SI53108-EVB Datasheet, PDF (5/7 Pages) Silicon Laboratories – DC pin controls per data sheet specification

Si53108-EVB
2. Input and Power Supply Sequencing
The Si53108-A01AGM should be powered up with supply at both the VDD and VDD_IO nodes (at the jumpers
available on the EVB). A 100MHz or 133MHz HCSL input clock should be applied to pins 8 and 9. There is no
internal or on-board resistive termination, therefore HCSL termination needs to be provided at the input if needed
by the driver. The input clock should be applied only after the supplies are stable.
3. Quick Start Guide:
1. Enable supply on the VDD pin.
2. Enable supply on the VDDIO pin.
3. Apply input clock on the SMA connectors CLK_IN/CLK_IN# and measure the return path clock on
CLK_IN_RET, CLK_IN#_RET.
Figure 4. Clock Return Path
a. The input clock measured at J32, J33 needs a 50-ohm termination on the scope.
b. The attenuation will be 1:10 after the above termination. Appropriate scaling (10x) needs to be set at the
scope to adjust for the scaling.
4. The output clocks are now set up and can be measured on an oscilloscope or frequency domain measurement
instrument.
4. Usage of the EVB
1. Once the EVB has been set up, the following can be evaluated:
2. Signal integrity of the device when driving 10-inch, 100-ohm differential traces.
3. Effect of capacitance load on output signal integrity.
4. Output-to-output skew over 10-inch traces.
5. Input-to-output prorogation delay in BYPASS, HBW, and LBW modes using the input clock return path.
6. Measuring the power consumption of the device.
7. Modification of the device settings via the I²C interface.
Rev. 0.1
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