Gehäuseinformationen
| Gehäuse | Pins WQFN (NJB) | 28 |
| Betriebstemperaturbereich (°C) -30 to 85 |
| Gehäusemenge | Träger 1.000 | SMALL T&R |
Merkmale von 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
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Beschreibung von 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.