iT3018E
12.5-Gb/s High-Gain RX Limiter Amplifier
Description
The iT3018E is a RoHS-6-compliant limiting amplifier for use as a post amplifier in OC192 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.
Features
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)
Min.
Max.
Units
-8
0
V
Ioffset(+),(-) Offset control current
Recommended
Operating
Conditions
Tch
Maximum channel temperature
Tstg
Storage temperature
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
Applied peak to peak voltage at data input (single ended)
Input/output interface
DC input voltage (w ith DC-coupled input)
Bit rate
Vindc
R
-65
Min.
0
-5.45
-5.45
102
-5
-5
-5.2
6
3
V
1.5
V
5
mA
150
o
150
°C
Typ.
-5.2
-5.2
120
12
C
Max.
85
-4.95
-4.95
132
5
5
0
1000
Units
o
C
V
V
mA
V
V
V
mV
1000
mV
0.5
12.5
V
Gb/s
AC and DC coupled
-0.5
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
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iT3018E
12.5-Gb/s High-Gain RX Limiter Amplifier
Electrical
Characteristics
At ambient
temperature
Vee1,2 = -5.2 V
Symbol
Parame te rs/conditions
Min.
Typ.
Max.
Units
P
Pow er consumption
530
624
686
mW
G
Differential small signal gain
49
50
dB
B3dB
3 dB bandw idth
9
10
GHz
RLin
Input return loss (up to 10 GHz)
10
20
dB
RLout
Output return loss (up to 10 GHz)
10
15
dB
Vin
Input sensitivity -- differential input
(BER<1E-12, 223-1PRBS, 12.5 Gb/s)
Vout
Output peak to peak voltage (either Q or /Q)
Output DC coupled (Vctrl=0 V for max. voltage)
1010
1100
mVpp
Output AC coupled (Vctrl=0 V for max. voltage)
740
800
mVpp
-750
-650
Vout sensitivity vs bias (Vee=-5.2 V +/-5%)
Trse
Rise time (20% - 80%)
24
30
ps
Tfse
Fall time (20% - 80%)
22
26
ps
Jpp
Jitter peak to peak
12
17
ps
Jrms*
Jitter RMS degradation
Jrms*=(Jmeas^2-Jthru^2)^.5
1.2
1.8
ps
DC output voltage (DC coupled to 50 ohm load)
%
-550
mV
0
52
48
44
40
36
32
28
24
20
16
12
8
4
0
-5
-10
S11 (dB)
-15
-20
-25
-30
-35
-40
-45
-50
0
2
4
6
8
10
12
Freq. (GHz)
14
16
0
18
2
4
0
-5
-10
-10
-20
-30
-15
S12 (dB)
-20
-25
-30
-35
-40
8
10
16
18
-70
-80
-90
Freq. (GHz)
14
-60
-100
6
12
-50
-50
4
10
-40
-45
2
8
iT3018E Isolation
0
0
6
Freq. (GHz)
iT3018E Output Return Loss
S22 (dB)
+/-11
iT3018E Input Return Loss
iT3018E Single Ended Gain
S21 (dB)
Vee1 = Vee2 = -5.2 V
Iee1+Iee2 = 120 mA
mVpp
∆Vout
Voutdc
S-Parameter Data
Measured on
connectorized
evaluation board
+/-3
12
14
16
18
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,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
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iT3018E
12.5-Gb/s High-Gain RX Limiter Amplifier
Eye Diagram
Performance
Vee1 = Vee2 = -5.2 V
Iee1+Iee2 = 120 mA
Bit rate: 10.7 Gb/s
Vin=+/-5 mVpp, Vout=+/-1 Vpp
Bit rate: 10.7 Gb/s
Vin=+/-8 mVpp, Vout=+/-1.1 mVpp
Bit rate: 10.7 Gb/s
Vin=+/-30 mVpp, Vout=+/-1.1 Vpp
Bit rate: 12.5 Gb/s
Vin=+/-5 mVpp, Vout=+/-1Vpp
Bit rate: 12.5 Gb/s
Vin=+/-8 mVpp, Vout=+/-1.1 mVpp
Bit rate: 12.5 Gb/s
Vin=+/-30 mVpp, Vout=+/-1.1 Vpp
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
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iT3018E
12.5-Gb/s High-Gain RX Limiter Amplifier
Eye Diagram
Performance
vs. Input
Voltage
(cont.)
Bit rate: 10.7 Gb/s
Vin=+/-200 mVpp, Vout=+/-1.1 Vpp
Bit rate: 10.7 Gb/s
Vin=+/-1 Vpp, Vout=+/-1.1 Vpp
Bit rate: 12.5 Gb/s
Vin=+/-200 mVpp, Vout=+/-1.1 Vpp
Bit rate: 12.5 Gb/s
Vin=+/-1 Vpp, Vout=+/-1.1 Vpp
Input
Sensitivity
Vee1 = Vee2 = -5.2 V
Iee1+Iee2 = 120 mA
Input Sensitivity= 3mVpp Differential input up to 12.5 Gb/s
BER<1E-12. Output voltage = 930 mVpp single-ended
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
4
iT3018E
12.5-Gb/s High-Gain RX Limiter Amplifier
Input/Output Characteristic
1150
1100
1050
1000
950
900
850
800
750
700
Output Voltage (+/- mV)
Output Voltage (+/- mV)
Input/Output Characteristic
Performance
As Function
Of Input
Voltage
0
2
4
6
1150
1100
1050
1000
950
900
850
800
750
700
1
8 10 12 14 16 18 20
10
100
1000
Input (+/- mV)
Input (+/- mV)
Peak to Peak Jitter vs Input
40
0
-200
-400
-600
-800
-1000
-1200
-1400
35
Jitter (pp-psec)
D C O u tp u t ( m V )
Input/Output DC Characteristic
-280 -240 -200 -160 -120 -80 -40 0
10.7 Gb/s
30
12.5 Gb/s
25
20
15
10
5
40 80 120 160 200 240 280
0
DC Input Offset (*)(mV)
1
10
100
1000
Input Amplitude (mV pp)
Rise Tim e Vs. Input Voltage @ 12.5 Gb/s
Fall Tim e vs Input Voltage @ 12.5 Gb/s
35
35
30
25
Fall Time (psec)
Rise Time (psec)
30
20
15
10
5
25
20
15
10
5
0
1
10
100
1000
0
1
Input Amplitude (+/-mV pp)
10
100
1000
Input Amplitude (+/- mV pp)
(*) Input applied to the offset control pin (Voffset1), open output.
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
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iT3018E
12.5-Gb/s High-Gain RX Limiter Amplifier
Eye Am plitude vs Vctrl
Pow er Supply Current
1200
130
1000
120
800
110
Current (mA)
Eye Amplitude (mV)
Output
Voltage
Control
600
400
200
100
90
80
70
0
60
-200
-6
-4
-2
0
-6
Control Voltage Vctrl (Volts)
-5
-4
-3
-2
-1
0
Control Voltage (V)
Bit rate: 12.5 Gb/s, Vtrl=-1.7 V
Vin = +/-200 mVpp, Vout = +/-602 mVpp
Bit rate: 12.5 Gb/s, Vtrl=-2.8 V
Vin = +/-200 mVpp, Vou t= +/-260 mVpp
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
6
iT3018E
12.5-Gb/s High-Gain RX Limiter Amplifier
Recommended
Operational
Setup
Apply –5.2 V at Vee1
and Vee2
Apply 0 V at Vctrl for
maximum output
Vctrl
1 µF
560 pF
560 pF
1 µF
DC blocking
capacitors optional
Voffset (+)
VL1
0.1 µ F
/Q
Din
RF Input
VL2
IT3018E
RF Output
Q
/Din
Vee1 Vcb Vee2
Voffset (-)
Vee = -5.2 V
0.1 µ F
560 pF
1µF
Vee = -5.2 V
1µF
560 pF
1 µF
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
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iT3018E
12.5-Gb/s High-Gain RX Limiter Amplifier
“E” Package
Drawings,
Pinouts,
Marking
Notes:
Dimensions in
inches (mm)
Tolerances are
±0.0039 in. (0.100 mm)
Package drawing
encompasses JEDEC
MO-220 Version
VGGC-2.
See iTerra Application
Note 10 for
recommended pad
layout. RoHS parts
are backward
compatible if
application note pad
layout is followed.
Lead frame material is
copper alloy.
Mold compound is
UL94V0 compliant.
Lead finish is NiPdAu.
Marking Information
iTerra
MMMMEA
XXNNNN
LLYYWW
Where,
MMMM = part no.
E = Package Type
A =Temp. Range
XX = Wafer Lot
NNNN = Ser. No.
LLYYWW =MFG D/C
Pinouts
P1: GND
P2: Din (RF input)
P3: /Din (/RF input)
P4: GND
P5: Voffset (-)
P6: Vee1
P7: Vcb
P8: Vee2
P9: GND
P10: Q (RF Out)
P11: /Q (/RF Out)
P12: GND
P13: VL1
P14: Vctrl (voltage control)
P15: VL2
P16: Voffset (+)
For pricing, delivery, and ordering information, please contact GigOptix at (650) 424-1937,
e-mail: sales@gigoptix.com, or visit our site at www.GigOptix.com.
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