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gigoptix |
iT3018E
12.5-Gb/s High-Gain RX Limiter Amplifier
Description
Features
www.DataSheet4U.com
The iT3018E is a RoHS-6-compliant limiting amplifier for use as a post amplifier in OC-
192 and STM-64 optical receivers. Differential signals as small as +/-6 mVpp can be
amplified to 2.2 Vpp differential. The device includes offset correction and output voltage
control. Both AC and DC coupling are allowed at both input and output. The high
sensitivity of the iT3018E allows the device to be used at the output of a transimpedance
amplifier.
¾ 3 dB bandwidth: 10 GHz
¾ Differential gain: 50 dB
¾ Saturated output: 1.1 Vpp, each output
into 50 ohms
¾ Input sensitivity 3.0 mVpp at BER<1E-12
¾ Single bias supply: -5.2 V
¾ Power consumption: 624 mW
¾ Bias current: 120 mA
¾ DC offset correction
¾ Amplitude voltage control
¾ Low RMS jitter
¾ RoHS-6-compliant 4x4 mm QFN (MO-220) package
Absolute
Maximum
Ratings
S ymbol Parameters/conditions
Vee1,2
Pow er supply voltage
Vd Applied voltage at data input (differential)
Vm Applied voltage at data input (single ended)
Ioffset(+),(-) Offset control current
Tch Maximum channel temperature
Tstg Storage temperature
Min.
-8
-65
Max.
0
3
1.5
5
150
150
Units
V
V
V
mA
oC
°C
Recommended
Operating
Conditions
Sym bol
Tc
Vee1
Vee2
Iee1+Iee2
Voffset (+)
Voffset (-)
Vctrl
Vd
Param eters/conditions
Operating temperature range (Tcase)
Pow er supply voltage
Pow er supply voltage
Total bias supply current
Offset control voltage
Offset control voltage
Amplitude voltage control
Applied peak to peak voltage at data input (differential)
Vm
Vindc
R
Applied peak to peak voltage at data input (single ended)
Input/output interface
DC input voltage (w ith DC-coupled input)
Bit rate
M in.
0
-5.45
-5.45
102
-5
-5
-5.2
6
Typ.
-5.2
-5.2
120
M ax.
85
-4.95
-4.95
132
5
5
0
1000
12 1000
AC and DC coupled
-0.5 0.5
12.5
Units
oC
V
V
mA
V
V
V
mV
mV
V
Gb/s
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
1
iT3018E
12.5-Gb/s High-Gain RX Limiter Amplifier
Electrical
Characteristics
At ambient
temperature
Vee1,2 = -5.2 V
www.DataSheet4U.com
S-Parameter Data
Measured on
connectorized
evaluation board
Vee1 = Vee2 = -5.2 V
Iee1+Iee2 = 120 mA
S y m bo l
P
G
B3dB
RLin
RLout
Vin
Vout
Parame te rs/conditions
Pow er consumption
Differential small signal gain
3 dB bandw idth
Input return loss (up to 10 GHz)
Output return loss (up to 10 GHz)
Input sensitivity -- differential input
(BER<1E-12, 223-1PRBS, 12.5 Gb/s)
Output peak to peak voltage (either Q or /Q)
Mi n .
530
49
9
10
10
+/-3
Typ. Max.
624 686
50
10
20
15
Un i ts
mW
dB
GHz
dB
dB
mVpp
∆Vout
Voutdc
Trse
Tf s e
Jpp
Jrms*
Output DC coupled (Vctrl=0 V for max. voltage)
Output AC coupled (Vctrl=0 V for max. voltage)
Vout sensitivity vs bias (Vee=-5.2 V +/-5%)
DC output voltage (DC coupled to 50 ohm load)
Rise time (20% - 80%)
Fall time (20% - 80%)
Jitter peak to peak
Jitter RMS degradation
Jrms*=(Jmeas^2-Jthru^2)^.5
1010
740
-750
1100
800
-650
24
22
12
1.2
+/-11
-550
30
26
17
1.8
mVpp
mVpp
%
mV
ps
ps
ps
ps
iT3018E Single Ended Gain
52
48
44
40
36
32
28
24
20
16
12
8
4
0
0 2 4 6 8 10 12 14 16 18
Freq. (GHz)
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
0
iT3018E Input Return Loss
2 4 6 8 10 12 14 16 18
Freq. (GHz)
iT3018E Output Return Loss
iT3018E Isolation
00
-5 -10
-10 -20
-15 -30
-20 -40
-25 -50
-30 -60
-35 -70
-40 -80
-45 -90
-50 -100
0 2 4 6 8 10 12 14 16 18
Freq. (GHz)
0 2 4 6 8 10 12 14 16 18
Freq. (GHz)
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
2
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