SY88903AL Ver la hoja de datos (PDF) - Micrel
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SY88903AL Datasheet PDF : 9 Pages
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Micrel, Inc.
SY88903AL
AC Electrical Characteristics
VCC = 3.0 to 3.6V; RL = 50Ω to VCC-2V; TA = –40°C to +85°C, typical values at VCC = 3.3V, TA = 25°C.
Symbol Parameter
Condition
Min
Typ
Max Units
tr, tf
Output Rise/Fall Time
(20% to 80%)
Note 3
ps
260
tJITTER
Deterministic
Random
Note 4
Note 5
15
psPP
5
psRMS
VID
Differential Input Voltage Swing See Figure 1
5
1800
mVPP
VOD
Differential Output Voltage
VID > 18mVPP, See Figure 1
Swing
1500
mVPP
tOFF
LOS Release Time
Note 8
40
500
ns
tON
LOSAL
LOS Assert Time
Low LOS Assert Level
Note 8
RLOSLVL = 15kΩ, Note 6
125
500
ns
2.3
mVPP
LOSDL
Low LOS De-assert Level
RLOSLVL = 15kΩ, Note 6
3.4
mVPP
HSYL
Low LOS Hysteresis
RLOSLVL = 15kΩ, Note 7
3.4
dB
LOSAM
Medium LOS Assert Level
RLOSLVL = 5kΩ, Note 6
2
4.2
mVPP
LOSDM
Medium LOS De-assert Level
RLOSLVL = 5kΩ, Note 6
6.2
9
mVPP
HSYM
Medium LOS Hysteresis
RLOSLVL = 5kΩ, Note 7
2
3.4
5
dB
LOSAH
High LOS Assert Level
RLOSLVL = 100Ω, Note 6
8
10.8
mVPP
LOSDH
High LOS De-assert Level
RLOSLVL = 100Ω, Note 6
16.4
21
mVPP
HSYH
High LOS Hysteresis
RLOSLVL = 100Ω, Note 7
2
3.4
5
dB
B-3dB
3dB Bandwidth
1
GHz
AV(Diff)
Differential Voltage Gain
42
dB
S21
Single-Ended Small-Signal Gain
30
36
dB
Notes:
3. Amplifier in limiting mode. Input is a 200MHz square wave.
4. Deterministic jitter measured using 1.25Gbps K28.5 pattern, VID = 10mVPP.
5. Random jitter measured using 1.25Gbps K28.7 pattern, VID = 10mVPP.
6. 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.
7. 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.
8. 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).
February 2007
5
M9999-021707-D
hbwhelp@micrel.com or (408) 955-1690
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