Overview
The LMX2522LQ1635/NOPB is a highly integrated, high-performance frequency synthesizer system developed by Texas Instruments. This device is optimized for use in wireless communication systems, particularly for Korean PCS (K-PCS) with GPS and CDMA (1xRTT, IS-95) mobile handsets. It employs a proprietary digital phase locked loop technique to generate stable, low-noise local oscillator signals for up and down conversion.
Key Specifications
| Parameter | Value |
|---|---|
| Package | 28-Pin WQFN (NJB) |
| Operating Temperature Range | -30°C to 85°C |
| Supply Voltage Range | 2.7 V to 3.3 V |
| Supply Voltage (Nominal) | 2.8 V |
| Supply Current (Max) | 21 mA |
| RF VCO Frequency Range | 1619.62 MHz to 1649.62 MHz |
| Frequency Resolution | 10 kHz |
| Lock Time | 500 µs |
| Phase Noise @100 kHz offset | -113 dBc/Hz |
| Reference Spurs | -75 dBc |
Key Features
- Small size: 5.0 mm x 5.0 mm x 0.75 mm 28-Pin WQFN package
- RF/GPS Synthesizer System with integrated RF VCO, GPS VCO, and loop filter
- Low spurious, low phase noise fractional-N RF PLL based on 11-bit delta sigma modulator
- Integer-N IF PLL with programmable charge pump current levels and 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
- Digital filtered lock detect output and hardware/software power down control
- Serial data transfer via three-wire MICROWIRE interface (DATA, LE, CLK)
Applications
The LMX2522LQ1635/NOPB is designed for use in wireless communication devices, including Korean PCS (K-PCS) with GPS, Korean Cellular (K-Cellular) with GPS, and CDMA (1xRTT, IS-95) mobile handsets. It is also suitable for other applications requiring high-performance, low-power frequency synthesis.
Q & A
- What is the LMX2522LQ1635/NOPB used for? The LMX2522LQ1635/NOPB is used as a frequency synthesizer system in wireless communication devices.
- Who manufactures the LMX2522LQ1635/NOPB? The LMX2522LQ1635/NOPB is manufactured by Texas Instruments.
- What is the package type of the LMX2522LQ1635/NOPB? The package type is a 28-Pin WQFN (NJB).
- What is the operating temperature range of the LMX2522LQ1635/NOPB? The operating temperature range is -30°C to 85°C.
- What is the supply voltage range of the LMX2522LQ1635/NOPB? The supply voltage range is 2.7 V to 3.3 V.
- What is the frequency resolution of the LMX2522LQ1635/NOPB? The frequency resolution is 10 kHz.
- How long does it take for the LMX2522LQ1635/NOPB to lock? The lock time is 500 µs.
- What is the phase noise performance of the LMX2522LQ1635/NOPB? The phase noise at 100 kHz offset is -113 dBc/Hz.
- Does the LMX2522LQ1635/NOPB support power down modes? Yes, it supports hardware and software power down control.
- How is serial data transferred to the LMX2522LQ1635/NOPB? Serial data is transferred via a three-wire MICROWIRE interface (DATA, LE, CLK).
