Packaging information
| Package | Pins WQFN (NJB) | 28 |
| Operating temperature range (°C) -30 to 85 |
| Package qty | Carrier 1,000 | SMALL T&R |
Features for the LMX2502
- Small
Size
- 5.0 mm X 5.0 mm X 0.75 mm 28-Pin WQFN Package
- RF Synthesizer
System
- Integrated RF 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
- Integer-N IF PLL
- Programmable Charge Pump Current Levels
- Programmable Frequency
- Supports Various Reference
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 Control
All trademarks are the property of their respective owners.
Description for the LMX2502
LMX2502 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 WQFN package.