TGA4872

32 Gb/s Dual Linear Transimpedance Amplifier with AGC

Qorvo's TGA4872 is a dual channel fully differential state of the art TIA with integrated AGC designed for coherent DP-QPSK receivers with baud rates up to 128Gbps. 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 TGA4872 has compensating circuits that allow it to handle large DC input currents as well as large offsets between these currents. This is important for colorless applications. The TGA4872 is manufactured in a reliable highspeed SiGe process that combines excellent performance together with cost-effectiveness.

Discontinued
i
End of Life announced October 17, 2019 (PCN 19-0183).
Last Time Buy: April 28, 2020
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Key Features

  • Dual channel fully differential transimpedance amplifier
  • Excellent linearity and low total harmonic distortion
  • Able to handle large DC input currents
  • Adjustable bandwidth and amplitude frequency response
  • Large dynamic range
  • Manual gain control or AGC modes of operation
  • Adjustable output voltage range in AGC mode
  • Multiple amplifier stages to achieve high gain
  • Output shutdown function
  • Input and output signal level detection
  • Compliant with OIF micro-intradyne coherent receiver IA

Typical Applications

  • 100 Gb/s DP-QPSK (Dual Polarization QPSK)
  • 100 Gb/s Linear Driver: DP-QPSK
  • Coherent systems with a baud rate of up to 128 Gbps
  • TIA with AGC for long-haul or metro optical receiver modules

Parameters

Bandwidth (GHz)
30
Differential Transimpedance Gain (ohm)
100 to 7,500
Differential Output Vpp (mV)
200 to 900
Equivalent Input Noise (pA/rtHz)
20
Voltage (V)
3.3
Current (mA)
186
RoHS
Yes
Lead Free
Yes
Halogen Free
Yes
ITAR Restricted
No

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