LMX2541SQ2060E/NOPB National Semiconductor, LMX2541SQ2060E/NOPB Datasheet - Page 16

• Manufacturer Part Number: LMX2541SQ2060E/NOPB
• Description: IC PLL FREQ SYNTH W/VCO 36LLP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Clock/Frequency Synthesizer (RF)r

Specifications of LMX2541SQ2060E/NOPB

• Pll: Yes
• Input: Clock
• Output: Clock
• Number Of Circuits: 1
• Ratio - Input:output: 2:2
• Differential - Input:output: No/No
• Frequency - Max: 2.24GHz
• 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: 2.24GHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LMX2541SQ2060E

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The above plot shows how much the VCO phase noise typically change over temperature relative to room temperature. The typical values for represent an
average over all frequencies and part options and therefore there are some small variations over part options and frequencies that are not shown .VCO phase
noise numbers room temperature are reported in the electrical specifications. A negative value indicates a phase noise improvement.
Relative VCO Phase Noise Over Temperature Drift
(AC_TEMP_COMP = 24, Vcc = 3.3 V)
The above table shows the typical degradation for VCO phase noise when the VCO is locked at one temperature and the tem-
perature is allowed to drift to another temperature. A negative value indicates a phase noise improvement.
Lock
-40
-40
-40
25
25
25
85
85
85
Temperature
Current
-40
-40
-40
25
85
25
85
25
85
VCO Phase Noise Degradation vs. Temperature and Offset
10 kHz
+0.4
+0.3
+0.9
+0.2
+0.6
+0.2
+0.2
+0.6
This is the default condition to which these other numbers are normalized to.
(VCO Relocked at Each Temperature
Vcc = 3.3 V, AC_TEMP_COMP = 5)
Phase Noise Change in Celsius for Various Offsets
100 kHz
+0.5
+2.0
+1.5
+0.2
+1.8
-2.0
-2.2
-2.2
16
1 MHz
+0.5
+2.4
+2.0
+0.3
+2.2
-1.6
-1.7
-1.7
10 MHz
+0.5
+2.5
+2.0
+0.2
+2.3
-1.8
-2.0
-1.9
30073312
20 MHz
+0.4
+2.3
+1.9
+0.2
+2.1
-1.6
-1.8
-1.8