Features: Small Size Small 5.0 mm x 5.0 mm x 0.75 mm 28-Pin LLP Package
RF/GPS Synthesizer System
Integrated RF VCO
Integrated GPS VCO
Integrated Loop Filter
Low Spurious, Low Phase Noise Fractional-N RF PLL
Based on 11-bit Delta Sigma Modulator
10 kHz Frequency Resolution
IF Synthesizer System I nteger-N IF PLL Programmable Charge Pump Current Levels Programmable Frequencies
Supports Various Reference Oscillator Frequencies 19.20/19.68 MHz
Fast Lock Time: 500 µs
Low Current Consumption 17 mA at 2.8 V
2.7 V to 3.3 V Operation
Digital Filtered Lock Detect Output
Hardware and Software Power Down ControlApplication Korean PCS CDMA Systems with GPS
Korean Cellular CDMA Systems with GPSPinout
Specifications
| VCO Freq Range |
1355, 1619-1650MHz |
| PLL Type |
PLL + VCO |
| Wireless Standard |
PCS+GPS |
| LVCMOS Outputs |
2 |
| Integrated Loop Filter |
Yes |
| RF PLL |
Sigma-Delta |
| IF PLL |
Integer |
| Phase Noise |
-138 dBc/Hz |
| Frequency Offset |
at 1.25MHz |
| 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. 3 to VDD+0.3 |
V |
| -0. 3 to VCC+0.3 |
Storage Temperature
Range |
TSTG |
-65 to 150 |
°C |
DescriptionLMX2522 and LMX2532 are highly integrated, high performance, low power frequency synthesizer systems optimized for Korean PCS (K-PCS) with GPS and Korean Cellular (K-Cellular) with GPS, CDMA (1xRTT, IS-95) mobile handsets. Using a proprietary digital phase locked loop technique, LMX2522 and LMX2532 generate very stable, low noise local oscillator signals for up and down conversion in wireless communications devices.
LMX2522 and LMX2532 include a RF voltage controlled oscillator (VCO), a GPS 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 and GPS synthesizer system. LMX2522 supports the Korean PCS band with GPS and LMX2532 supports the Korean Cellular band with GPS.
LMX2522 and LMX2532 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, LMX2522 and LMX2532 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.
LMX2522 and LMX2532 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) |
| LMX2522LQ1635 |
RFCMOS |
0 |
2055 |
0 |
0 |
370000 |
10 |
104988510 |
| LMX2522LQX1635 |
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 |
|
|
|
| LMX2522 Evaluation Board Instructions |
655 Kbytes |
28-Jul-2003 |
View Online |
Download |
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LMX2522 Data Sheet
