6.4-GHz low-power wideband RF synthesizer
Product details
Parameters
Package | Pins | Size
Features
- Output frequency: 12.5 MHz to 6.4 GHz
- Low power consumption: 75 mA at 3.3-V supply
- –106-dBc/Hz Phase noise at 100-kHz offset with 6.4-GHz carrier
- PLL figure of merit: –232 dBc/Hz
- PLL normalized 1/f noise: –123.5 dBc/Hz
- 32-Bit Fractional-N divider
- Remove integer boundary spurs with 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
- Fast VCO calibration speed: < 20 µs
- Single 3-V to 3.5-V power supply
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Description
The LMX2572 is a low-power, high-performance wideband synthesizer that can generate any frequency from 12.5 MHz to 6.4 GHz without using an internal doubler. The PLL delivers excellent performance while consuming just 75 mA from a single 3.3-V supply.
For applications like digital mobile radio (DMR) and wireless microphones, the LMX2572 supports FSK modulation. Discrete level FSK and pulse-shaping FSK are supported. Direct digital FSK modulation is achievable through programming or pins.
The LMX2572 allows users to synchronize the output of multiple devices and also enables applications that need deterministic delay between input and output. The LMX2572 provides an option to adjust the phase with fine granularity to account for delay mismatch on the board or within devices. A frequency ramp generator can synthesize up to two segments of ramp in an automatic ramp generation option or a manual option for maximum flexibility. The fast calibration algorithm allows the user to change frequencies faster than 20 µs. The LMX2572 also supports generating or repeating SYSREF (compliant to JESD204B standard) making it an ideal low-power, low-noise clock source for clocking high-speed data converters. Fine delay adjustment is provided in this configuration to account for delay differences of board traces.
The LMX2572 integrates LDOs from a single 3.3-V supply, thus eliminating the need for onboard low-noise LDOs.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LMX2572 6.4-GHz Low power wideband RF synthesizer with phase synchronization and JESD204B support datasheet (Rev. B) | Jan. 29, 2019 |
User guide | LMX2572EVM Evaluation Instructions (Rev. B) | Jul. 19, 2019 | |
Application note | Achieving Low Frequency Switchover Time for Wireless Infrastructure Applications | Nov. 28, 2018 | |
Application note | LMX2571 Using a Programmable Input Multiplier to Minimize Integer Boundary Spurs | Jan. 12, 2016 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Features
- 13-MHz to 6.4-GHz Output Frequency
- -106 dBc/Hz Phase Noise at 100 kHz Offset with 6.4 GHz Carrier
- 75 mA operation current with one direct VCO output
- Two differential outputs with programmable output power
- This EVM has the complete circuit for the synthesizer, optimized and tested for performance, and (...)
Software development
Features
- Part selection based on current, cost, phase noise and package
- Filter design up for passive and active filters up to 4th-order
- Simulation of phase noise including PLL, fractional engine, voltage-controlled oscillator (VCO), input, dividers, and loop filter
- Simulation of spurs including phase detector (...)
Features
- Program EVMs through the USB2ANY Interface Adaptor or onboard USB interface.
- Export programming configurations for use in end application.
Design tools & simulation
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VQFN (RHA) | 40 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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