LMX2491 Description
The LMX2491 device is a low-noise, 6.4-GHz wideband delta-sigma fractional N PLL with ramp and chirp generation. It consists of a phase frequency detector, programmable charge pump, and high frequency input for the external VCO. The LMX2491 supports a broad and flexible class of ramping capabilities, including FSK, PSK, and configurable piecewise linear FM modulation profiles of up to 8 segments.
LMX2491 Key Features
- 1 -227-dBc/Hz Normalized PLL Noise
- 500-MHz to 6.4-GHz Wideband PLL
- 3.15-V to 5.25-V Charge Pump PLL Supply
- Versatile Ramp / Chirp Generation
- 200-MHz Maximum Phase Detector Frequency
- FSK / PSK Modulation Pin
- Digital Lock Detect
- Single 3.3-V Supply Capability