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Fractional-N Frequency Synthesizer
- Overview
- Documentation and Technical Information
- Tools and Evaluation Boards
- Use Case
| Part Number | Description | RF Bandwidth Hz | PFD（max）Hz | FOM-Normalized inband PN Int-n（typ）（Dbc/Hz） | Voltage V | Operature Temperature ℃ | Package | Application |
|---|---|---|---|---|---|---|---|---|
| RF4158 | Fractional-N Frequency Synthesizer | 800M~8G | 100MHz | -203.9dBc/Hz | 2.7~ 3.45 | -40~125 | QFN 24PIN | FMCW Radar |
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RF4158
The RF4158 is a 8.0 GHz, fractional-N frequency synthesizer with modulation and waveform generation capability. It consists of a low noise digital phase frequency detector (PFD), a precision charge pump, and a programmable reference divider. There is a sigma-delta (Σ-Δ) based fractional interpolator to allow programmable fractional-N division.
The RF4158 can be used to implement frequency shift keying (FSK) and phase shift keying (PSK) modulation.
Control of all on-chip registers is via a simple 3-wire interface. The device operates with a power supply ranging from 2.7 V to 3.3 V and can be powered down when not in use.
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Application
FMCW Radar
Features and Benefits
RF bandwidth up to 8.0 GHz
Power-down mode
implement frequency shift keying (FSK) and phase shift keying (PSK) modulation.
Ramp with 2 different sweep rates
2.7 V to 3.3 V power supply
Programmable charge pump currents
3-wire serial interface
Switched bandwidth fast-lock mode
ESD performance: 2KV HBM、1KV CDM
Block Diagram Funtion
Application
◆ Auto
◆ 24G mmWave Transceivers
◆ Block Diagram
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◆ application case
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