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PDF LMX2347 Data sheet ( Hoja de datos )
| Número de pieza | LMX2347 | |
| Descripción | PLLatinum Frequency Synthesizer for RF Personal Communications | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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November 2002
LMX2346/LMX2347
PLLatinum™ Frequency Synthesizer for RF Personal
Communications
LMX2346 2.0 GHz
LMX2347 2.5 GHz
General Description
The LMX2346/7 are high performance frequency synthesiz-
ers with an integrated 32/33 dual modulus prescaler. The
LMX2346 is designed for RF operation up to 2.0 GHz. The
LMX2347 is designed for RF operation up to 2.5 GHz. Using
a proprietary digital phase locked loop technique, the
LMX2346/7 generates very stable, low noise control signals
for UHF and VHF voltage controlled oscillators.
Serial data is transferred into the LMX2346/7 via a three-line
MICROWIRE interface (DATA, LE, CLOCK). Supply voltage
range is from 2.7V to 5.5V. The charge pump provides 4 mA
output current.
The LMX2346/7 are manufactured using National’s 0.5µ
ABiC V silicon BiCMOS process and is available in 16-pin
TSSOP and 16-pin CSP packages.
Features
n RF operation up to 2.5 GHz
n 2.7V to 5.5V operation
n Digital & Analog Lock Detect
n 32/33 Dual modulus prescaler
n Excellent Phase Noise
n Internal balanced, low leakage charge pump
n Pin Compatible to LMX2323
Applications
n Cellular DCS/PCS/3G infrastructure equipment
n Wireless Local Area Networks (WLANs)
n Other wireless communication systems
Functional Block Diagram
PLLatinum™ is a trademark of National Semiconductor Corporation.
© 2002 National Semiconductor Corporation DS200384
20038406
www.national.com
1 page  
Absolute Maximum Ratings (Notes 1,
2)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Power Supply Voltage,
(VCC)
Power Supply for Charge
Pump, (VP)
Voltage on any pin with
GND=0V, (Vi)
Storage Temperature
Range, (TS)
−0.3V to +6.5V
−0.3V to +6.5V
−0.3V to VCC +0.3V
−65˚C to +150˚C
Lead Temp. (solder 4 sec.),
(TL)
+260˚C
Recommended Operating
Conditions (Note 1)
Power Supply Voltage, (VCC)
Power Supply for Charge Pump, (VP)
( VP must be equal to VCC)
Operating Temperature, (TA)
Min Max Unit
2.7 5.5 V
2.7 5.5 V
−40 +85 ˚C
Electrical Characteristics
The following conditions apply; VCC = VP = 3.0V; −40˚C ≤ TA ≤ 85˚C, unless specified differently.
Symbol
Parameter
Conditions
Min
ICC
ICC Power Supply Current, LMX2346
VCC = 5.5V
Power Supply Current, LMX2347
ICC-pwdn Power Down Current
VCC = 5.5V
CLOCK, DATA, LE = GND
CE = GND
RF PRESCALER
FIN Operating Frequency, RF
Prescaler, LMX2346
0.2
Operating Frequency, RF
Prescaler, LMX2347
0.2
PFIN
Input Sensitivity, RF Prescaler
PHASE DETECTOR
2.7V ≤ VCC ≤ 3.0V (Note 6)
3.0V < VCC ≤ 5.5V (Note 6)
−15
−10
Fφ Phase Detector Frequency
REFERENCE OSCILLATOR
FOSC
Operating Frequency, Reference (Note 10)
Oscillator Input
5
VOSC
Input Sensitivity, Reference
Oscillator Input
(Note 7)
0.4
IIH OSCin High-Level Input Current
IIL OSCin Low-Level Input Current
CHARGE PUMP
VIH = VCC = 5.5V
VIL = 0V, VCC = 5.5V
−100
ICPo-source
ICPo-sink
ICPo-tri
ICPo-sink
vs.
ICPo-source
ICPo vs
VCPo
ICPo vs TA
Charge Pump Source Current
Charge Pump Sink Current
Charge Pump TRI-STATE Current
CP Sink vs. Source Mismatch
CP Current vs. Voltage
CP Current vs. Temperature
VCPo = Vp/2V
VCPo = Vp/2V
0.5V ≤ VCPo ≤ VP − 0.5V
VCPo = Vp/2
TA = 25˚
(Note 4)
0.5V ≤ VCPo ≤ VP − 0.5V
TA = 25˚ (Note 4)
VCPo = Vp/2V (Note 4)
−2.5
Typ
3.5
4.5
1
−4.0
4.0
3
10
10
Max
4.5
7.0
5.5
8.0
10
Units
mA
mA
mA
mA
µA
2.0 GHz
2.5 GHz
+0 dBm
+0 dBm
10 MHz
104 MHz
VCC − 0.3
100
VPP
µA
µA
mA
mA
2.5 nA
10 %
15 %
%
5 www.national.com
5 Page 
Typical Performance Characteristics (Continued)
LMX2347 FIN Sensitivity vs Frequency at 5.5V
LMX2346/7 OSCIN Sensitivity vs Frequency at 3.0V
20038430
20038431
11 www.national.com
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet LMX2347.PDF ] | |
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| LMX2347 | LMX2346/LMX2347 Freq Synth for RF Pers Comm LMX2346 2.0GHzLMX2347 2.5GHz (Rev. F) | Texas Instruments |
| LMX2347 | PLLatinum Frequency Synthesizer for RF Personal Communications | National Semiconductor |
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