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LMX2542LQX2121 Datasheet(PDF) 7 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LMX2542LQX2121
Description  PLLatinum Cellular and GPS Frequency Synthesizer System with Integrated VCO
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LMX2542LQX2121 Datasheet(HTML) 7 Page - National Semiconductor (TI)

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Electrical Characteristics (Continued)
V
CC =VDD = CE = 2.8V, TA = +25˚C, unless otherwise specified
Symbol
Parameter
Conditions
Value
Units
Min
Typ
Max
RF VCO
SPURS
RF
RF Synthesizer Reference Spurs
OSC_FREQ Bit = 0 or 1
IF_EN Bit = 0
−75
dBc
HS
RF
RF VCO Harmonic Suppression
2
ND Harmonic
OB_CRL[1:0] Word = 11
−25
dBc
3
RD Harmonic
OB_CRL[1:0] Word = 11
−25
dBc
t
RFLOCK
Channel Switch Lock Time
(Note 6)
f
INITIAL = 2087.73 MHz
f
FINAL = 2155.14 MHz
1.0
1.3
ms
IF SYNTHESIZER SYSTEM PARAMETERS
f
Fin
IF Synthesizer Operating Frequency
(Note 7)
SPI_DEF Bit = 1
IF_FREQ[1:0] Word = 00
170.76
MHz
SPI_DEF Bit = 1
IF_FREQ[1:0] Word = 01
(Default)
367.20
MHz
SPI_DEF Bit = 1
IF_FREQ[1:0] Word = 10
440.76
MHz
fφIF
IF Synthesizer Phase Detector
Frequency
120
kHz
p
Fin
IF Synthesizer Input Sensitivity
-12
0
dBm
I
CPoutIF
IF Synthesizer Charge Pump Output
Current
IF_CUR[1:0] Word = 00
100
µA
IF_CUR[1:0] Word = 01
200
µA
IF_CUR[1:0] Word = 10
300
µA
IF_CUR[1:0] Word = 11
800
µA
REFERENCE OSCILLATOR PARAMETERS
f
OSCin
Reference Oscillator Input Operating
Frequency
(Note 8)
OSC_FREQ Bit = 0
19.20
MHz
OSC_FREQ Bit = 1
19.68
MHz
v
OSCin
Reference Oscillator Input Sensitivity
0.2
V
CC
V
PP
www.national.com
7


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