Product details
Product Overview
The RFS-P2594 is a low-noise, low-jitter, wideband fractional-N RF frequency synthesizer with an integrated VCO covering 3.4–6.8 GHz. A built-in frequency doubler delivers 6.8–13.6 GHz output (RFOUTBP/BN), while the divider path provides 53.125 MHz–6.8 GHz output (RFOUTAP/AN). With a 25-bit + 14-bit cascaded SDM (equivalent to 39 bits), it achieves zero-frequency-error output, and the wander-spur optimization function keeps the output virtually free of wander spurs.
The device integrates an on-chip loop filter (selectable when the reference exceeds 50 MHz) and also supports an external loop filter mode, provides phase synchronization and phase adjustment functions, and includes an internal low-noise LDO — no external LDO is required on the PCB to achieve 70 fs RMS jitter. Control is via 4-wire SPI in a compact 6 × 6 mm QFN40 package, powered from a single 3.3 V supply.
Key Features
Reference input: 10 MHz – 400 MHz
Output: 53 MHz – 6.8 GHz (AP/AN) and 6.8 – 13.6 GHz (BP/BN via doubler)
RMS jitter: 50 fs (integer mode) / 70 fs (fractional mode), 1 kHz – 10 MHz
Normalized in-band FoM: –236 dBc/Hz (integer) / –233 dBc/Hz (fractional)
39-bit equivalent SDM resolution, zero-frequency-error output, wander-spur optimization
Integrated loop filter, low-noise LDO and temperature compensation
Fast lock: <40 µs (auto), <10 µs (manual)
Phase synchronization and phase adjustment support
Single 3.3 V supply, 4-wire SPI, 6 × 6 mm QFN40
Product Information
| Model | RFS-P2594 |
| Product Category | MMIC Products |
| Function | Fractional-N wideband RF frequency synthesizer (PLL with integrated VCO) |
| Reference Input Frequency | 10 MHz – 400 MHz |
| Output Frequency | RFOUTAP/AN: 53 MHz – 6.8 GHz; RFOUTBP/BN: 6.8 – 13.6 GHz (VCO × 2) |
| VCO Range | 3.4 – 6.8 GHz (four sub-VCOs) |
| RMS Jitter (1 kHz – 10 MHz) | 50 fs (integer mode) / 70 fs (fractional mode) |
| Normalized In-band FoM | –236 dBc/Hz (integer) / –233 dBc/Hz (fractional) |
| Normalized 1/f Noise | –127.5 dBc/Hz |
| Max PFD Frequency | 300 MHz (integer) / 250 MHz (fractional) |
| Integer-Boundary / In-Band Fractional Spur | –50 to –65 dB |
| Lock Time | <40 µs (automatic) / <10 µs (manual) |
| Output Power / Current | 2.5 dBm @ 12.8 GHz (302 mA); 6.5 dBm @ 5.4 GHz (198 mA) |
| Supply Voltage | 3.3 V (single supply, internal low-noise LDO) |
| Control Interface | 4-wire SPI (up to 50 MHz) |
| ESD Rating | ±4000 V HBM / ±750 V CDM |
| Operating Temperature | –40 to +85 °C (industrial grade) |
| Package | 6 × 6 mm QFN40 |
| Applications | 5G and millimeter-wave communications, high-speed ADC/DAC clocking, instruments and measurement |
Specifications subject to change without prior notice. Contact RFsatellite for the latest data and project-based configuration.
