TGA4861 Datasheet, PDF (1/1 Pages) TriQuint Semiconductor – 13 Gb/s Linear Transimpedance Amplifier with AGC

TGA4861
13 Gb/s Linear Transimpedance Amplifier with AGC
Applications
 40G DP-QPSK (Dual Polarization QPSK)
 TIA with AGC for long-haul or metro optical
receiver modules
 Coherent systems with a baud rate of up to
44.6Gbps
Product Features
 Excellent linearity and low total harmonic
distortion of <1% for Vout,se<350mVpp
 Able to handle large DC input currents
 Tunable frequency response of 8.5-13.5 GHz
 Large dynamic range of 26dB typical
 Manual gain or AGC mode selectable
 Multiple amplifier stages to achieve high gain
 Output shutdown function
 Peak level detection
 Input signal strength indicator (optional)
 Dual TIA die with +3.3V single supply voltage
 Compliant with OIF intradyne receiver MSA
 SiGe technology with ƒ_T/ƒ_max of 170/250 GHz
General Description
The TGA4861 is a state of the art TIA with
integrated AGC designed for coherent DP-QPSK
receivers with baud rates up to 44.6Gbps. It
features a very low total harmonic distortion
which is not only crucial for DP-QPSK, but also
enables higher-level QAM applications.
In addition, the TGA4861 features two
compensating circuits that allow it to handle
large DC input currents as well as large offsets
between these currents. This is, among others,
important for colorless applications.
1.4 x 1.6 mm² die
Block Diagram (one channel)
THD
The TGA4861 is manufactured in a reliable high-
speed SiGe process that combines excellent
performance together with cost-effectiveness.
The TGA4861 complies with the OIF intradyne
receiver MSA. The TGA4861 is a dual TIA and
thus contains two TIA/AGC circuits on each die.
In addition to the many features defined in the
OIF MSA, the TGA4861, for example, also
includes a versatile bandwidth tuning function.
THD vs. Input Current
Ordering Information
Part No.
TGA4861
ECCN
Description
EAR99
13Gb/s Transimpedance
Amplifier w/AGC
Product Summary: Rev - 1/17/2013
© 2013 TriQuint Semiconductor, Inc.
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Disclaimer: Subject to change without notice
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