Datasheet

MSP430F23x0
MIXED SIGNAL MICROCONTROLLER
SLAS518A -- AUGUST 2006 -- REVISED MAY 2007
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)
DCO with external resistor R
OSC
(see Note)
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
f
DCO out
p
ut
f
re
q
uenc
y
DCOR = 1,
R
S
E
L
x
4
D
C
O
x
3
M
O
D
x
0
2.2 V 1.8
M
H
z
f
DCO,ROSC
D
C
O
o
u
t
p
u
t
f
r
e
q
u
e
n
c
y
with R
OSC
RSELx = 4, DCO
x
=3,MOD
x
=0,
T
A
=25°C
3V 1.95
MHz
D
t
Temperature drift
DCOR = 1,
RSELx = 4, DCOx = 3, MODx = 0
2.2 V/3 V ±0.1 %/°C
D
V
Drift with V
CC
DCOR = 1,
RSELx = 4, DCOx = 3, MODx = 0
2.2 V/3 V 10 %/V
NOTE : R
OSC
= 100kΩ. Metal film resistor, type 0257. 0.6 watt with 1% tolerance and T
K
= ±50ppm/°C.
typical characteristics -- DCO with external resistor R
OSC
0.01
0.10
1.00
10.00
10.00 100.00 1000.00 10000.00
R
OSC
-- External Resistor -- kΩ
DCO Frequency -- MHz
Figure 13. DCO Frequency vs R
OSC
,
V
CC
=2.2V,T
A
=25°C
RSELx = 4
0.01
0.10
1.00
10.00
10.00 100.00 1000.00 10000.00
R
OSC
-- External Resistor -- kΩ
DCO Frequency -- MHz
Figure 14. DCO Frequency vs R
OSC
,
V
CC
=3.0V,T
A
=25°C
RSELx = 4
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
--50 --25 0 25 50 75 100
T
A
-- Temperature -- °C
DCO Frequency -- MHz
Figure 15. DCO Frequency vs Temperature,
V
CC
=3.0V
R
OSC
= 100k
R
OSC
= 270k
R
OSC
=1M
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
2.0 2.5 3.0 3.5 4.0
V
CC
-- Supply Voltage -- V
DCO Frequency -- MHz
Figure 16. DCO Frequency vs V
CC
,
T
A
=25°C
R
OSC
= 100k
R
OSC
= 270k
R
OSC
=1M