Product details
Product Overview
The RFS41513 is a low-noise, low-jitter fractional-N wideband PLL frequency synthesizer designed to work with external VCOs up to 26 GHz (down to 1 GHz). The chip integrates a reference buffer, reference divider/multiplier, phase-frequency detector (PFD)/charge pump, feedback divider, delta-sigma modulator and lock detection. A 24-bit + 25-bit cascaded SDM structure achieves zero-frequency-error output.
It is powered from a single 3.3 V supply with an on-chip low-noise LDO, operates over –40 °C to +125 °C, and is compatible with 3-wire/4-wire SPI control. The SPI Double Buffer function saves register write time and supports fast frequency hopping (20–40 µs with CSP enabled), making it well suited for 5G and millimeter-wave communications, high-speed ADC/DAC clocking, and instrumentation.
Key Features
Reference input: 10 MHz – 400 MHz
External VCO support: 1 GHz – 26 GHz
RMS jitter: 60 fs (integer mode) / 70 fs (fractional mode), 1 kHz – 10 MHz
Normalized in-band FoM: –235 dBc/Hz (integer) / –234 dBc/Hz (fractional)
24-bit + 25-bit cascaded SDM, zero-frequency-error output
SPI Double Buffer for fast frequency hopping: 20–40 µs
Integrated low-noise LDO, single 3.3 V supply
3-wire / 4-wire SPI control (up to 50 MHz)
Wide temperature lock range: –40 to +125 °C
Compact 4 × 4 mm QFN24 package
Product Information
| Model | RFS41513 |
| Product Category | MMIC Products |
| Function | Fractional-N wideband PLL frequency synthesizer (external VCO) |
| Reference Input Frequency | 10 MHz – 400 MHz |
| External VCO Frequency | 1 GHz – 26 GHz |
| RMS Jitter (1 kHz – 10 MHz) | 60 fs (integer mode) / 70 fs (fractional mode) |
| Normalized In-band FoM | –235 dBc/Hz (integer) / –234 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 | –55 to –65 dBc |
| Frequency Hopping Time | 20 – 40 µs (CSP enabled, loop BW 800 kHz) |
| Power Consumption | 3.3 V / 130 mA @ 15 GHz (PLL core) |
| Supply Voltage | 3.3 V (single supply, internal low-noise LDO) |
| Control Interface | 3-wire / 4-wire SPI (up to 50 MHz), SPI Double Buffer support |
| ESD Rating | ±4000 V HBM / ±750 V CDM |
| Operating Temperature | –40 to +125 °C |
| Package | 4 × 4 mm QFN24 |
| Applications | 5G and millimeter-wave communications, high-speed ADC/DAC clocking, instrumentation and measurement |
Specifications subject to change without prior notice. Contact RFsatellite for the latest data and project-based configuration.
