KGA4121
1
10Gbps Transimpedance Amplifier IC
DESCRIPTION
December 1999
Oki's 10 Gbps transimpedance amplifier is fabricated 0.1µm gate length P-HEMTs for high-speed optical
communication. The IC has a large transimpedance, high sensitivity and a wide dynamic range.
FEATURES
♦
High Transimpedance
♦
Ultra-Broadband Amplifier
♦
Single -5V Power Supply
: 60dBΩ
: >8 GHz
♦
Wide Dynamic Range
♦
Ultra-Low Noise Current
: 18dB
: <10pA/
√
Hz(T.B.D)
FUNCTION DIAGRAM
IN
OUT
Vss
ABSOLUTE MAXIMUM RATINGS (Ta=25ºC)
Parameters
Supply Voltage
Input Current
Operating Temperature Range
Storage Temperature Range
Symbol
Vss
I
(IN)
Ta
Tst
Units
V
mA
ºC
ºC
Rating
-7
~
0
4
0
~
100
-40
~
125
RECOMMENDED OPERATING CONDITIONS (Ta=25ºC)
Parameters
Supply Voltage
Symbol
Vss
Units
V
Min.
-5.25
Typ.
-5
Max.
-4.75
ELECTRICAL CHARACTERISTICS (Ta=25ºC, Vss= -5V, C
(diode)
+C
(stray)
= 0.3pF)
Parameters
Transimpedance (<100 µA)
Bandwidth (-3dB)
Transimpedance Flatness (300kHz ~ 6GHz
)
Equivalent Input Noise Current
*1)
Optical Sensitivity
*2)
Optical Oveload
*2)
Input Resistance
Units
kΩ
GHz
dBΩ
pA/
√
Hz
dBm
dBm
Min.
8
-
Typ.
1.2
8.5
-
T.B.D
-19
-1
125
Max.
±1
Ω
Input Offset Voltage
V
-3.3
Output Return Loss (<10GHz)
dB
10
Power Consumption
W
0.36
Operating Temperature Range
*3)
ºC
0
+85
*1) Averaged Equivalent Input Noise Current from 130MHz to 7.5GHz.
*2) Value of optical sensitivity is guaranteed by design, assuming responsivity of photo diode of 0.8A/W.
*3) At backside die.
5
GTD-18221 Rev.3.0
OKI [ OKI ELECTRONIC COMPONETS ]
