1
Electronic Components
November 6, 2002
GTD-18442 Rev. 5.0
KGL4126F
10.7 Gbps Mach-Zehnder Modulator Driver IC
1/9
FEATURES
High Output Voltage: Maximum Amplitude > 5.0 Vpp
X-Point Control Function
Output Amplitude Control Function
FUNCTION DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Parameter
Symbol
Min
Max
Unit
Note
Supply Voltage
VS
-6.5
0.3
V
X-Point Control Voltage
VB1
VS-4.5
(Min. -6.5)
VS+2.4
(Max. 0.3)
V
Output Amplitude Control Voltage
VC1
-6.5
VS+1.2
(Max. 0.3)
V
DC Bias for Output Stage Amplifier
VD
0
5.0
V
Operating Temperature at Package Base
Ts
-10
100
C
Storage Temperature
Tst
-40
125
C
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Min
Typ
Max
Unit
Supply Voltage
VS
-5.46
-4.94
V
Supply Voltage
*1,2
VD
2.0
3.5
V
X-Point Control Voltage
VB1
VS+0.8
VS+2.2
V
Output Amplitude Control Voltage
*1
VC1
VS
VS+1.0
V
Operating Temperature at Package Base
Ts
0
85
C
Input Interface
AC coupled (External blocking capacitor is required)
Output Interface
AC coupled (External Bias-T is required for VD)
*1 Output Amplitude can be controlled by VC1 and VD voltage. We recommend to control output amplitude by
VD voltage. ( VD is more effective than VC1. )
*2 VD is supplied at Output Port using External Bias-T.
OUT
IN
VB1 VB2
VS
VC1
INB
GTD-18442 Rev. 5.0
1
Electronic Components
KGL4126F
2/9
ELECTRICAL CHARACTERISTICS
Parameter
Symbol
Condition
Min
Typ
Max
Unit
Input Data Rate
NRZ
10.7
Gbps
Supply Current of VS
Iss
210
250
mA
Supply Current of VD
I
D
Supply DC Bias by Bias-T
70
100
mA
Input Amplitude
Vin
Differential (AC Coupled)
0.25
1
Vpp
Single-Ended (AC Coupled)
0.5
1
Vpp
Output Amplitude (Max)
Vo (Max)
50
load,(AC Coupled)
5.0
Vpp
X-Point Control
Xp
NRZ, 50
load
40
60
%
Output Rise/Fall Time
Tr/Tf
50
load
20%-80%
40
ps
Input Return Loss
S11
100kHz10 GHz
13
dB
PACKAGE DIMENSIONS
9.6
120.2
8.
6
12
0
.
2
20-0.3
5.08
16-1.27
1
5
6
10
11
15
16
20
0.
5
0.
5
1.
5
0.
6
0.
12
5
11
2
(Top View)
(Unit : mm)
KGL4126F
1
JAPAN
XXX
PINCONNECTION
No.
Symbol
Note
1
GND
Ground
2
GND
Ground
3
GND
Ground
4
GND
Ground
5
GND
Ground
6
GND
Ground
7
GND
Ground
8
GND
Ground
9
OUT.
Signal Output and DC Bias Port
10
GND
Ground
11
GND
Ground
12
VC1
Output Amplitude Control Port
13
VS
Supply Voltage Port
14
VB2
Input Termination Port
15
VB1
X-Point Control and Inverted
Input Termination Port
16
GND
Ground
17
INB
Inverted Input Terminal
18
GND
Ground
19
IN
Signal Input Terminal
20
GND
Ground
GTD-18442 Rev. 5.0
1
Electronic Components
KGL4126F
3/9
AC CHARACTERISTICS TEST CIRCUIT
IN
OUT
GND
Blocking
Capacitor
0.1
F
VB1
KGL4126F
INB
VB2
VS
VC1
Bias-T
OSCILLO
-SCOPE
PULSE
PATTERN
GENERATOR
Fc=7.5GHz
Bessel
Filter
P
o
w
e
r
S
uppl
y
(VB
1
)
P
o
w
e
r
S
uppl
y
(VS)
P
o
w
e
r
S
uppl
y
(VC
1
)
0.1
F
0.1
F
0.1
F
50
Transmission Line
50
Transmission Line
P
o
w
e
r
S
uppl
y
(VD)
GTD-18442 Rev. 5.0
1
Electronic Components
KGL4126F
4/9
TYPICAL CHARACTERISTICS ( WAVEFORM )
Measured Condition ( @
25
C )
Display Factor V : 1.0V/div, H : 20 ps/div, Offset : 0V
Input Signal
10.7Gbps, NRZ, PN31, Differential 0.25Vpp, AC Coupled
Tr/Tf(20-80%)
40ps ( through 7.5GHz Bessel Filters )
Waveform @10.7Gbps Operate
@4.0Vpp
@4.5Vpp
@5.0Vpp
Note
JitterP-P means " 6
Jitter(RMS) ".
VS
: -5.0V
Iss
: 207.7mA
VB1
: -3.75V Crossing-Point : 50.1%
VC1
: -4.0V
VD
: 2.475V I
D
: 52.4mA
Power
: 1.168W
Amplitude: 4.003Vpp
Tr :
27.6ps
Tf :
27.1ps
JitterP-P : 10.9ps
VS
: -5.0V
Iss
: 207.7mA
VB1
: -3.74V Crossing-Point [%] : 50.2%
VC1
: -4.0V
VD
: 2.83V
I
D
: 60.1mA
Power
: 1.208W
Amplitude: 4.506Vpp
Tr
: 28.0ps
Tf
: 28.0ps
JitterP-P : 10.8ps
VS
: -5.0V
Iss
: 207.6mA
VB1
: -3.74V Crossing-Point : 50.1%
VC1
: -4.0V
VD
: 3.22V
I
D
: 67.3mA
Power
: 1.255W
Amplitude: 5.005Vpp
Tr
: 29.3ps
Tf
: 28.4ps
JitterP-P : 10.9ps
GTD-18442 Rev. 5.0
1
Electronic Components
KGL4126F
5/9
TYPICAL CHARACTERISTICS ( SUPPLY VOLTAGE DEPENDENCE : VD )
Measured Condition ( @25
C )
Input Signal 10.7Gbps NRZ PRBS31, Differential 0.25Vpp
VS=-5.0V, VB1@Xp
50%, VC1=-4.0V
3.0
3.5
4.0
4.5
5.0
5.5
6.0
2.0
2.5
3.0
3.5
4.0
V
D
(V)
A
m
pl
i
t
ude (
V
p
p
)
Amplitude
0
10
20
30
40
2.0
2.5
3.0
3.5
4.0
V
D
(V)
Tr
/
T
f
(
p
s
)
Rise Time
Fall Time
Rise/Fall Time (20%-80%)
0
5
10
15
20
2.0
2.5
3.0
3.5
4.0
V
D
(V)
J
i
tte
r
P
-
P
(
p
s
)
JitterP-P
0
50
100
150
200
250
300
2
2.5
3
3.5
4
V
D
(V)
S
u
p
p
l
y
C
u
rre
n
t
(m
A
)
Iss
ID
Supply Current
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