Low Jitter Crystal Oscillator Silicon Labs 531BC156M250DG Frequency Stability and Noise Rejection
Product Overview
The Si530/531 XO is a crystal oscillator utilizing Silicon Laboratories' advanced DSPLL circuitry to deliver low jitter clock outputs at high frequencies. It offers any-rate output frequencies from 10 MHz to 945 MHz, with select frequencies extending to 1.4 GHz. Unlike traditional XOs, this IC-based solution uses a single fixed crystal for a wide range of output frequencies, ensuring exceptional frequency stability and reliability. The DSPLL clock synthesis provides superior supply noise rejection, simplifying the generation of low jitter clocks in noisy communication system environments. The Si530/531 is factory configurable for frequency, supply voltage, output format, and temperature stability, with specific configurations programmed at shipment to eliminate long lead times.
Product Attributes
- Brand: Silicon Laboratories
- Certifications: Pb-free/RoHS-compliant
Technical Specifications
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit | Notes |
| Supply Voltage | VDD | 3.3 V option | 2.97 | 3.3 | 3.63 | V | 1 |
| 2.5 V option | 2.25 | 2.5 | 2.75 | V | 1 | ||
| 1.8 V option | 1.71 | 1.8 | 1.89 | V | 1 | ||
| Any Option | -0.5 | 3.8 | V | 9 | |||
| Supply Current | IDD | Output enabled (LVPECL) | 111 | 121 | mA | ||
| Output enabled (CMOS) | 81 | 88 | mA | ||||
| Nominal Frequency | fO | LVPECL/LVDS/CML | 10 | 945 | MHz | 1, 2 | |
| CMOS | 10 | 160 | MHz | 1, 2 | |||
| Initial Accuracy | fi | Measured at +25 C at time of shipping | 1.5 | ppm | |||
| Temperature Stability | 7 | 20 | 50 | ppm | 1, 3 | ||
| Total Stability (Temp stability = 7 ppm) | 20 | ppm | |||||
| Total Stability (Temp stability = 50 ppm) | 61.5 | ppm | |||||
| Aging (Frequency drift over 20 year life) | fa | 10 | ppm | ||||
| Powerup Time | tOSC | Time from powerup or tristate mode to fO | 10 | ms | 4 | ||
| Phase Jitter (RMS) for FOUT > 500 MHz | J | 12 kHz to 20 MHz (OC-48) | 0.25 | 0.40 | ps | 1 | |
| 50 kHz to 80 MHz (OC-192) | 0.26 | 0.37 | ps | 1 | |||
| Phase Jitter (RMS) for FOUT of 125 to 500 MHz | J | 12 kHz to 20 MHz (OC-48) | 0.36 | 0.50 | ps | ||
| 50 kHz to 80 MHz (OC-192) | 0.34 | 0.42 | ps | 2 | |||
| Period Jitter (RMS) | JPER | Any output mode | 2 | ps | * | ||
| Period Jitter (Peak-to-Peak) | Any output mode, N = 1000 cycles | 14 | ps | * | |||
| Operating Temperature Range | TA | 40 | 85 | C | |||
| Storage Temperature | TS | 55 | 125 | C | 1 |
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