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參數(shù)資料
| 型號： | LMX2335UTM/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 1200 MHz, PDSO16 |
| 封裝： | PLASTIC, TSSOP-16 |
| 文件頁數(shù)： | 4/48頁 |
| 文件大?。?/td> | 3127K |
| 代理商： | LMX2335UTM/NOPB |
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Electrical Characteristics (Continued)
V
CC =VP RF1=VP RF2 = 3.0V, 40C
≤ T
A
≤ +85C, unless otherwise specified
Symbol
Parameter
Conditions
Value
Units
Min
Typ
Max
PHASE NOISE CHARACTERISTICS
L
N(f) RF2
RF2 Synthesizer Normalized Phase
Noise Contribution
TCXO Reference Source
ID
o RF2 Bit = 1
-212.0
dBc/
Hz
L(f) RF2
RF2 Synthesizer
Single Side Band
Phase Noise
Measured
LMX2335U
f
IN RF2 = 900 MHz
f = 1 kHz Offset
FφRF2 = 200 kHz
Loop Bandwidth = 12 kHz
N = 4500
F
OSC =10MHz
V
OSC = 0.632 VPP
ID
o RF2 Bit = 1
PWDN RF1 Bit = 1
T
A = +25C
-85.94
dBc/
Hz
LMX2336U
f
IN RF2 = 900 MHz
f = 1 kHz Offset
FφRF2 = 200 kHz
Loop Bandwidth = 12 kHz
N = 4500
F
OSC =10MHz
V
OSC = 0.632 VPP
ID
o RF2 Bit = 1
PWDN RF1 Bit = 1
T
A = +25C
-85.94
dBc/
Hz
Note 4: Some of the values in this range are illegal divide ratios (B < A). To obtain continuous legal division, the Minimum Divide Ratio must be calculated. Use N
≥ P * (P1), where P is the value selected for the prescaler.
Note 5: Refer to the LMX2335U and LMX2336U fIN Sensitivity Test Setup section
Note 6: Refer to the LMX2335U and LMX2336U Charge Pump Test Setup section
Note 7: Refer to the Charge Pump Current Specification Definitions for details on how these measurements are made.
Note 8: Refer to the LMX2335U and LMX2336U OSCin Sensitivity Test Setup section
Note 9: Refer to the LMX2335U and LMX2336U Serial Data Input Timing section
Note 10: Normalized Phase Noise Contribution is defined as : LN(f) = L(f) 20 log (N) 10 log (Fφ), where L(f) is defined as the single side band phase noise
measured at an offset frequency, f, ina1Hz bandwidth. The offset frequency, f, must be chosen sufficiently smaller than the PLL’s loop bandwidth, yet large enough
to avoid substantial phase noise contribution from the reference source. N is the value selected for the feedback divider and Fφ is the RF1/RF2 phase detector
comparison frequency..
Note 11: The synthesizer phase noise is measured with the LMX2335TMEB/LMX2335SLBEB or LMX2336TMEB/LMX2336SLBEB/LMX2336SLEEB Evaluation
boards and the HP8566B Spectrum Analyzer.
LMX2335U/LMX2336U
www.national.com
12
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| LMX2335UTMX | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications |
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| LMX2336LSLB | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Personal Communications |
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