Datasheet

0 7000
f
ExtVCOin
(MHz)
20
10
0
-10
-20
-30
-40
p
EXTVCOin
(dBm)
50003000
T
A
= -40
o
C
1000 2000 4000 6000
T
A
= 85
o
C
T
A
= 25
o
C
8000
Guaranteed Operating
Range
f
OSCin
(MHz)
20
10
0
-10
-20
-30
-40
INPUT POWER (dBm)
1000
10
100
1
Guaranteed
Operating
Range
LMX2541SQ2060E, LMX2541SQ2380E
LMX2541SQ2690E, LMX2541SQ3030E
LMX2541SQ3320E, LMX2541SQ3740E
www.ti.com SNOSB31I –JULY 2009–REVISED FEBRUARY 2013
OSCin Sensitivity for Single-Ended SINE Wave
The above chart shows the typical sensitivity for a sine wave. Note that at lower frequencies, there is a constant slope that
suggests that the part fails when the slew rate falls below 27 V/us. The electrical specifications call for a minimum of 150 V/us to
ensure margin. Also, as some of the other performance graphs show, the OSCin slew rate has an impact on fractional spurs and
phase noise as well. It is recommended to design to the electrical specifications, not the typical performance plots.
Variation over voltage and temperature is typically very small and on the order than less ±1 dB.
Figure 22.
SINE wave ExtVCOin Sensitivity
The above plot shows the ExtVCOin sensitivity which applies only when the device is being used in External VCO mode.
Variation over voltage is typically very small and on the order of less than ± 1 dB.
Figure 23.
Copyright © 2009–2013, Texas Instruments Incorporated Submit Documentation Feedback 23
Product Folder Links: LMX2541SQ2060E LMX2541SQ2380E LMX2541SQ2690E LMX2541SQ3030E
LMX2541SQ3320E LMX2541SQ3740E