Silicon Laboratories SiTCXO1-EVB User manual

Brand: Silicon Laboratories

Model: SiTCXO1-EVB

Type: User manual

This manual is also suitable for

UG364

UG364: SiTCXO1-EVB Evaluation Board

User's Guide

The Silicon Labs SiTCXO1-EVB (kit) is used to help evaluate Silicon Labs Jitter Attenu-

ator and

Network Synchronization products for Stratum 3/3E, IEEE 1588 and G.8262

SyncE applications. This board is often used with the Si5348 network synchronizer

clock as the reference input. This board can come with an option of one of two Rakon

TCXOs. U1, option 1 is Rakon's E6518LF 5 mm x 7 mm part (pictured below) and U2,

option2 is Rakon's smaller RPT5032A 3.2 mm x 5 mm part.

EVB FEATURES:

• Dual Footprint capable of two TCXO sizes.

• Power supply filtering

•

Simple single ended output

silabs.com | Building a more connected world. Rev. 0.1

1. Quick Start

1. Connect power 3.3V to J1, and note that start-up current could be on the order of 7-8 mA.

2. Connect SiOCXO1-EB output, J2, to the Si5348 REF clock input using the short SMA cable provided with the EVB kit.

UG364: SiTCXO1-EVB Evaluation Board User's Guide

Quick Start

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2. Top Layer View of Board

Figure 2.1. Top Layer View of Board

UG364: SiTCXO1-EVB Evaluation Board User's Guide

Top Layer View of Board

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3. Functional Description

The SiTCXO1-EB is used in conjunction with Silicon Labs precision timing devices to facilitate characterization. The SiTCXO1-EB was

designed to maximize output termination configurations as well as optional control voltage terminations. Resistors and capacitors are

0603, which makes it simple to remove and add various values. The SiTCXO1-EB bill of materials and PCB layouts are in Section

7. Bill of Materials and Section 6. Schematic.

The SiTCXO1-EB is intended to be a general use board for a 6-pin TCXO with 5.0 mm x 3.2 mm nominal package size, such as the

Rakon P/N RPT5032A. It can also be used with the 6-pin TCXO with 5.0 mm x 7 mm nominal package size, such as the Rakon P/N

E6518LF 12.8 MHz pictured below. See 6. Schematic for example measurements carried out using this TCXO.

Figure 3.1. SiTCXO1-EB Shown Populated with a TCXO

3.1 Power Supply

The

power

supply voltage and current requirements are listed in the manufacturers data sheet. A 3.3 V ±5% supply is required. Also,

note the TCXO initial current can be on the order of 7mA. Power supply filtering has been added to the evaluation board to minimize

spurious response.

3.2 Output Termination

In most applications simple R C termination is used, as seen with R3 and C4 in Figure 6.1 SiTCXO1-EB Schematic on page 7. This

is a resistor to optimize impedance matching and a capacitor to block dc. Modifications can be made as required.

UG364: SiTCXO1-EVB Evaluation Board User's Guide

Functional Description

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4. Configuring the SiTCXO-EB

SiTCXO1-EB

Power Supply

Ref Input

Si5348-EVB

Frequency Counter

or other MTIE T

DEV

Instrument

Figure 4.1. SiTCXO1-EB Configured with Si5348 EVB

The connection between the SiTCXO-EB and Si5348 EVB should be kept as short as possible. It is recommended to use a UPS Power

Supply back-up for long term testing.

UG364: SiTCXO1-EVB Evaluation Board User's Guide

Configuring the SiTCXO-EB

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5. SiTCXO1-EB Functionality Test

1. Connect power to J1 (3.3 V).

2. Connect SiTCXO1-EB Output, J2, to an oscilloscope (terminate into 50 Ω).

3. Verify that the red LED is illuminated, the current draw matches closely to the specs, and the output matches the TCXO’s data

sheet.

UG364: SiTCXO1-EVB Evaluation Board User's Guide

SiTCXO1-EB Functionality Test

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6. Schematic

Figure 6.1. SiTCXO1-EB Schematic

UG364: SiTCXO1-EVB Evaluation Board User's Guide

Schematic

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7. Bill of Materials

Table 7.1. Bill of Materials

Qty Ref Value Rating Voltage Tol Type PCB Footprint Mfr PN Mfr

1 C1 10 µF 10 V ±10% TANT C3216 TA010TCM106KA Venkel

1 C2, C4 0.1 µF 10 V ±10% X7R C0603|C0603L C0603X7R100-104K Venkel

1 C3 100 pF 50 V ±20% C0G C0603 C0603C0G500-101M Venkel

1 C5 10 pF 50 V ±10% C0G C0603 C0603C0G500-100K Venkel

1 D1 Green 20 mA 3.4 V

SMT,

Chip

LED

LED-HSMX-C170 HSMQ-C170

Avago

Technolo-

gies

1 J1

CONN

TRBLK 2

TERM

BLK

CONN-1X2-TB 1729018

PHOENIX

CONTACT

1 J2 SMA SMA SMA-EDGE-3 142-0701-801

Johnson

Compo-

nents

1 R3 39.0 Ω 1/10 W ±1%

Thick

Film

R0603|R0603L ERJ-3EKF39R0V Panasonic

1 R4 17.4 kΩ 1/16 W ±1%

Thick

Film

R0603 CR0603-16W-1742F Venkel

1 U1 E6518LF

Stratum

3.3 TCXO OSC6N5X7-E6518LF E6518LF Rakon

Not Installed Components

2 R1, R2 1 k 1/10 W ±1%

Thick

Film

R0603 CR0603-10W-1001F Venkel

TP1,

TP2

Blue Loop TESTPOINT 151-205-RC Kobiconn

1 U2 RPT5032A TCXO

OSC6N3.2X5P0.8-

RPT5032A

RPT5032A Rakon

UG364: SiTCXO1-EVB Evaluation Board User's Guide

Bill of Materials

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8. Layout

Figure 8.1. Primary Silkscreen

Figure 8.2. Primary Solder Mask

UG364: SiTCXO1-EVB Evaluation Board User's Guide

Layout

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Figure 8.3. Primary Side

Figure 8.4. Secondary Side

UG364: SiTCXO1-EVB Evaluation Board User's Guide

Layout

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Figure 8.5. Secondary Solder Mask

Figure 8.6. Primary Solder Paste

UG364: SiTCXO1-EVB Evaluation Board User's Guide

Layout

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Silicon Labs intends to provide customers with the latest, accurate, and in-depth documentation of all peripherals and modules available for system and software implementers using or

intending to use the Silicon Labs products. Characterization data, available modules and peripherals, memory sizes and memory addresses refer to each specific device, and "Typical"

parameters provided can and do vary in different applications. Application examples described herein are for illustrative purposes only. Silicon Labs reserves the right to make changes

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