Texas Instruments LMX2572 6.4GHz Low-Power Wideband RF Synthesizers
Texas Instruments LMX2572 6.4GHz Low-Power Wideband RF Synthesizers deliver high performance with frequencies generated from 12.5MHz to 6.4GHz free of an internal doubler. The PLL offers impressive performance with low-power consumption, consuming a small 75mA from a single 3.3V supply. FSK modulation is supported through the LMX2572 for wireless applications, including digital mobile radio and microphones. Through programming or pins, direct digital FSK modulation can be attained. Applications needing a deterministic delay between input and output are enabled, while the LMX2572 allows designers to synchronize the output of multiple devices.
Other excellent features include an adjustable phase with fine granularity for delay mismatches and a ramp generation or manual option delivering maximum flexibility. The Texas Instruments LMX2572 supports a fast calibration algorithm accommodating changing frequencies faster than 20µs. The generating or repeating SYSREF (compliant with JESD204B standard) initiates the LMX2572 as an optimal low-power, low-noise clock source for clocking high-speed data converters. Provided in this configuration is a fine delay adjustment to account for delay differences of board traces. The need for onboard low-noise LDOs is eliminated through the integration of the LMX2572 and LDOs from a single 3.3V supply.
Features
- 12.5MHz to 6.4GHz output frequency
- 75mA at 3.3V supply low power consumption
- –106dBc/Hz phase noise at 100kHz offset with 6.4GHz carrier
- –232dBc/Hz PLL Figure of Merit
- –123.5dBc/Hz PLL normalized 1/f noise
- 32-bit fractional-N divider
- Remove integer boundary spurs with a programmable input multiplier
- Synchronization of output phase across multiple devices
- Support for JESD204B SYSREF with programmable delay
- Support for ramp and chirp functions
- Support for FSK direct digital modulation
- Two programmable output power level differential outputs
- < 20µs fast VCO calibration speed
- Single 3V to 3.5V power supply
Applications
- Test and measurement equipment
- Digital 2-way radios
- Low-power radio communication systems
- Satellite communication
- Wireless microphones
- Propriety wireless connectivity
- MIMO
- RADAR
- High-speed data converter clocking
Block Diagram
Related Development Tool
Texas Instruments LMX2572EVM RF Synthesizer Evaluation Module
A platform for evaluating the performance of the LMX2572 wideband synthesizer.