2
V
using external reference
Minimum differential, full-scale analog input voltage 0.0
-
-
V
N
Resolution
10
bits
F_ADC
T_ADCCONV
F_ADCCONV
ADC internal clock frequency^b
Conversion time^c
Conversion rate^c
15.9952
16
1
1000
16.0048
MHz
µs
k samples/s
T_ADCSAMP Sample time
187.5
-
-
ns
T_LT
Latency from trigger to start of conversion
-
2
-
system clocks
I_L
ADC input leakage
-
-
2.0
µA
R_ADC
ADC equivalent resistance
-
-
10
kΩ
C_ADC
ADC equivalent capacitance
0.9
1.0
1.1
pF
E_L
Integral nonlinearity (INL) error
-
-
±3
LSB
E_D
Differential nonlinearity (DNL) error
-
-
±3
LSB
E_O
Offset error
-
-
±20
LSB
E_G
Full-scale gain error
E_TS
Temperature sensor accuracy^d
-
-
±30
LSB
-
-
±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.
January 20, 2012
Texas Instruments-Production Data
1191