Datasheet > TB502-3X-520-XX

TB502-3X-520-XX

更新时间： 2024-12-01 03:28:59

品牌	Logo	应用领域
PLL		测试
页数	文件大小	规格书
2页	43K
描述
Test Board for chip evaluation and Layout recommendations

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数据手册

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TB502-3X-520-XX 数据手册

TB502-3x-520-xx

Test Board for chip evaluation and Layout recommendations

A generic test board for the PLL502-3x and PLL520-0x/-1x/-2x/-3x/-4x/-7x

In order to provide an example of recommended layout for PLL502-3x and PLL520-xx products, PhaseLink provides a

generic test board for these parts. Test boards are available for both TSSOP and SOIC 16 pin components.

In addition, the test board is designed to simplify the testing of the PLL502-3x and PLL520-xx parts. It includes selection

jumpers allowing the user to easily configure the selector pins (connecting them to GND or leaving them unconnected) as

necessary. Depending on the parts under evaluation, these selector pins allow the user to enable or disable the phase

locked loop, or even select a multiplier value (see the datasheet of each part for details).

General Layout recommendations

While this test board achieves satisfactory decoupling results, best results are achieved when the chip or die are laid out

into the final PCB, following the recommendations indicated in the data sheet.

+3.3V

4.7 uf

0.1uf

0.01 uf

CLKC

-10 db out

Evaluation Chip

VDDA

XIN

XOUT

VCON

GNDA

GND

CLKC

VDD

CLKT

GND

Vin - PECL

CRYSTAL

502-38

CLKT

Vcontrol

0 or 10 ohms

0.1uf

0.01 uf

-10 db out

JP1

JP2

JP3

JP4

Jumper Selections

NOTE:

For PECL and PECL outputs: 50W resistors (R1 and R2) should be installed.

For CMOS output: 50W resistors (R1 and R2) should be removed.

In particular, it is essential to include decoupling (by-pass) capacitors as close to the chip as possible in order to minimize

noise sensitivity from the power-supply and thus achieve best phase noise and jitter performance. The generic test board

provides positions for by-pass capacitors (C1, C2, C3) in order to decouple VDD and GND. An additional by-pass capacitor

(C4) is provisioned in order to optimize the signal path coming in from Vcontrol.

47745 Fremont Blvd., Fremont, California 94538 TEL (510) 492-0990 FAX (510) 492-0991

Rev 2/20/02 Page 1

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