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PDF SY88063AL Data sheet ( Hoja de datos )
| Número de pieza | SY88063AL | |
| Descripción | 12.5Gbps Limiting Post Amplifier | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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SY88063AL
3.3V, 12.5Gbps Limiting Post Amplifier with
Automatic Digital Offset Correction
General Description
Features
The SY88063AL is a multi-rate limiting post amplifier
designed for fiber-optic transceivers applications up to
12.5Gbps. It features an automatic digital offset correction
function. The offset correction feature will automatically
counteract any inherent offset present in the input signal
and amplifier. The highly sensitive SY88063AL can amplify
input signals as low as 20mVpp at 12.5Gbps or 10mVpp at
10.3Gbps to differential CML output levels.
The SY88063AL generates a loss-of-signal (LOS) open-
collector TTL output. A programmable loss-of-signal level
set pin (LOSLVL) sets the sensitivity of the input amplitude
detection. LOS asserts high if the input amplitude falls
below the threshold set by LOSLVL and de-asserts low
otherwise. The enable input (/EN) de-asserts the true
output signal without removing the input signal. The LOS
output can be fed back to the /EN input to implement the
squelch function that maintains output stability under a
loss-of-signal condition.
The SY88063AL operates from a single +3.3V power
supply, over –40oC to +85oC, and is available in 3mm x
3mm 16-pin QFN package.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
• Up to 12.5Gbps operation
• Automatic Digital Offset Correction
• Programmable LOS level (LOSLVL)
• Squelching function to maintain output stability
• Low-noise CML data outputs
• TTL /EN input
• –40oC to +85oC Operation
• Small 3mm x 3mm QFN package
Applications
• 1x/2x/4x/8x Fibre Channel
• SR/LR SFP+ Optical Transceiver
• 10GPON ONU
• SONET/SDH:OC192 – STM64
Markets
• Datacom/telecom
• Optical transceiver
________________________________________________________________________________________________
Typical Application
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
September 2011
M9999-090911-B
[email protected] or (408) 955-1690
1 page  
Micrel, Inc.
SY88063AL
AC Electrical Characteristics
VCC = 3.0 to 3.6V; RLoad = 50Ω to VCC; TA = –40°C to +85°C, typical values at VCC = 3.3V, TA = 25°C.
Symbol Parameter
Condition
Min.
Typ.
Max.
Units
FIN Input Data Rate
Output Rise/Fall Time
tr, tf (20% to 80%)
NRZ Data
Note 4
1.25 12.5 Gbps
25 35
ps
tJITTER
VID
VOD
Deterministic
Random
Differential Input Voltage Swing
Differential Output Voltage
Swing
Note 5
Note 6
FIN = 12.5Gbps
FIN = 10.3Gbps
Note 4
10 psPP
1 psRMS
20
10
1800
mVPP
600 700 800 mVPP
TOFF
TON
LOSAL
LOS Release Time
LOS Assert Time
Low LOS Assert Level
Note 9
Note 9
RLOSLVL = 10kΩ, Note 7
100 500
ns
100 500
ns
9 11 13 mVPP
LOSDL
HSYL
LOSAM
LOSDM
HSYM
LOSAH
LOSDH
HSYH
Low LOS De-Assert Level
Low LOS Hysteresis
Medium LOS Assert Level
Medium LOS De-Assert Level
Medium LOS Hysteresis
High LOS Assert Level
High LOS De-Assert Level
High LOS Hysteresis
RLOSLVL = 10kΩ, Note 7
RLOSLVL = 10kΩ, Note 8
RLOSLVL = 5kΩ, Note 7
RLOSLVL = 5kΩ, Note 7
RLOSLVL = 5kΩ, Note 8
RLOSLVL = 100Ω, Note 7
RLOSLVL = 100Ω, Note 7
RLOSLVL = 100Ω, Note 8
14 16 19 mVPP
2 3.5 4
dB
16 18 21 mVPP
23 26 29 mVPP
2 3 4 dB
40 46 54 mVPP
61 68 74 mVPP
2 3 4 dB
B-3dB
AV(Diff)
S21
3dB Bandwidth
Differential Voltage Gain
Single-Ended Small-Signal Gain
10
38
26 32
GHz
dB
dB
Notes:
4. Amplifier in limiting mode. Input is a 200MHz square wave.
5. Deterministic jitter measured using 10 Gbps K28.5 pattern, VID = 60mVPP.
6. Random jitter measured using 10Gbps K28.7 pattern, VID = 60mVPP.
7. See “Typical Operating Characteristics” for a graph showing how to choose a particular RLOSLVL for a particular LOS assert and its associated
de-assert amplitude.
8. This specification defines electrical hysteresis as 20log (LOS De-Assert/LOS Assert). The ratio between optical hysteresis and electrical
hysteresis is found to vary between 1.5 and 2 depending upon the level of received optical power and ROSA characteristics. Based on that
ratio, the optical hysteresis corresponding to the electrical hysteresis range 1dB-4.5 dB, shown in the AC characteristics table, will be 0.5dB-
3dB Optical Hysteresis.
9. In real world applications, the LOS Release/Assert time can be strongly influenced by the RC time constant of the AC-coupling cap and the
50Ω input termination. To keep this time low, use a decoupling cap with the lowest value that is allowed by the data rate and the number of
consecutive identical bits in the application (typical values are in the range of 0.001µF to 1.0µF).
September 2011
5 M9999-090911-B
[email protected] or (408) 955-1690
5 Page 
Micrel, Inc.
Package Information
SY88063AL
16-Pin (3mm × 3mm) QFN
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information furnished in this data sheet. This
information is not intended as a warranty and Micrel does not assume responsibility for its use. Micrel reserves the right to change circuitry,
specifications and descriptions at any time without notice. No license, whether express, implied, arising by estoppel or otherwise, to any intellectual
property rights is granted by this document. Except as provided in Micrel’s terms and conditions of sale for such products, Micrel assumes no
liability whatsoever, and Micrel disclaims any express or implied warranty relating to the sale and/or use of Micrel products including liability or
warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical
implant into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the
user. A Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser
agrees to fully indemnify Micrel for any damages resulting from such use or sale.
© 2010 Micrel, Incorporated.
September 2011
11 M9999-090911-B
[email protected] or (408) 955-1690
11 Page | ||
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