500MHz to 14GHz Wideband, Low Noise Fractional N PLL With Ramp/Chirp Generation
Product details
Parameters
Package | Pins | Size
Features
- –227 dBc/Hz Normalized PLL Noise
- 500 MHz – 14 GHz Wideband PLL
- 3.15 – 5.25 V Charge Pump PLL Supply
- Versatile Ramp / Chirp Generation
- 200 MHz Max Phase Detector Frequency
- FSK / PSK Modulation Pin
- Digital Lock Detect
- Single 3.3 V Supply Capability
- Automotive 125°C Q100 Grade 1 Qualification
- Non-Automotive (LMX2492) Option
Description
The LMX2492/92-Q1 is a low noise 14 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 LMX2492/92-Q1 supports a broad and flexible class of ramping capabilities, including FSK, PSK, and configurable piecewise linear FM modulation profiles of up to 8 segments. It supports fine PLL resolution and fast ramp with up to a 200 MHz phase detector rate. The LMX2492/92-Q1 allows any of its registers to be read back. The LMX2492/92-Q1 can operate with a single 3.3 V supply. Moreover, supporting up to 5.25 V charge pump can eliminate the need of external amplifier, leading to a simpler solution with improved phase noise performance.
Technical documentation
| Type | Title | Date | |
|---|---|---|---|
| * | Datasheet | LMX2492/LMX2492-Q1 14 GHz Low Noise Fractional N PLL with Ramp/Chirp Generation datasheet (Rev. B) | May 28, 2015 |
| User guides | LMX2492EVM Instructions User's Guide (Rev. E) | May 05, 2017 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The LMX2492EVM supports evaluation of the LMX2492 and LMX2492-Q1 which is an ultra-low noise 14 GHz wideband RF PLL with ramp/chirp generation, consisting of a delta-sigma fractional N PLL, phase detector, programmable 5V charge pump and high frequency divider for the VCO. The LMX2492 supports a (...)
Features
- -227 dBc/Hz Normalized PLL Noise in Fractional Mode
- 500 MHz to 14 GHz Wideband PLL
- 3.15V to 5.5V Charge Pump PLL Voltage
- Integrated FMCW Ramp / Chirp Generation
- FSK / PSK Modulation
- Excellent Ramp Linearity
- 200 MHz Maximum Phase Detector Frequency
- Integrated LDO for Digital Supply
- Frequency / Phase (...)
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 |
|---|---|---|
| WQFN (RTW) | 24 | View options |
Ordering & quality
Support & training
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