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Sony Semiconductor Electronic Components Datasheet

CXA1685M Datasheet

High-Speed Transimpedance Amplifier

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CXA1685M pdf
CXA1685M
High-Speed Transimpedance Amplifier
Description
CXA1685M is a low noise transimpedance
amplifier, particularly suitable for fiber-optic system.
CXA1685M is fabricated using high-speed bipolar
process.
8 pin SOP (Plastic)
Features
High transimpedance: Q 11.2k(Typ.)
Q 10.8k(Typ.)
Wide band width (–3dB): Q 177MHz (Typ.)
Q 157MHz (Typ.)
Maximum input current: 1mA
Low noise:
1.7pA/Hz (Typ.)
Applications
SONET/SDH: 155Mb/s
Fiber channel: 133Mb/s
FDDI:
125Mb/s
Absolute Maximum Ratings
Supply voltage
VCC – VEE –0.3 to +7.0 V
Minimum input voltage VIN
VEE V
Input current
IIN –1 to +1 mA
Output current
(Q/Q) (Continuous) IO
0 to 50 mA
(Surge)
0 to 100 mA
Storage temperature Tstg
–65 to +150 °C
Recommended Operating Conditions
DC power supply voltage
VCC – VEE 4.75 to 5.46 V
Operating ambient temperature
Ta 0 to +85 °C
Structure
Bipolar silicon monolithic IC
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
–1–
E94X22A8Y


Sony Semiconductor Electronic Components Datasheet

CXA1685M Datasheet

High-Speed Transimpedance Amplifier

No Preview Available !

CXA1685M pdf
Block Diagram and Pin Assignment
VCC 5
IN 6
C7
VEES 8
ZT
4 VCCA
3Q
2Q
1 VEEDA
CXA1685M
Electrical Characteristics
• DC Electrical Characteristics (VCC = VCCA = GND, VEES = VEEDA = –5.46 to –4.75V, Ta = 0 to +85°C)
Item Symbol Test Condition
Supply current
IEE input pin left open
Transimpedance
Q ZTQ
Q ZTQ
Max. Input Current before clipping IIN
Ta = 25°C
Max. Input Current
IIN2
IN VIN
Bias votlage
Q VQ
input pin left open
Q VQ
Input capacitance
C VC
CIN
Min. Typ. Max.
–15.3 –10.0
6.6 11.2 14.8
6.2 10.8 14.3
+40
+1000
VEE + 2.5
VEE + 1.7
VCC – 2.4
VEE + 1.7
1.3
Unit
mA
k
µA
V
pF
• AC Electrical Characteristics (VCC = VCCA = GND, VEES = VEEDA = –5.46 to –4.75V, Ta = 0 to +85°C)
Item
Symbol
Test Condition
Min. Typ.
Bandwidth
(–3dB)
Q f–3dBQ 1
Q f–3dBQ
113 177
109 157
Input Current Noise Spectral
Density (Mean value)
In
fN = 1kHZ to 156MHZ
1.7
1 Assumes photodiode capacitance; CPD < 1.0pF, output load capacitance; Cout = 2.0pF,
output load resistor; Q: 620to VEE, Q: 1.3kto VEE
Max.
Unit.
MHZ
pA/HZ
–2–


Part Number CXA1685M
Description High-Speed Transimpedance Amplifier
Maker Sony Corporation
Total Page 8 Pages
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