Datasheet
DRAFT
DRAFT DRAFT DR
DRAFT DRAFT DRAFT
D
RAF
DRAFT DRAFT DRA
F
T D
RAFT DR
AFT D
DRA
F
T DRAFT DRAFT
D
RAFT
DRAFT
D
RAFT
DRA
LPC15xx All information provided in this document is subject to legal disclaimers. © NXP B.V. 2014. All rights reserved.
Objective data sheet Rev. 1.0 — 16 January 2014 76 of 98
NXP Semiconductors
LPC15xx
32-bit ARM Cortex-M3 microcontroller
[1] The input impedance of ADC channel 0 is higher than for all other channels.
[2] The differential linearity error (E
D
) is the difference between the actual step width and the ideal step width.
See Figure 38
.
[3] The integral non-linearity (E
L(adj)
) is the peak difference between the center of the steps of the actual and
the ideal transfer curve after appropriate adjustment of gain and offset errors. See Figure 38
.
[4] The offset error (E
O
) is the absolute difference between the straight line which fits the actual curve and the
straight line which fits the ideal curve. See Figure 38
.
[5] The full-scale error voltage or gain error (E
G
) is the difference between the straight line fitting the actual
transfer curve after removing offset error, and the straight line which fits the ideal transfer curve. See
Figure 38
.
[6] T
amb
= 25 C; maximum sampling frequency f
s
= 2 Msamples/s and analog input capacitance C
ia
= 0.1 pF.
[7] Input resistance R
i
is inversely proportional to the sampling frequency and the total input capacity including
C
ia
: R
i
1 / (f
s
C
i
)
Table 24. 12-bit ADC static characteristics
T
amb
=
40
C to +105
C; V
DD
= 2.4 V to 3.6 V; VREFP = V
DDA
; V
SSA
= 0; VREFN = V
SSA
.
Symbol Parameter Conditions Min Max Unit
V
IA
analog input voltage
[1]
0V
DDA
V
C
ia
analog input
capacitance
-0.1pF
f
clk(ADC)
ADC clock frequency V
DDA
2.7 V 50 MHz
V
DDA
2.4 V 25 MHz
f
s
sampling frequency V
DDA
2.7 V - 2 Msamples/s
V
DDA
2.4 V - 1 Msamples/s
E
D
differential linearity
error
[2]
-+/- 2LSB
E
L(adj)
integral non-linearity
[3]
-+/- 2LSB
E
O
offset error
[4]
-+/- 3LSB
V
err(fs)
full-scale error voltage 2 Msamples/s
[5]
- +/- 0.12 %
1 Msamples/s +/- 0.07 %
R
i
input resistance f
s
= 2 Msamples/s
[6][7]
0.1 - M