Datasheet

MSP430F471x3, MSP430F471x6, MSP430F471x7
MIXED SIGNAL MICROCONTROLLER
SLAS626C -- OCTOBER 2008 -- REVISED MARCH 2011
46
POST OFFICE BOX 655303  DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature (unless otherwise
noted) (continued)
Comparator_A (see Note 1)
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX UNIT
I
C
A
O
N
1
C
A
R
S
E
L
0
C
A
R
E
F
0
2.2 V 25 40
A
I
(CC)
C
A
ON = 1, C
A
RSEL = 0, C
A
REF = 0
3V 45 60

A
I
C
A
ON = 1, C
A
RSEL = 0, C
A
REF = 1
/
2
/
3,
2.2 V 30 50
A
I
(Refladder/RefDiode)
C
A
O
N
=
1
,
C
A
R
S
E
L
=
0
,
C
A
R
E
F
=
1
/
2
/
3
,
No load at P2.6/CA0 and P2.7/CA1
3V 45 80

A
V
(Ref025)
Voltage @ 0.25 V
CC
node
V
CC
PCA0 = 1, CARSEL = 1, CAREF = 1,
No load at P2.6/CA0 and P2.7/CA1
2.2 V / 3 V 0.23 0.24 0.25
V
(Ref050)
Voltage @ 0.5 V
CC
node
V
CC
PCA0 = 1, CARSEL = 1, CAREF = 2,
No load at P2.6/CA0 and P2.7/CA1
2.2V / 3 V 0.47 0.48 0.5
V
See Fi
g
ure 17 and
PCA0 = 1, CARSEL = 1, CAREF = 3,
N
o
l
o
a
d
a
t
P
2
6
/
C
A
0
a
n
d
P
2
7
/
C
A
1
2.2 V 390 480 540
m
V
V
(RefVT)
S
e
e
F
i
g
u
r
e
1
7
a
n
d
Figure 18
No load at P2.6
/
C
A
0 and P2.7
/
C
A
1,
T
A=
85C
3V 400 490 550
m
V
V
IC
Common-mode input
voltage range
CAON = 1 2.2 V / 3 V 0 V
CC
-- 1 V
V
p
-- V
S
Offset voltage SeeNote2 2.2 V / 3 V -- 3 0 30 mV
V
hys
Input hysteresis CAON = 1 2.2 V / 3 V 0 0.7 1.4 mV
T
A
=25C,
2.2 V 80 165 300
n
s
t
(
S
e
e
N
o
t
e
3
)
T
A
=
2
5
C
,
Overdrive 10 mV, without filter: CAF = 0
3V 70 120 240
ns
t
(response LH and HL)
(See Note 3)
T
A
=25C
2.2 V 1.4 1.9 2.8
s
T
A
=
2
5
C
Overdrive 10 mV, with filter: CAF = 1
3V 0.9 1.5 2.2
s
NOTES: 1. The leakage current for the Comparator_A terminals is identical to I
lkg(Px.x)
specification.
2. The input offset voltage can be cancelled by using the CAEX bit to invert the Comparator_A inputs on successive measurements.
The two successive measurements are then summed together.
3. The response time is measured at P2.6/CA0 with an input voltage step and the Comparator_A already enabled (CAON = 1). If CAON
is set at the same time, a settling time of up to 300 ns is added to the response time.