SiT6712EB Evaluation Board User Manual
Contents
1 Introduction .............................................................................................................................................1
2 I/O Descriptions .......................................................................................................................................2
3 EVB Usage Descriptions ...........................................................................................................................2
3.1 EVB Configurations........................................................................................................................2
3.1.1 LVPECL, Standard Termination, Active Probe ..................................................................3
3.1.2 LVPECL, AC-coupling Configuration, Direct to Instrument...............................................3
3.1.3 LVPECL, Y-Termination, Active Probe...............................................................................4
3.1.4 LVDS, Standard Termination, Active Probe......................................................................5
3.1.5 LVDS, AC-coupling Configuration, Direct to Instrument ..................................................5
3.1.6 HCSL, Standard Termination, Active Probe......................................................................6
3.1.7 HCSL, Standard Termination, Direct to Instrument .........................................................6
3.2 I2C and SPI Interfaces ....................................................................................................................7
3.3 Waveform Measurement Using Active Probe ..............................................................................7
3.4 Jitter Measurement ......................................................................................................................8
Appendix A –Schematic, BOM and Layout of SiT6712EB.............................................................................9
1Introduction
The SiT6712EB evaluation board (EVB) is designed for use with SiTime’s In-system programmable
oscillators (ISP-DCXO) that support the differential signaling outputs in the 5.0x3.2 mm 10-pin QFN
package. It enables the user to evaluate all aspects of the ISP-DCXO devices including signal integrity,
phase noise, phase jitter and the re-programming of the output frequency via I2C/SPI interfaces.
EVB Features
-Support for SiT3521 (1 to 340 MHz) and SiT3522 (340.000001 to 725 MHz) ISP-DCXOs
-Probing points for output frequency measurements
oSupport for LVPECL, LVDS and HCSL output signal types
oSupport for waveform measurements
oSupport for phase noise and phase jitter measurements
-Connector access to I2C and/or SPI interfaces
-Connector access for current consumption measurements
SiTime typically ships the EVB pre-configured with the ISP-DCXO device specified by the user. The end
user can re-configure the EVB for an ISP-DCXO device of a different configuration.
