OKI KGA4163, 4163 User Manual

Electronic Components

October 1, 2008

ODHKGA4163-02

KGA4163

10 Gbps Transimpedance Amplifier IC

GENERAL DESCRIPTION

Oki’s 10Gbps transimpedance amplifier is fabricated 0.1 m gate length P-HEMTs for high-speed optical
communication. The IC has high sensitivity and overload performance.

FEATURES

 Transimpedance : 1.4kOhm (Differential)
 Sensitvity : -20.5dBm
 Overload : +2dBm
 Chip Size : 0.80×1.09mm2
 +3.3V Single Power Supply

ABSOLUTE MAXIMUM RATINGS (Ta = 25°C)

Parameters Symbol Units Rating
Supply Voltage V
Input Current I(IN) mA +4
Storage Temperature Range TST °C –40 to +125

RECOMMENDED OPERATING CONDITIONS

Parameters Symbol Units Min. Typ. Max.
Supply Voltage Vd V +3.05 +3.30 +3.55
Operating Temperature Range *1)

*1) At backside of die.

Ts °C -10 — +90

V 0 to +4

d

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KGA4163

ELECTRICAL CHARACTERISTICS

(Ta= 25°C, Vd= +3.30V, C(diode)  0.15pF, unless otherwise noted )

Parameters Units Min. Typ. Max.
Transimpedance (Differential Output, I
Transimpedance (Single Ended Output, I
Maximum Single Ended Output Swing mVpp 300 450 570
Small Signal Bandwidth (–3 dB) GHz 9.0 11.0 —
Optical Sensitivity *1)
Optical Overload *1)
Output Return Loss ( f < 10 GHz ) dB — — -10
Input Bias Voltage (I

= 0 mA) *2), *3)

(IN)

Supply Current *2)
Power Consumption *2)

*1) Measured at 10

ratio of transmitter of 13dB.
*2) Under the recommended operating conditions (-10°C < Ta < 90°C, 3.05V < Vd < 3.55V)
*3) The input bias voltage will increase in the value, according to the input current. At I

1.0V.

-12

BER with a 231-1 PRBS at 10Gbps, assuming responsivity of photo diode of 1.0 A/W and extinction

<50 µA)  750 1400 1900

(IN)

<50 µA)

(IN)

 375 700 950

dBm — -20.5 -19.8
dBm +1.0 +2.0 —

V +0.58 +0.75 +0.92

mA — 64 79

W — 0.20 0.28

= 2.5mA, the value is about

(IN)

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FREQUENCY RESPONSE (TYP.)

(Ta= 25°C, C(diode)  0.15 pF)

65

ODHKGA4163-02

KGA4163

Vd = 3.30V

Vd = 3.55V

60

55

Vd = 3.05V

50

Pin = -20dBm

45

OUTP
OUTN

Transim pedance [ dB]

40

0.13 20

0.5 1 5 10
Frequency [GHz]

OUTPUT VOLTAGE VS. INPUT CURRENT (TYP.)

(Ta= 25°C, Extinction ratio of optical input signal: 13dB)

600
500
400
300
200

Vd=3.05 V

100

Vd=3.30 V
Vd=3.55 V

Output Amplitude [mVpp]

0

0 0.5 1.0 1.5 2.0

Inpu t DC Current [mA]

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