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PDF SY88993AL Data sheet ( Hoja de datos )
| Número de pieza | SY88993AL | |
| Descripción | 3.3V 3.2Gbps High-Speed Limiting Post Amplifier | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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SY88993AL
3.3V 3.2Gbps High-Speed Limiting Post
Amplifier with High Input Sensitivity
General Description
The SY88993AL limiting post amplifier, with its wide
bandwidth, is ideal for use as a post amplifier in fiber-optic
receivers with data rates up to 3.2Gbps. Signals as small
as 4mVPP can be amplified to drive devices with CML
inputs or AC-coupled PECL inputs. The SY88993AL
generates a chatter-free Loss-of-Signal (LOS) open
collector TTL output using an external resistor, as shown
Figure 1.
The SY88993AL incorporates a programmable level detect
function to identify when the input signal has been lost.
This information can be fed back to the /EN input of the
device to maintain stability under loss of signal conditions.
Using LOSLVL pin the sensitivity of the level detect can be
adjusted. The LOSLVL voltage can be set by connecting a
resistor divider between VCC and VREF, Figure 5.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Features
• Up to 3.2Gbps operation
• Low noise CML data outputs
• Chatter-Free LOS generation
• Open Collector TTL LOS output
• TTL /EN Input
• Differential PECL inputs for data
• Single 3.3V power supply
• Available in a tiny 10-pin (3mm x 3mm) MSOP
Applications
• PON
• SFP/SFF/GBIC optical transceivers
• Gigabit Ethernet
• 1X and 2X Fibre Channel
• SONET/SDH: OC 3/12/24/48 – STM 1/4/8/16
• Line driver and line receiver
Markets
• FTTX
• Datacom/Telecom
Figure 1. LOSLVL resistor configuration
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 2008
M9999-093008-A
[email protected] or (408) 955-1690
1 page  
Micrel, Inc.
AC Electrical Characteristics
VCC = +3.3V ±10%; RLOAD = 50Ω to VCC; TA = -40°C to +85°C, unless noted.
Symbol Parameter
Condition
Min Typ
LOSAH
LOSDH
HYSH
LOSAM
LOSDM
HYSM
LOSAL
LOSDL
HYSL
PSRR
High LOS Assert Level
High LOS De-assert Level
High LOS Hysteresis
Medium LOS Assert Level
Medium LOS De-assert Level
Medium LOS Hysteresis
Low LOS Assert Level
Low LOS De-assert Level
Low LOS Hysteresis
Power Supply Rejection Ratio
VLOSLVL = VCC
VLOSLVL = VCC
VLOSLVL = VCC – 400mV
VLOSLVL = VCC – 400mV
VLOSLVL = VCC – 800mV
VLOSLVL = VCC – 800mV
Note 4
30 43
83
2 5.6
20 31
55
2 5.6
10 19
31
2 5.6
35
tOFFL
tOFFH
tONL
tr, tf
LOS Release Time Minimum Input
LOS Release Time Maximum Input
LOS Assert Time
Differential Output Rise/Fall Time
(20% to 80%)
Note 5
Note 5
Note 5
Note 6
0.1
0.1
0.2
60
VID
VOD
VSR
AV(Diff)
B–3dB
S21
Input Voltage Range
Differential Output Voltage Swing
LOS Sensitivity Range
Differential Voltage Gain
3dB Bandwidth
Single-Ended Small Signal-Gain
Note 7, 8, 9, 10
4
700 800
4
38
2.5
26 32
Notes:
4. Input referred noise = RMS output noise/low frequency gain. Input referred, 55MHz.
5. Input is a 200MHz square wave, tr < 300ps.
6. With input signal VID > 50mVPP with 50Ω load.
7. Input is a 200MHz square wave, tr < 300ps, 50Ω load.
8. VID > 10mVPP.
9. Output levels are based on 50Ω impedance. If the load impedance is different, the output level will be changed.
10. See output structure.
SY88993AL
Max
95
8
65
8
45
8
0.5
0.5
0.5
120
1800
950
50
Units
mVPP
mVPP
dB
mVPP
mVPP
dB
mVPP
mVPP
dB
dB
µs
µs
µs
Ps
mVPP
mVPP
mVPP
DB
GHz
dB
September 2008
5 M9999-093008-A
[email protected] or (408) 955-1690
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet SY88993AL.PDF ] | |
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