SA8025A Datasheet, PDF (18/23 Pages) NXP Semiconductors – Low-voltage 1.8GHz fractional-N synthesizer

Philips Semiconductors
1.8GHz low-voltage Fractional-N synthesizer
Product specification
SA8025A
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
0
–5
–10
–15
V_DD/V_DDA
–20
3/3V
3/5V
5/5V
–25
N=100
–30
10 15 20 25 30 35 40 45 50 55
FREQUENCY (MHz)
SR00569
Figure 18. Reference Divider Minimum Input Power vs
Frequency and Supply
0
–5
T_A =amb,
PA=1,
–10
N=100
V_DD/V_DDA
3/3V
3/5V
5/5V
5
V_DD= 3V,
0
V_DDA= 5V,
N = 100
–5
–10
t = –40°C
–15
t = 25°C
t = 85°C
–20
10
15
20
25
30
35
40
FREQUENCY (dBm)
SR00572
Figure 21. Reference Divider Minimum Input Power vs
Frequency and Temperature
–10
V_DD =3V,
V_DDA=5V,
PA=1,
N=100
–15
t = –40°C
t = 25°C
t = 85°C
–15
–20
–20
–25
–30
30
50
70
90
110
130
150
FREQUENCY (MHz)
SR00570
Figure 19. Auxiliary Divider Minimum Input Power vs
Frequency and Supply
0
T_A = amb,
–5 _PA=0,
N=25
V_DD/V_DDA
–10
–15
3/3V
–20
3/5V
5/5V
–25
–25
30
50
70
FREQUENCY (MHz)
90
SR00573
Figure 22. Auxiliary Divider Minimum Input Power vs
Frequency and Temperature
0
V_DD=3V,
V_DDA=5V
–5
PA=0,
N=25
–10
t = –40°C
t = 25°C
t = 85°C
–15
–30
50
100
150
200
FREQUENCY (MHz)
250
SR00571
Figure 20. Auxiliary Divider Minimum Input Power vs
Frequency and Supply
–20
50
100
150
FREQUENCY (MHz)
200
SR00574
Figure 23. Auxiliary Divider Minumum Input Power vs
Frequency and Temperature
1996 Oct 15
18