LMX2541SQE3740E/NOPB National Semiconductor, LMX2541SQE3740E/NOPB Datasheet - Page 20

• Manufacturer Part Number: LMX2541SQE3740E/NOPB
• Description: IC PLL FREQ SYNTH W/VCO 36LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Clock/Frequency Synthesizer (RF)r

Specifications of LMX2541SQE3740E/NOPB

• Pll: Yes
• Input: Clock
• Output: Clock
• Number Of Circuits: 1
• Ratio - Input:output: 2:2
• Differential - Input:output: No/No
• Frequency - Max: 4GHz
• Divider/multiplier: Yes/No
• Voltage - Supply: 3.15 V ~ 3.45 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 36-LLP
• Frequency-max: 4GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMX2541SQE3740ETR

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RFout Output Impedance vs. VCOGAIN (Bypass Mode)
This is for the VCO divider in bypass mode (VCO_DIV=1) and the RFout pin powered up. OUTTERM was set to 12.
(MHz)
Freq.
1000
1200
1400
1600
1800
2000
2200
2400
2600
2800
3000
3200
3400
3600
3800
4000
4200
4400
4600
4800
5000
100
200
400
600
800
50
128.1
168.1
Real
10.7
12.2
13.7
15.2
14.5
15.6
14.2
12.2
11.5
10.6
13.1
17.6
29.0
38.2
43.5
48.0
62.4
87.0
3.8
4.8
5.4
5.5
5.8
7.0
9.2
VCOGAIN=3
Imaginary
106.0
119.3
137.9
149.4
153.7
134.7
15.1
20.7
26.3
28.6
30.9
33.2
35.5
39.5
42.9
47.6
51.3
57.9
67.1
77.3
88.1
96.0
99.4
2.1
4.1
5.7
9.4
109.7
145.4
Real
12.1
13.4
14.7
15.9
17.2
16.4
17.4
16.0
14.1
13.7
13.1
15.7
20.0
30.6
38.0
41.6
45.9
56.4
76.0
5.5
6.1
6.8
7.5
8.1
9.6
VCOGAIN=6
Imaginary
109.8
126.6
138.1
145.6
135.5
10.0
15.4
20.8
26.1
27.9
29.7
31.5
33.3
37.4
40.7
45.3
48.7
55.3
64.0
73.2
82.8
90.2
94.4
99.0
1.9
3.9
6.0
124.9
Real
10.7
12.6
15.4
16.3
17.1
18.0
18.8
17.9
18.7
17.4
15.6
15.3
14.8
17.3
21.1
30.9
36.4
38.9
43.1
49.8
65.4
93.0
7.3
7.8
8.7
9.8
20
VCOGAIN=9
Imaginary
101.9
117.6
129.5
140.1
138.0
10.6
15.7
20.8
25.6
26.9
28.2
29.5
30.8
35.0
38.2
42.8
46.5
52.4
60.5
69.0
77.4
83.6
87.3
92.0
1.8
3.7
6.3
105.4
Real
10.9
12.4
13.7
15.8
19.0
19.3
19.7
20.1
20.5
19.6
20.3
19.0
17.2
17.0
16.3
18.4
21.7
30.2
34.1
35.5
37.2
42.3
54.3
76.7
9.5
9.8
VCOGAIN=12
Imaginary
109.5
122.2
135.9
141.1
11.0
15.7
20.3
24.6
25.5
26.4
27.4
28.3
32.5
35.6
40.1
43.5
49.0
56.5
64.2
71.8
76.7
80.5
85.1
94.2
1.7
3.6
6.5
102.4
Real
10.1
10.3
11.4
13.1
14.5
16.7
19.8
20.0
20.2
20.5
20.7
19.8
20.4
19.2
17.3
17.1
16.4
18.4
21.5
29.8
33.4
34.8
36.0
40.8
52.3
74.0
VCOGAIN=15
Imaginary
108.3
121.2
135.5
141.9
11.0
15.6
20.1
24.1
25.0
25.9
26.8
27.7
31.9
35.0
39.4
42.5
48.3
55.7
63.3
70.8
75.6
79.4
83.7
93.0
1.7
3.6
6.6