Features: Small Size5.0 mm X 5.0 mm X 0.75 mm 28-Pin LLP Package
RF Synthesizer SystemIntegrated RF VCOIntegrated Loop FilterLow Spurious, Low Phase Noise Fractional-N RF PLLBased on 11-Bit Delta Sigma Modulator10 kHz Frequency Resolution
IF Synthesizer SystemInteger-N IF PLLProgrammable Charge Pump Current LevelsProgrammable Frequency
Supports Various Reference Frequencies19.20/19.68 MHz
Fast Lock Time: 500 µs
Low Current Consumption17 mA at 2.8 V
2.7 V to 3.3 V Operation
Digital Filtered Lock Detect Output
Hardware and Software Power Down Control
Application Korean PCS CDMA Systems
Korean Cellular CDMA SystemsPinout
Specifications
| VCO Freq Range |
954-980, 1052-1078MHz |
| PLL Type |
PLL + VCO |
| Wireless Standard |
CDMA |
| LVCMOS Outputs |
1 |
| Integrated Loop Filter |
Yes |
| RF PLL |
Sigma-Delta |
| IF PLL |
Integer |
| Phase Noise |
-139 dBc/Hz |
| Frequency Offset |
at 900kHz |
| Supply Current |
17 mA |
| Supply Min |
2.7 Volt |
| Supply Max |
3.3 Volt |
| Temperature Min |
-30 deg C |
| Temperature Max |
85 deg C |
| View Using Catalog |
|
Parameter |
Symbol |
Ratings |
Units |
|
Supply Voltage |
VCC,VDD |
-0.3 to 3.6 |
V |
|
Voltage on any pin
to GND |
VI |
-0.3toVCC+0.3 |
V |
|
-0.3toVDD+0.3 |
V |
|
Storage Temperature
Range |
TSTG |
-65 to 150 |
|
DescriptionLMX2502 and LMX2512 are highly integrated, high performance, low power frequency synthesizer systems optimized for Korean PCS and Korean Cellular CDMA (1xRTT, IS-95) mobile handsets. Using a proprietary digital phase locked loop technique, LMX2502 and LMX2512 generate very stable, low noise local oscillator signals for up and down conversion in wireless communications devices.
LMX2502 and LMX2512 include a voltage controlled oscillator (VCO), a loop filter, and a fractional-N RF PLL based on a delta sigma modulator. In concert these blocks form a closed loop RF synthesizer system. LMX2502 supports the Korean PCS band and LMX2512 supports the Korean Cellular band.
LMX2502 and LMX2512 include an Integer-N IF PLL also. For more flexible loop filter designs, the IF PLL includes a 4-level programmable charge pump. Together with an external VCO and loop filter, LMX2502 and LMX2512 make a complete closed loop IF synthesizer system.
Serial data is transferred to the device via a three-wire MICROWIRE interface (DATA, LE, CLK).
Operating supply voltage ranges from 2.7 V to 3.3 V. LMX2502 and LMX2512 feature low current consumption: 17 mA at 2.8 V.
LMX2502 and LMX2512 are available in a 28-pin leadless leadframe package (LLP).
Reliability Metrics
| Part Number |
Process |
EFR Reject |
EFR Sample Size |
PPM |
LTA Rejects |
LTA Device Hours |
FITS |
MTTF (Hours) |
| LMX2512LQ0967 |
RFCMOS |
0 |
2055 |
0 |
0 |
370000 |
10 |
104988510 |
| LMX2512LQ1065 |
RFCMOS |
0 |
2055 |
0 |
0 |
370000 |
10 |
104988510 |
| LMX2512LQX0967 |
RFCMOS |
0 |
2055 |
0 |
0 |
370000 |
10 |
104988510 |
| LMX2512LQX1065 |
RFCMOS |
0 |
2055 |
0 |
0 |
370000 |
10 |
104988510 |
Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.For more information on Reliability Metrics, please click here.
Design Tools
| Title |
Size in Kbytes |
Date |
|
|
|
| LMX2512LQ0967 Evaluation Board Instructions |
577 Kbytes |
28-Jul-2003 |
View Online |
Download |
|
| LMX2512LQ1065 Evaluation Board Instructions |
565 Kbytes |
28-Jul-2003 |
View Online |
Download |
|
If you have trouble printing or viewing PDF file(s), see Printing Problems.
|
LMX2502 and LMX2512 are highly integrated, high perfor-mance, low power frequency synthesizer systems optimizedfor Korean PCS and Korean Cellular CDMA (1xRTT, IS-95)mobile handsets. Using a proprietary digital phase lockedloop technique, LMX2502 and LMX2512 generate verystable, low noise local oscillator signals for up and downconversion in wireless communications devices.LMX2502 and LMX2512 include a voltage controlled oscil-lator (VCO), a loop filter, and a fractional-N RF PLL based ona delta sigma modulator. In concert these blocks form aclosed loop RF synthesizer system. LMX2502 supports theKorean PCS band and LMX2512 supports the Korean Cel-lular band.
LMX2502 and LMX2512 include an Integer-N IF PLL also.For more flexible loop filter designs, the IF PLL includes a4-level programmable charge pump. Together with an exter-nal VCO and loop filter, LMX2502 and LMX2512 make acomplete closed loop IF synthesizer system.Serial data is transferred to the device via a three-wireMICROWIRE interface (DATA, LE, CLK).
Operating supply voltage ranges from 2.7 V to 3.3 V.LMX2502 and LMX2512 feature low current consumption:17 mA at 2.8 V.LMX2502 and LMX2512 are available in a 28-pin leadlessleadframe package (LLP).
LMX2512 Data Sheet
