LM3S1637 Datasheet, PDF (655/696 Pages) Texas Instruments – ARM and Thumb are registered trademarks and Cortex is a trademark

Stellaris^® LM3S1637 Microcontroller
21.2.8
Analog-to-Digital Converter
Table 21-18. 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
V_ADCIN
voltage
Maximum differential, full-scale analog input voltage
-
-
1.5
V
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
14
16
18
1
1000
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 MHz.
d. The offset error listed above is the conversion result with 0 V applied to the ADC input.
Figure 21-11. ADC Input Equivalency Diagram
VDD
Stellaris® Microcontroller
R_ADC
10-bit
converter
V_IN
I_L
C_ADC
Sample and hold
ADC converter
June 18, 2012
655
Texas Instruments-Production Data