LMX2485Q-Q1 Datasheet, PDF (9/50 Pages) Texas Instruments – Low Power Dual PLLatinum Frequency Synthesizers

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LMX2485Q-Q1
SNOSCP7A – MARCH 2013 – REVISED JANUARY 2016
Sensitivity (continued)
Typical characteristics do not imply any sort of specification. Ensured specifications are in the Electrical Characteristics
section.
20
20
10
VCC = 2.5V, 3.0V, and 3.6V
0
VCC = 3.6V
-10
VCC = 3.0V
-20
VCC =2.5V
-30
-40
-50
0
5
10
15
20
fOSCin (MHz)
T_A = 25°C, OSC_2X = 1
Figure 8. OSCin Sensitivity
10
TA = -40^oC, 25^oC, and 85^oC
0
-10
TA = 85^oC
-20
-30
-40
TA = 25^oC
25
-50
0
5
10
15
20
fOSCin (MHz)
V_CC = 3 V, OSC_2X = 1
Figure 9. OSCin Sensitivity
TA = -40^oC
25
6.8.2 FinRF Input Impedance
Marker 1:
50 MHz
Marker 2:
1.0 GHz
Marker 3:
2.0 GHz
Marker 4:
3.0 GHz
Start 1.0 GHz
Stop 3.5 GHz
21
3
4
FREQUENCY (MHz)
50
100
200
300
400
500
600
700
800
900
1000
1100
1200
Figure 10. FinRF Input Impedance
Table 1. RF PLL Input Impedance
REAL (Ω)
670
531
452
408
373
337
302
270
241
215
192
172
154
IMAGINARY (Ω)
–276
–247
–209
–212
–222
–231
–237
–239
–236
–231
–221
–218
–209
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