OKI KGL4126FA User Manual

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Electronic Components

KGL4126FA

10.7 Gbps Mach-Zehnder Modulator Driver IC

FEATURES

ODHKGL4126FA-03

October 29, 2003

• High Output Voltage: Maximum Amplitude > 6.0 Vpp

• X-Point Control Function

• Output Amplitude Control Function

APPLICATIONS

! SONET OC-192 and SDH STM-64 Transmission Systems up to 10.7 Gbps ! DWDM Systems ! Optical Transmitters/Transceivers/Transponders ! SONET/SDH Test Equipment

GENERAL DESCRIPTION

The KGL4126FA is a high performance Mach Zehnder Modulator driver for SONET/SDH and 10GbE applications up to 10.7Gb/s. The device provides a single-ended output voltage > 6Vpp, output amplitude control, and duty cycle (X-Point) control.

The KGL4126FA data input accepts single ended or differential AC-coupled signals. External

Capacitors for AC Termination and Blocking Capacitors are Required.

The device provides a minimum of 6 Vpp output voltage AC coupled to a 50-ohm load. The output amplitude can be tuned by varying VD, which is supplied at the output port using an external Bias-T.

The KGL4126FA is capable of adjusting the crossing point (X-point) from 45% to 55% of the output eye diagram via the differential voltage between VB1 and VB2. The device specifications are guaranteed for all crossing points from 45% to 55%.

The KGL4126FA is packaged in a high performance 20-pin 12mm QFP package.

KGL4126FA B LOCK DIAGRAM

INB

IN

VB1 VB2 VS VC1

OUT

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Electronic Components

ODHKGL4126FA-03

KGL4126FA

ABSOLUTE MAXIMUM RATINGS

Parameter Symbol Min Max Unit Note

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

Current Source FET Gate Bias Voltage VC1 -6.5 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

VS-4.5

(Min. -6.5)

VS+2.0

(Max. 0.3)

VS+1.2

(Max. 0.3)

V

RECOMMENDED OPERATING CONDITIONS

Parameter Symbol Min Typ Max Unit Supply Voltage VS -5.46 -4.94 V DC Bias for Output Stage Amplifier X-Point Control Voltage VB1 VS+1.1 VS+1.5 V Current Source FET Gate Bias Voltage

: Single – Ended Operating Temperature at Package Base Ts 0 70 °C Input Interface AC coupled (External blocking capacitor is required) Output Interface AC coupled (External Bias-T is required for VD)

*1,2

VD 2.0 4.0 V

*1,3

VC1 VS VS+0.85 VS+1.0 V

Vin

0.25 1 Vpp Input Amplitude : Differential

0.5 1 Vpp

*1 Output amplitude can be tuned by control voltage VD. *2 VD is supplied at Output Port using External Bias-T. *3 It is recommended to set VC1 to a fixed value between VS+0.7V and VS+1.0V.

ELECTRICAL CHARACTERISTICS

Parameter Symbol Condition Min Typ Max Unit

Input Data Rate NRZ 10.7 Gbps

Supply Current of VS Iss X-Point : 45% - 55% 210 250 mA Supply Current of VD ID Supply DC Bias by Bias-T 90 130 mA Output Amplitude (Max) Vo (Max) 50 Ω load,(AC Coupled) 6.0 Vpp X-Point Control Xp NRZ, 50 Ω load 45 55 %

Output Rise/Fall Time Tr/T f Input Return Loss S11 100kHz–10 GHz 13 dB

50 Ω load 20%-80%

40 ps

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∼∼∼∼

y

∼∼∼∼

y

Electronic Components

ODHKGL4126FA-03

KGL4126FA

AC CHARACTERISTICS TEST CIRCUIT

Power Suppl

Fc=7.5GHz Bessel Filter

GND

(VD)

PULSE PATTERN GENERATOR

KGL4126FA

OSCILLO

-SCOPE

Bias-T

50Ω Transmission Line

Blocking Capacitor

VB1

VB2 VS VC1

0.1µF

50Ω Transmission Line

0.1µF

(VB1)

Power Suppl

(VS)

Power Suppl

(VC1)

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Electronic Components

ODHKGL4126FA-03

KGL4126FA

PACKAGE DIMENSIONS

20-0.3

15

16

12±0.2

20

KGL4126FA

1

JAPAN XXX

1

0.6

0.125

5.08

9.6

12±0.2

PIN CONNECTIONS

No. Symbol Note

1 GND Ground

16-1.27

11

5

(Top View)

10

6

8.6

0.5

1.5

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 Bi as Port 10 GND Ground 11 GND Ground

12 VC1 13 VS Supply Voltage Port

14 VB2 Input Termination Port 15 VB1 16 GND Ground

17 INB Inverted Input Port 18 GND Ground 19 IN Signal Input Port 20 GND Ground

Current Source FET Gate Bias Voltage

X-Point Control and Inverted Input Termination Port

11

2±0.3

(Unit: mm)

0.5

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p

Electronic Components

ODHKGL4126FA-03

KGL4126FA

TYPICAL OPERATING CHARACTERISTICS

Measured Condition Display Factor V : 1.0V/div, H : 20 ps/div, Offset : 0V

Input Signal

Tr/Tf(20-80%)≅36ps

10.7Gbps, NRZ , PN31, Diff erential 0.25Vpp, AC Coupled ( through 7.5GHz Bessel Filters )

Vd

PPG

KGL4126FA

Bias-T

Oscilloscope

Waveform @10.7Gbps Operate

Vs : -5.0V Is : 209.4mA Vb1 : -3.8 00V Crossing-Point : 50. 3% Vc1 : -4.0V Vd : 2.39V Id : 55.5mA Power : 1.180W Amplitude:

4.007Vpp

Tr : 28.4ps Tf : 27.6ps JitterP-P : 10.4ps

Vs : -5.0V Is : 209.4mA Vb1 : -3.785V Crossing-Point [%] : 50.6% Vc1 : -4.0V Vd : 3.04V Id : 72.3mA Power : 1.267W Amplitude:

5.009Vpp

Tr : 28.9ps Tf [ps] : 28.9ps JitterP-P : 10.2

s

Vs : -5.0V Is : 209.3mA Vb1 : -3.7 60V Crossing-Point : 49. 8% Vc1 : -4.0V Vd : 3.78V Id : 89.1mA Power : 1.383W Amplitude:

6.004Vpp

Tr : 30.2ps Tf : 31.6ps

-

Note Jitter(p-p) means “ 6 × Jitter(RMS) “.

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