LMX2531 Texas instruments

LMX2531

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LMX2531

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Описание

The LMX2531 is a low-power, high-performance frequency synthesizer system which includes a fully integrated delta-sigma PLL and VCO with fully integrated tank circuit. The third and fourth poles are also integrated and adjustable. Ultra-low noise and high-precision LDOs are integrated for the PLL and VCO, which yield higher supply-noise immunity and more consistent performance. When combined with a high-quality reference oscillator, the LMX2531 device generates very stable, low-noise local-oscillator signals for up and down conversion in wireless communication devices. The LMX2531 device is a monolithic integrated circuit, fabricated in an advanced BiCMOS process. Several different versions of this product accommodate different frequency bands.

Multiple Frequency Options Available
- See Device Information Table
- Frequencies From: 553 MHz to 3132 MHz
PLL Features
- Fractional-N Delta-Sigma Modulator Order
  Programmable up to Fourth Order
- FastLock/Cycle Slip Reduction with Timeout
  Counter
- Partially Integrated, Adjustable Loop Filter
- Very Low Phase Noise and Spurs
VCO Features
- Integrated Tank Inductor
- Low Phase Noise
Other Features
- 2.8-V to 3.2-V Operation
- Low Operating Current
- Low Power-Down Current
- 1.8-V MICROWIRE Support
- 36-Pin 6-mm × 6-mm × 0.8-mm WQFN Package

Integrated VCO	Yes
Output frequency (min) (MHz)	553
Output frequency (max) (MHz)	3132
Normalized PLL phase noise (dBc/Hz)	-212
Current consumption (mA)	34
Features	Integrated VCO
1/f noise (10-kHz offset at 1-GHz carrier) (dBc/Hz)	-104
Rating	Catalog
Operating temperature range (°C)	-40 to 85
Lock time (µs) (typ)	300