Datasheet

MSP430x22x2, MSP430x22x4
MIXED SIGNAL MICROCONTROLLER
SLAS504B − JULY 2006 − REVISED JULY 2007
37
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443
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 1)
PARAMETER TEST CONDITIONS VCC MIN TYP MAX UNIT
f
DCO output frequenc
y
DCOR = 1,
RSELx 4 DCOx 3 MODx 0
2.2 V 1.8
MHz
f
DCO,ROSC
DCO
output
frequency
with R
OSC
RSELx = 4, DCOx = 3, MODx = 0,
T
A
= 25°C
3 V 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
NOTES: 1. 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 − kW
DCO Frequency − MHz
Figure 14. DCO Frequency vs R
OSC
,
V
CC
= 2.2 V, T
A
= 255C
RSELx = 4
0.01
0.10
1.00
10.00
10.00 100.00 1000.00 10000.00
R
OSC
− External Resistor − kW
DCO Frequency − MHz
Figure 15. DCO Frequency vs R
OSC
,
V
CC
= 3.0 V, T
A
= 255C
RSELx = 4
0.00
0.25
0.50
0.75
1.00
1.25
1.50
1.75
2.00
2.25
2.50
−50.0 −25.0 0.0 25.0 50.0 75.0 100.0
T
A
− Temperature − 5C
DCO Frequency − MHz
Figure 16. DCO Frequency vs Temperature,
V
CC
= 3.0 V
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 17. DCO Frequency vs V
CC
,
T
A
= 255C
R
OSC
= 100k
R
OSC
= 270k
R
OSC
= 1M