Datasheet

MSP430F41x2
MIXED SIGNAL MICROCONTROLLER
SLAS648E -- APRIL 2009 -- REVISED MARCH 2011
44
POST OFFICE BOX 655303  DALLAS, TEXAS 75265
electrical characteristics over recommended ranges of supply voltage and operating free-air
temperature (unless otherwise noted) (continued)
10-bit ADC, temperature sensor and built-in V
MID
PARAMETER
TEST CONDITIONS V
CC
MIN TYP MAX UNIT
I
Tem
p
erature sensor su
p
p
l
y
REFON = 0, INCH
x
=0
A
h,
2.2 V 40 120
A
I
SENSOR
T
e
m
p
e
r
a
t
u
r
e
s
e
n
s
o
r
s
u
p
p
l
y
current (see Note )
R
E
F
O
N
=
0
,
I
N
C
H
x
=
0
A
h
,
ADC10ON = 1, T
A
=25_C
3V 60 160

A
TC
SENSOR
ADC10ON = 1, INCHx = 0Ah
(see Note 2)
2.2 V/3 V 3.55 mV/C
V
Offset,Sensor
Sensor offset voltage
ADC10ON = 1, INCHx = 0Ah
(see Note 2)
--100 100 mV
Temperature sensor voltage
at T
A
=85C
2.2 V/3 V 1195 1295 1395 mV
V
Sensor
Sensor output voltage
(see Note 3)
Temperature sensor voltage
at T
A
=25C
2.2 V/3 V 985 1085 1185
m
V
(
)
Temperature sensor voltage
at T
A
=0C
2.2 V/3 V 895 995 1095
m
V
t
Sensor(sample)
Sample time required if
channel 10 is selected (see
Note 4)
ADC10ON = 1, INCHx = 0Ah,
Error of conversion result  1LSB
2.2 V/3 V 30 s
I
Current into divider at
A
D
C
1
0
O
N
1
I
N
C
H
x
0
B
h
2.2 V NA
A
I
VMID
C
u
r
r
e
n
t
i
n
t
o
d
i
v
i
d
e
r
a
t
channel11 (see Note 5)
A
DC10ON = 1, INCH
x
=0Bh
3V NA

A
V
V
d
i
v
i
d
e
r
a
t
c
h
a
n
n
e
l
1
1
A
DC10ON = 1, INCH
x
=0Bh,
2.2 V 1.06 1.1 1.14
V
V
MID
V
CC
divider at channel 11
A
D
C
1
0
O
N
=
1
,
I
N
C
H
x
=
0
B
h
,
V
MID
is 0.5 x V
CC
3V 1.46 1.5 1.54
V
t
Sample time required if
c
h
a
n
n
e
l
1
1
i
s
s
e
l
e
c
t
e
d
A
DC10ON = 1, INCH
x
=0Bh,
2.2 V 1400
n
s
t
VMID(sample)
channel 11 is selected
(see Note 6)
A
D
C
1
0
O
N
=
1
,
I
N
C
H
x
=
0
B
h
,
Error of conversion result  1LSB
3V 1220
ns
NOTES: 1. The sensor current I
SENSOR
is consumed if (ADC10ON = 1 and REFON = 1), or (ADC10ON = 1 and INCH = 0Ah and sample signal
is high). When REFON = 1, I
SENSOR
is included in I
REF+
. When REFON = 0, I
SENSOR
applies during conversion of the temperature
sensor input (INCH = 0Ah).
2. The following formula can be used to calculate the temperature sensor output voltage:
V
Sensor,typ
=TC
Sensor
( 273 + T [C] ) + V
Offset,sensor
[mV] or
V
Sensor,typ
=TC
Sensor
T[C] + V
Sensor
(T
A
=0C) [mV]
3. Results based on characterization and/or production test, not TC
Sensor
or V
Offset,sensor
.
4. The typical equivalent impedance of the sensor is 51 k. The sample time required includes the sensor-on time t
SENSOR(on)
.
5. No additional current is needed. The V
MID
is used during sampling.
6. The on -time t
VMID(on)
is included in the sampling time t
VMID(sample)
; no additional on time is needed.
Timer0_A3, Timer1_A5
PARAMETER TEST CONDITIONS V
CC
MIN MAX UNIT
f
T
i
m
e
r
A
c
l
o
c
k
f
r
e
q
u
e
n
c
y
Internal: SMCLK, ACLK,
E
x
t
e
r
n
a
l
:
T
A
C
L
K
I
N
C
L
K
2.2 V 8
M
H
z
f
TA
Timer
_
A
clock
f
requency
E
x
ternal: T
A
CLK, INCLK,
Duty cycle = 50% 10%
3V 10
MHz
t
TA,cap
Timer_A, capture timing TA0, TA1, TA2 2.2 V/3 V 20 ns