Datasheet

LPC408X_7X All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet Rev. 3.1 — 1 September 2014 108 of 138
NXP Semiconductors
LPC408x/7x
32-bit ARM Cortex-M4 microcontroller
[1] C
L
= 10 pF; results from measurements on silicon samples over process corners and over the full temperature range T
amb
= -40 C to
+85 C.
[2] Input hysteresis is relative to the reference input channel and is software programmable.
[1] Maximum values are derived from worst case simulation (V
DDA
= 2.6 V; T
amb
= 85 C; slow process
models).
[2] Settling time applies to switching between comparator and ADC channels.
DV
O
output voltage variation 0 - V
DDA
V
V
offset
offset voltage V
IC
= 0.1 V - 4 to +4.2 - mV
V
IC
= 1.5 V - 2-mV
V
IC
= 2.8 V - 2.5 mV
Dynamic characteristics
t
startup
start-up time nominal process - 4 - s
t
PD
propagation delay HIGH to LOW; V
DDA
= 3.3 V;
V
IC
= 0.1 V; 50 mV overdrive input
[1]
122 130 142 ns
V
IC
= 0.1 V; rail-to-rail input
[1]
173 189 233 ns
V
IC
= 1.5 V; 50 mV overdrive input
[1]
101 108 119 ns
V
IC
= 1.5 V; rail-to-rail input
[1]
114 127 162 ns
V
IC
= 2.9 V; 50 mV overdrive input
[1]
123 134 143 ns
V
IC
= 2.9 V; rail-to-rail input
[1]
79 91 120 ns
t
PD
propagation delay LOW to HIGH; V
DDA
= 3.3 V;
V
IC
= 0.1 V; 50 mV overdrive input
[1]
221 232 254 ns
V
IC
= 0.1 V; rail-to-rail input
[1]
59 63 68 ns
V
IC
= 1.5 V; 50 mV overdrive input
[1]
183 229 249 ns
V
IC
= 1.5 V; rail-to-rail input
[1]
147 174 213 ns
V
IC
= 2.9 V; 50 mV overdrive input
[1]
171 192 216 ns
V
IC
= 2.9 V; rail-to-rail input
[1]
235 305 450 ns
V
hys
hysteresis voltage positive hysteresis; V
DDA
= 3.0 V;
V
IC
= 1.5 V
[2]
- 5, 10, 20 - mV
V
hys
hysteresis voltage negative hysteresis; V
DDA
= 3.0 V;
V
IC
= 1.5 V
[2]
- 5, 10, 20 - mV
R
lad
ladder resistance - - 1.034 - M
Table 31. Comparator characteristics
…continued
V
DDA
= 3.0 V and T
amb
= 25  C unless noted otherwise.
Symbol Parameter Conditions Min Typ Max Unit
Table 32. Comparator voltage ladder dynamic characteristics
Symbol Parameter Conditions Min Typ Max Unit
t
s(pu)
power-up settling
time
to 99% of voltage
ladder output
value
[1]
-- 30 s
t
s(sw)
switching settling
time
to 99% of voltage
ladder output
value
[1]
[2]
-- 15 s