Datasheet
0
FREQUENCY (MHz)
1
4
9
POWER (dBm)
500 2000
6
3
1000 1500
T
A
= 85
o
C
2500
8
5
2
7
0
-1
T
A
= 25
o
C
T
A
= -40
o
C
0
FREQUENCY (MHz)
-6
0
10
POWER (dBm)
500 2000
4
-2
1000 1500
DIVGAIN=3
2500
8
2
-4
DIVGAIN=6
DIVGAIN=9
DIVGAIN=15
DIVGAIN=12
6
-8
-10
0
FREQUENCY (MHz)
1
4
9
POWER (dBm)
500 2000
6
3
1000 1500
Vcc = 3.15 V
2500
8
5
2
Vcc = 3.3 V
Vcc = 3.45 V
7
0
-1
0
FREQUENCY (MHz)
-6
0
10
POWER (dBm)
500 2000
4
-2
1000 1500
OUTTERM=3
2500
8
2
-4
OUTTERM=6
OUTTERM=9
OUTTERM=15
OUTTERM=12
6
-8
-10
LMX2541SQ2060E, LMX2541SQ2380E
LMX2541SQ2690E, LMX2541SQ3030E
LMX2541SQ3320E, LMX2541SQ3740E
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SNOSB31I –JULY 2009–REVISED FEBRUARY 2013
Table 2. Change in Output Power in Bypass Mode as a Function of VCOGAIN and OUTTERM
VCOGAIN
3 6 9 12 15
3 -9.7 -8.4 -7.9 -7.8 -7.9
6 -6.6 -4.5 -3.6 -3.4 -3.6
OUTTERM 9 -5.7 -3.1 -1.7 -1.3 -1.3
12 -5.4 -2.5 -0.8 +0.0 +0.1
15 -5.3 -2.2 -0.3 +0.8 +1.1
Output Power
vs. Output Power
Voltage vs.
(VCO_DIV > 1, DIVGAIN = 12, OUTTERM = 12, OUTTERM and FREQUENCY
T
A
= 25°C (VCO_DIV > 1, T
A
= 25 °C, Vcc = 3.3 V, DIVGAIN = 12
(1)
)
(1)
)
Figure 17. Figure 18.
Output Power
vs.
Temperature Output Power
( VCO_DIV > 1, DIVGAIN = OUTTERM = 12, vs.
Vcc = 3.3 V DIVGAIN and FREQUENCY
(1)
)
(1)
(VCO_DIV > 1, T
A
= 25 °C, Vcc = 3.3 V, OUTTERM = 12 )
Figure 19. Figure 20.
Table 3. Change in Output Power in Divided Mode as a Function of DIVGAIN and OUTTERM
(1)
DIVGAIN
3 6 9 12 15
(1) The measurement of the output power is sensitive to the test circuit. All the numbers in the electrical specifications and typical
performance curves were obtained from a characterization setup that accommodate temperature testing and changing of parts. In a
more optimized setup the measured RF output power is typically on the order of 1.5 to 2.4 dB higher.
(1) The table shows the RELATIVE output power to the case of VCOGAIN = OUTTERM = 12.
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