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MSP430x11x1
MIXED SIGNAL MICROCONTROLLER
SLAS241C – SEPTEMBER 1999 – REVISED JUNE 2000
31
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
outputs P1.x, P2.x, TAx
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
f
(P20)
P2.0/ACLK, C
L
= 20 pF 2.2 V/3 V f
System
f
(TAx)
Output frequency
TA0, TA1, TA2, C
L
= 20 pF
Internal clock source, SMCLK signal applied (see Note 16)
2.2 V/3 V dc f
System
MHz
f
SMCLK
= f
LFXT1
= f
XT1
40% 60%
P1 4/SMCLK
f
SMCLK
= f
LFXT1
= f
LF
2 2 V/3 V
35% 65%
P1
.
4/SMCLK
,
C
L
= 20 pF
f
SMCLK
= f
LFXT1/n
2
.
2
V/3
V
50%–
15 ns
50%
50%+
15 ns
t
(Xdc)
Duty cycle of O/P
frequency
f
SMCLK
= f
DCOCLK
2.2 V/3 V
50%–
15 ns
50%
50%+
15 ns
P2 0/ACLK
f
P20
= f
LFXT1
= f
XT1
40% 60%
P2
.
0/ACLK
,
C
L
=
20
p
F
f
P20
= f
LFXT1
= f
LF
2.2 V/3 V
30% 70%
C
L
=
20
F
f
P20
= f
LFXT1/n
50%
t
(TAdc)
TA0, TA1, TA2, C
L
= 20 pF, Duty cycle = 50% 2.2 V/3 V 0 ±50 ns
NOTE 16: The limits of the system clock MCLK has to be met. MCLK and SMCLK can have different frequencies.
Comparator_A (see Note 17)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
I
(DD)
CAON=1 CARSEL=0 CAREF=0
V
CC
= 2.2 V 25 40
µA
I
(DD)
CAON
=
1
,
CARSEL
=
0
,
CAREF
=
0
V
CC
= 3 V 45 60
µ
A
I
(
Refladder/
CAON=1, CARSEL=0,
CAREF=1/2/3 No load at
V
CC
= 2.2 V 30 50
µA
(Refladder/
RefDiode)
CAREF
=
1/2/3
,
No
load
at
P2.3/CA0/TA1 and P2.4/CA1/TA2
V
CC
= 3 V 45 71
µ
A
V
(IC)
Common-mode input
voltage
CAON =1 V
CC
= 2.2 V/3 V 0 V
CC
–1 V
V
(Ref025)
See Figure 5
Voltage @ 0.25 V
CC
node
V
CC
PCA0=1, CARSEL=1, CAREF=1,
No load at P2.3/CA0/TA1 and
P2.4/CA1/TA2, See Figure 5
V
CC
= 2.2 V/3 V 0.23 0.24 0.25
V
(Ref050)
See Figure 5
Voltage @ 0.5 V
CC
node
V
CC
PCA0=1, CARSEL=1, CAREF=2,
No load at P2.3/CA0/TA1 and
P2.4/CA1/TA2, See Figure 5
V
CC
= 2.2 V/3 V 0.47 0.48 0.5
V
(R fVT)
PCA0=1, CARSEL=1, CAREF=3,
No load at P2 3/CA0/TA1 and
V
CC
= 2.2 V 430 550 645
mV
V
(RefVT)
No
load
at
P2
.
3/CA0/TA1
and
P2.4/CA1/TA2
V
CC
= 3 V 450 565 660
mV
V
(offset)
Offset voltage See Note 18 V
CC
= 2.2 V/3 V –30 30 mV
V
hys
Input hysteresis CAON=1 V
CC
= 2.2 V/3 V 0 0.7 1.4 mV
T
A
= 25°C, Overdrive 10 mV, With-
V
CC
= 2.2 V 160 210 300
ns
t
(LH)
A
out filter: CAF=0
V
CC
= 3 V 90 150 200
ns
t
(response
LH)
T
A
= 25°C, Overdrive 10 mV, With
V
CC
= 2.2 V 1.6 1.9 3.4
µs
A
filter: CAF=1
V
CC
= 3 V 1.1 1.5 2.6
µ
s
T
A
= 25°C,
Overdrive 10 mV without filter:
V
CC
= 2.2 V 160 210 300
ns
t
(res
p
onse
HL)
Overdrive
10
mV
,
without
filter:
CAF=0
V
CC
= 3 V 90 150 200
ns
(res onse HL)
T
A
= 25°C,
V
CC
= 2.2 V 1.6 1.9 3.4
µs
A
Overdrive 10 mV, with filter: CAF=1
V
CC
= 3 V 1.1 1.5 2.6
µ
s
NOTES: 17. The leakage current for the Comparator_A terminals is identical to I
lkg(Px.x)
specification.
18. 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.