AD9542
RECOMMENDED FOR NEW DESIGNSDual DPLL, Quad Input, 10 Output, Multiservice Line Card Clock Translator and Jitter Cleaner
- Part Models
- 2
- 1ku List Price
- Starting From $9.61
Part Details
- Dual DPLL synchronizes 2 kHz to 750 MHz physical layer clocks providing frequency translation with jitter cleaning of noisy references
- Complies with ITU-T G.8262 and Telcordia GR-253
- Supports Telcordia GR-1244, ITU-T G.812, G.813, G.823, G.824, and G.825
- Continuous frequency monitoring and reference validation for frequency deviation as low as 50 ppb
- Both DPLLs feature a 24-bit fractional divider with 24-bit programmable modulus
- Programmable digital loop filter bandwidth: 10−4 Hz to 1850 Hz
- Automatic and manual holdover and reference switchover, providing zero delay, hitless, or phase buildout operation
- Programmable priority-based reference switching with manual, automatic revertive, and automatic nonrevertive modes supported
- 5 pairs of clock output pins with each pair useable as differential LVDS/HCSL/CML or as 2 single-ended outputs (1 Hz to 500 MHz)
- 2 differential or 4 single-ended input references
- Crosspoint mux interconnects reference inputs to PLLs
- Supports embedded (modulated) input/output clock signals
- Fast DPLL locking modes
- Provides internal capability to combine the low phase noise of a crystal resonator or crystal oscillator with the frequency stability and accuracy of a TCXO or OCXO
- External EEPROM support for autonomous initialization
- Single 1.8 V power supply operation with internal regulation
- Built in temperature monitor/alarm and temperature compensation for enhanced zero delay performance
The 10 clock outputs of the AD9542 are synchronized to any one of up to four input references. The digital phase-locked loops (DPLLs) reduce timing jitter associated with the external references. The digitally controlled loop and holdover circuitry continuously generate a low jitter output signal, even when all reference inputs fail.
The AD9542 is available in a 48-lead LFCSP (7 mm × 7 mm) package and operates over the −40°C to +85°C temperature range.
Note that throughout this data sheet, multifunction pins, such as SDO/M5, are referred to either by the entire pin name or by a single function of the pin, for example, M5, when only that function is relevant.
Applications
- SyncE jitter cleanup and synchronization
- Optical transport networks (OTN), SDH, and macro and small cell base stations
- OTN mapping/demapping with jitter cleaning
- Small base station clocking, including baseband and radio
- Stratum 2, Stratum 3e, and Stratum 3 holdover, jitter cleanup, and phase transient control
- JESD204B support for analog-to-digital converter (ADC) and digital-to-analog converter (DAC) clocking
- Cable infrastructures
- Carrier Ethernet
Documentation
Data Sheet 1
User Guide 2
Application Note 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| AD9542BCPZ | 48-Lead LFCSP (7mm x 7mm x 0.75mm w/ EP) | ||
| AD9542BCPZ-REEL7 | 48-Lead LFCSP (7mm x 7mm x 0.75mm w/ EP) |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Oct 3, 2022 - 22_0207 AD9542 Data Sheet Specification Revision |
||
| AD9542BCPZ | PRODUCTION | |
| AD9542BCPZ-REEL7 | PRODUCTION | |
|
Dec 13, 2018 - 18_0199 AD9542 Data Sheet Specification Changes |
||
| AD9542BCPZ | PRODUCTION | |
| AD9542BCPZ-REEL7 | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Tools & Simulations
IBIS Model 1
Evaluation Kits
AD9542 Evaluation Board
Resources
Software
Software-Defined Radio