Microchip SY88713V Handleiding

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1

SY88713V Evaluation Board

Micrel

[email protected] or (408) 955-1690

DESCRIPTION

The SY88713V features:

■Single 3.3V or 5V power supply

■Up to 622Mbps operation

■Low noise PECL data outputs

■Chatter-free PECL Signal Detect (SD) output

■TTL /EN input

■Programmable SD level set (SD

LVL

)

■Available in a tiny 10-pin MSOP (3mm

××

××

×3mm)

package

The SY88713V evaluation board features:

■AC-coupled I/O with SMA connectors

■Single potentiometer to set SD

LVL

■50Ω input network termination

FUNCTIONAL FEATURES

3.3V/5V 622Mbps PECL LOW-POWER

LIMITING POST AMPLIFIER

w/PECL SIGNAL DETECT

SY88713V

EVALUATION BOARD

AVAILABLE MEASUREMENTS

■Frequency performance

■Output eye pattern generation

■Mask testing

■Jitter

■Output rise/fall time

■BER testing

■Hysteresis measurement

Rev.: AAmendment: /0

Issue Date:March 2004

The SY88713V low-power, limiting post amplifier is

designed for use in fiber optic receivers. The device connects

to typical transimpedance amplifiers (TIAs). The linear signal

output from TIAs can contain significant amounts of noise

and may vary in amplitude over time. The SY88713V

quantizes these signals and outputs PECL level waveforms.

The SY88713V operates from a single +3.3V or +5V

power supply, over temperatures ranging from –40°C to

+85°C. With its wide bandwidth and high gain, signals with

data rates up to 622Mbps and as small as 5mV

pp

can be

amplified to drive devices with PECL inputs.

The SY88713V generates a PECL SD output. A

programmable, signal-detect level set pin (SD

LVL

) sets the

sensitivity of the input amplitude detection. SD asserts high

if the input amplitude rises above the threshold set by SD

LVL

and de-asserts low otherwise. /EN de-asserts the true output

signal without removing the input signal. Typically 4.6dB

SD hysteresis is provided to prevent chattering.

This guide provides information on the SY88713V

evaluation board. It should be used in conjunction with the

SY88713V data sheet, which contains full specifications of

the SY88713V.

The SY88713V evaluation board enables fast and

thorough evaluation of the SY88713V 622Mbps PECL low-

power, limiting post-amplifier. The board is an easy-to-use,

single-layer high-speed microstrip design. It is designed to

be driven by a high-speed 622Mbps pattern generator and

provides on-board 50Ω terminations for the generator’s

outputs. The input termination network also provides the

required input bias of V

CC

–1.3V for the SY88713V.

The SY88713V evaluation board is intended to be

terminated to a 50Ω scope and provides for simple user

adjustability of the SD threshold through the adjustment of

an on-board potentiometer. This allows the user to evaluate

various parameters of the SY88713V, as listed in the

“Available Measurements” section of this document.

All data sheets and support documentation can be found

on Micrel’s web site at www.micrel.com.

EVALUATION BOARD

Figure 1. SY88713V Evaluation Board

Product specificaties