1Electronic Components
October 26, 2001
GTD-18440 Rev. 1.0
KGL4115HW
Preliminary
10.7 Gbps EA Modulator Driver IC
1/3
FEATURES
10.7Gbps Operation
Differential Input
High Output Voltage: Maximum Amplitude > 2.7 Vpp
X-Point Control Function
Output Amplitude Control Function
Output Bias 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
Output Bias Control Voltage
VC2
-6.5
VS+2.4
(Max. 0.3)
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
-5.5
-5.0
V
X-Point Control Voltage
VB1
VS+0.8
VS+2.2
V
Output Amplitude Control Voltage
VC1
VS
VS+1.0
V
Output Bias Control Voltage
VC2
VS
VS+2.2
V
Operating Temperature at Package Base
Ts
0
70
C
Input Interface
AC coupled (External blocking capacitor is required)
Output Interface
DC coupled
OUT
IN
VB1 VB2
VS
VC1 VC2
INB
GTD-18440 Rev. 1.0
1Electronic Components
KGL4115HW
2/3
ELECTRICAL CHARACTERISTICS
Parameter
Symbol
Condition
Min
Typ
Max
Unit
Input Data Rate
NRZ
10.7
Gbps
Supply Current
Iss
including bias
current = 20 mA
285
mA
Voltage Offset
Vo (ofs)
50
load, bias
current = 20 mA
-1
0
V
Differential (AC Coupled)
0.25
1
Input Amplitude
Vin
Single-Ended (AC Coupled)
0.5
1
Vpp
Output Amplitude (Max)
Vo (Max)
50
load
2.7
Vpp
Output Low Voltage (Min)
V (LO)
50
load
-3
V
Output High Voltage (Min)
V (HI)
50
load
-1
V
X-Point Control
Xp
NRZ, 50
load
20
80
%
X-Point Stability
Del (Xp)
070C
50
load
10
%
Output Rise/Fall Time
Tr/Tf
50
load
20%/80%
40
ps
Input Return Loss
S11
100kHz10 GHz
13
dB
PACKAGE DIMENSIONS PIN ASSIGNMENT
28-0.635
7.
0
4.445
7.0
KGL4115HW
1
JAPAN
XXX
Unit : mm
1 8
25
32
24 17
16
9
(Top View)
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
GND
Ground
10
OUT
Signal Output Port
11
GND
Ground
12
GND
Ground
13
N.C.
No Connection
14
GND
Ground
15
GND
Ground
16
GND
Ground
17
GND
Ground
18
VC2
Output Bias Control Port
19
VC1
Output Amplitude Control Port
20
VS
Supply Voltage Port
21
VS
Supply Voltage Port
22
VB2
Input Termination Port
23
VB1
X-Point Control Port
24
GND
Ground
25
GND
Ground
26
GND
Ground
27
GND
Ground
28
INB
Inverted Input Terminal
29
GND
Ground
30
GND
Ground
31
IN
Signal Input Terminal
32
GND
Ground
GTD-18440 Rev. 1.0
1Electronic Components
KGL4115HW
3/3
TYPICAL APPLICATION
APPLICATION NOTE
1. For stable operation;
1-1. To prevent a dependence of "X-Point" on the supply voltage VS,
(1) Use an external voltage source of 3.8V for "VB2", or
(2) Control the voltage of "VB1", so that the voltage difference "VB1VB2" is constant.
1-2. To prevent a dependence of "Output amplitude" on the supply voltage VS,
Control the voltage of "VC1", so that the voltage difference "VC1VS" is constant.
1-3. To prevent a dependence of "Output bias control voltage" on supply voltage VS,
Control the voltage of "VC2", so that the voltage difference "VC2VS" is constant.
2. Power-up/shut-down sequence;
For power-up, supply control voltages (VB1, (VB2), VC1, VC2) at first, then Vs. For shut-down,
Vs at first, then control voltages.
Customer does not need to care about the sequence for the control voltages (VB1,(VB2),VC1,VC2).
3. Under "no signal input" condition, the operation may not be stable.
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Data Input
IN
VB1
VS
VC1
VC2
OUT
GND
Chip
Capacitor
0.1
F
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ly
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VB2
KGL4115HW
EAM
50
Chip
Capacitor
0.1
F
Blocking
Capacitor
Ex. 0.1
F
INB
Inverted Data Input
X-Point Control
Chip
Capacitor
0.1
F
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