Microchip SY88793V Bedienungsanleitung
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1
SY88793V Evaluation Board
Micrel
[email protected] or (408) 955-1690
DESCRIPTION
The SY88793V features:
■Single 3.3V or 5V power supply
■Up to 622Mbps operation
■Low noise PECL data outputs
■Chatter-free TTL Signal Detect (SD) output
■TTL EN input
■Programmable SD level set (SD
LVL
)
■Available in tiny 10-pin MSOP (3mm
××
××
×3mm)
package
The SY88793V 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/TTL SIGNAL DETECT
SY88793V
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 SY88793V 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 SY88793V
quantizes these signals and outputs PECL level waveforms.
The SY88793V 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 SY88793V generates a TTL 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 deasserts low otherwise. EN deasserts the true output
signal without removing the input signal. Typically 6dB SD
hysteresis is provided to prevent chattering.
This manual provides information on the SY88793V
evaluation board. It should be used in conjunction with the
SY88793V data sheet, which contains full specifications of
the SY88793V.
The SY88793V evaluation board enables fast and
thorough evaluation of the SY88793V 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 SY88793V.
The SY88793V 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 SY88793V, 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.SY88793V Evaluation Board
Produktspezifikationen
| Marke: | Microchip |
| Kategorie: | Nicht kategorisiert |
| Modell: | SY88793V |
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