Overview
The AD9558BCPZ, produced by Analog Devices Inc., is a low loop bandwidth clock multiplier designed to provide jitter cleanup and synchronization for various systems, including synchronous optical networks (OTN/SONET/SDH). This device operates over an industrial temperature range of −40°C to +85°C and is housed in a 9 mm × 9 mm LFCSP package. The AD9558 generates an output clock synchronized to up to four external input references using a digital phase-locked loop (PLL), which reduces input time jitter or phase noise associated with the external references. It also features holdover circuitry that continuously generates a low jitter output clock even when all reference inputs have failed.
Key Specifications
| Parameter | Min | Typ | Max | Unit | Test Conditions/Comments |
|---|---|---|---|---|---|
| Supply Voltage | 3.0 | - | 3.6 | V | - |
| Supply Current | - | 420 | 550 | mA | - |
| Power Dissipation | - | 1.26 | 1.98 | W | - |
| Reference Input Frequency Range (Differential) | 10 | - | 750 | MHz | LVPECL, LVDS |
| Reference Input Frequency Range (Single-Ended) | 0.002 | - | 300 | MHz | CMOS |
| Minimum Input Slew Rate | 40 | - | - | V/μs | - |
| Differential Input Voltage Sensitivity | 240 | - | 400 | mV | fIN < 800 MHz to fIN = 1050 to 1250 MHz |
| Number of Outputs | - | - | 6 | - | - |
Key Features
- Generates an output clock synchronized to up to four external input references using a digital PLL.
- Reduces input time jitter or phase noise associated with the external references.
- Holdover circuitry ensures continuous low jitter output clock even when all reference inputs have failed.
- Supports various input types including LVPECL, LVDS, and CMOS.
- Operates over an industrial temperature range of −40°C to +85°C.
- Includes a serial interface (SPI or I²C) for configuration and control.
- Features EEPROM for autonomous initialization.
Applications
- Network synchronization, including synchronous Ethernet and SDH to OTN mapping/demapping.
- Cleanup of reference clock jitter.
- SONET/SDH/OTN clocks up to 100 Gbps, including FEC.
- Stratum 3 holdover, jitter cleanup, and phase transient control.
- Wireless base station controllers.
- Cable infrastructure.
- Data communications.
Q & A
- What is the primary function of the AD9558BCPZ? The AD9558BCPZ is a low loop bandwidth clock multiplier that provides jitter cleanup and synchronization for various systems.
- What is the operating temperature range of the AD9558BCPZ? The device operates over an industrial temperature range of −40°C to +85°C.
- How many external input references can the AD9558BCPZ synchronize with? The AD9558BCPZ can synchronize with up to four external input references.
- What types of input signals does the AD9558BCPZ support? The device supports LVPECL, LVDS, and CMOS input signals.
- What is the purpose of the holdover circuitry in the AD9558BCPZ? The holdover circuitry ensures continuous low jitter output clock even when all reference inputs have failed.
- What serial interfaces are available for configuration and control of the AD9558BCPZ? The device features SPI or I²C serial interfaces.
- What is the package type and size of the AD9558BCPZ? The device is housed in a 9 mm × 9 mm LFCSP package.
- What are some common applications of the AD9558BCPZ? Common applications include network synchronization, reference clock jitter cleanup, SONET/SDH/OTN clocks, and wireless base station controllers.
- Does the AD9558BCPZ support EEPROM for autonomous initialization? Yes, the device includes EEPROM for autonomous initialization.
- How many output clocks can the AD9558BCPZ generate? The AD9558BCPZ can generate up to six output clocks.
