Product Description
The Intel
LXT16865 is a high-gain
Transimpedance Amplifier (TIA) designed to
convert and amplify an optical signal into an
electrical signal for further processing.
Used in conjunction with a photodetector
and featuring a differential gain of 12k
,
the LXT16865 is intended for SONET/SDH
transmission systems at 9.953, 10.3, and
10.7Gbps data rates.
The Intel LXT16865 delivers the following
features:
output signal swing up to 2x200mV
input current overload: 2mApp
input DC current control circuit
automatic offset and output swing control
The LXT16865 requires a single power supply
+3.3V and dissipates less than 160mW,
allowing the customer to relax the power
budget of the optical receiver or module. The
TIA provides high optical input sensitivity (as
good as -20dBm) which makes it suitable for
long-haul transmissions. The LXT16865 is
designed in well-proven SiGe BiCMOS process
and is available as die.
The Intel LXT16865 is a four-stage TIA. A large
value transimpedance provides significant
output amplitude for the next device, even at
small input current. The output connection can
be either AC- or DC-coupled.
Intel
LXT16865
Transimpedance Amplifier (TIA)
product brief
The input stage is directly connected to the
photodiode anode to receive, amplify, and
convert a small photodiode current to a voltage
signal at line rates of up to 10.7Gbps. Second,
third, and fourth stages are intended to amplify
this voltage signal, transform it to a differential
signal, and arrange 50
output matching.
Because the input stage is single-ended and
the second and third stages are differential, an
on-chip circuit is used to control the offset level.
Key Applications
Telecommunication transmission systems
STM 64/OC-192
Dense Wavelength Division Multiplexing
(DWDM) applications
10.7Gbps Forward Error Correction (FEC)
and Optical Transport Network (OTN)
transmission
Metro and Long-Haul optical receiver
IN
VCCT
VOUTN
VCC4
VCC
VEE1
VOUT
VREF
VEE
DCCC
Offset
Control
DC
Current
Control
Band
Gap
Block Diagram
+
+
+
+
2 x
50
+
+
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2002 Intel Corporation
Order Number: 251137-001 0602/MG/DC/MG/2K
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Features Benefits
s
Low power dissipation 160mW
s
Relaxes total power budget
s
12k
differential gain
s
Provides high amplification stage and makes further
processing easier
s
-20dBm optical input sensitivity
s
Increases signal quality and transmission distance
s
Automatic output swing and offset control
s
Provides stable and high quality output eye
s
Up to 10.7Gbps speed
s
Suitable for FEC and OTN applications
Backplane
LMD/
LDD
TIA
O/E
O/E
LIA-CDR-DeMUX
MUX-CMU
Typical Application Diagram
Connector
LXT16726
LXT16727
LXT16865
LXT16864
LXT17012
MSA Module
Support Collateral
Item
Description
Order Number
LXT16865
Data Sheet
250694-001
LXD90865
Demo Board Data Sheet
Contact your local rep.
LXT16865
Test report
Contact your local rep.
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