Datasheet

LPC540xx All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet Rev. 1.8 — 22 June 2018 140 of 168
NXP Semiconductors
LPC540xx
32-bit ARM Cortex-M4 microcontroller
Table 53. ADC sampling times
[1]
-40  C  T
amb
<= 85  C; 1.71 V  V
DDA
 3.6 V; 1.71 V  V
DD
 3.6 V
Symbol Parameter Conditions Min Typ Max Unit
ADC inputs ADC_5 to ADC_0 (fast channels); ADC resolution = 12 bit
t
s
sampling time Z
o
< 0.05 kΩ
[3]
20 - - ns
0.05 kΩ <= Z
o
< 0.1 kΩ 23 - - ns
0.1 kΩ <= Z
o
< 0.2 kΩ 26 - - ns
0.2 kΩ <= Z
o
< 0.5 kΩ 31 - - ns
0.5 kΩ <= Z
o
< 1 kΩ 47 - - ns
1 kΩ <= Z
o
< 5 kΩ 75 - - ns
ADC inputs ADC_5 to ADC_0 (fast channels); ADC resolution = 10 bit
t
s
sampling time Z
o
< 0.05 kΩ
[3]
15 - - ns
0.05 kΩ <= Z
o
< 0.1 kΩ 18 - - ns
0.1 kΩ <= Z
o
< 0.2 kΩ 20 - - ns
0.2 kΩ <= Z
o
< 0.5 kΩ 24 - - ns
0.5 kΩ <= Z
o
< 1 kΩ 38 - - ns
1 kΩ <= Z
o
< 5 kΩ 62 - - ns
ADC inputs ADC_5 to ADC_0 (fast channels); ADC resolution = 8 bit
t
s
sampling time Z
o
< 0.05 kΩ
[3]
12 - - ns
0.05 kΩ <= Z
o
< 0.1 kΩ 13 - - ns
0.1 kΩ <= Z
o
< 0.2 kΩ 15 - - ns
0.2 kΩ <= Z
o
< 0.5 kΩ 19 - - ns
0.5 kΩ <= Z
o
< 1 kΩ 30 - - ns
1 kΩ <= Z
o
< 5 kΩ 48 - - ns
ADC inputs ADC_5 to ADC_0 (fast channels); ADC resolution = 6 bit
t
s
sampling time Z
o
< 0.05 kΩ
[3]
9- - ns
0.05 kΩ <= Z
o
< 0.1 kΩ 10 - - ns
0.1 kΩ <= Z
o
< 0.2 kΩ 11 - - ns
0.2 kΩ <= Z
o
< 0.5 kΩ 13 - - ns
0.5 kΩ <= Z
o
< 1 kΩ 22 - - ns
1 kΩ <= Z
o
< 5 kΩ 36 - - ns
ADC inputs ADC_11 to ADC_6 (slow channels); ADC resolution = 12 bit
t
s
sampling time Z
o
< 0.05 kΩ
[3]
43 - - ns
0.05 kΩ <= Z
o
< 0.1 kΩ 46 - - ns
0.1 kΩ <= Z
o
< 0.2 kΩ 50 - - ns
0.2 kΩ <= Z
o
< 0.5 kΩ 56 - - ns
0.5 kΩ <= Z
o
< 1 kΩ 74 - - ns
1 kΩ <= Z
o
< 5 kΩ 105 - - ns