OKI KGL4146 User Manual

Electronic Components

OUT IN

VB1 VB2 VS VC1

INB

VD

VCS

TO

October 1, 2008

ODHKGL4146-09

KGL4146

11.3 Gbps Modulator Driver IC

FEATURES

• High Output Voltage: Maximum Amplitude up to 6.0 Vpp

• X-Point Control Functio n

• Output Amplitude Control Function

• Integrated Bias Inductor

FUNCTION DIAGRAM

ABSOLUTE MAXIMUM RATINGS

Supply Voltage*1 VS -6.5 0.3 V
X-Point Control Voltage VB1

X-Point Reference Voltage VB2

Internal Amplitude Control Voltage VC1 -6.5
Cascode FET Gate Voltage VCS -1.0 0.3 x VD V

DC Bias for Output Stage Amplifier VD 0 5.5 V
Allowable Current of Output Stage ID_MAX 250 mA
Operating Temperature at Package Base Ts -10 100 °C
Storage Temperature Tst -40 125 °C

*1 Please keep VS below 0V, during power of VD supplied.

Pre-Driver

Parameter Symbol Min Max Unit Note

VS-4.5

(Min. -6.5)

VS-4.5

(Min. -6.5)

Booster-Amp

VS+2.4

(Max. 0.3)

VS+2.4

(Max. 0.3)

VS+1.2

(Max. 0.3)

V

V

V

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ODHKGL4146-09

KGL4146

RECOMMENDED OPERATING CONDITIONS

Parameter Symbol Min Typ Max Unit
Supply Voltage VS -5.46 -4.94 V
X-Point Control Voltage VB1 VS+0.8 VS+1.7 V
X-Point Reference Voltage*1 VB2 -4.2 -3.95 -3.7 V
Internal Amplitude Control Voltage VC1 VS VS+1.0 V
Cascode FET Gate Voltage*2 VCS 0 0.25 x VD V
DC Bias for Output Stage Amplifier
Operating Temperature at Package Base Ts 0 85 °C
Input Interface AC coupled (External blocking capacitor is required)
Output Interface AC coupled (External blocking capacitor is required)

*3, 4

VD 0.5 5.0 V

*1 VB2 can be open.
For VB2 opened, VB2 is biased at about –3.95V (VS=-5.2V).
*2 VCS can be open.
For VCS opened, VCS is biased at about 1.2V (VD=5.0V).
*3 Output Amplitude can be tuned by control voltage VD.
*4 External inductor for low frequency is required.

ELECTRICAL CHARACTERISTICS

Parameter Symbol Condition Min Typ Max Unit

Maximum Input Data Rate NRZ 11.3 Gbps

Supply Current of VS Iss

Supply Current of VD*1 ID

Power Consumption Pwr

Input Amplitude Vin

Output Amplitude (Max) Vo (Max)

Output Amplitude (Min) Vo (Min)
X-Point Control Xp NRZ , 50 load 40 60 %
Output Rise/Fall Time Tr/Tf
Input Return Loss S11 100kHz–10 GHz 13 dB

Output Return Loss S22 100kHz–10 GHz 13 dB

*1 External inductor for low frequency is required

VC1=VS+1V, VCS: Open,

Xp=50%

VC1=VS+1V, VCS: Open,

Xp=50%

Vo=6Vpp, VC1=VS+1V,

VCS: Open, Xp=50%

Differential (AC Coupled) 0.2 1 Vpp

Single-Ended (AC Coupled)

50 load, AC Coupled,

VD=5V, VC1=VS+1V,
VCS : Open, Xp=50%

50 load, AC Coupled,

Xp=50%

50 load,

20%-80%

110 mA

180 mA

1.3 W

0.4 1 Vpp

5.5 6.0 Vpp

3.0 3.5 Vpp

40 ps

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