LMX2542LQ2121 NSC [National Semiconductor], LMX2542LQ2121 Datasheet - Page 7

• Manufacturer Part Number: LMX2542LQ2121
• Description: PLLatinum Cellular and GPS Frequency Synthesizer System with Integrated VCO
• Manufacturer: NSC [National Semiconductor]

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