28Gbps 4-Channel Limiting Transimpedance Amplifier - ONET2804T


28Gbps 4-Channel Limiting Transimpedance Amplifier


Special Note

To request an ONET2804T sample or full datasheet please enter the request here.


The ONET2804T is a high gain limiting transimpedance amplifier for parallel optical interconnects with data rates up to 28 Gbps. The device is used in conjunction with a 750 µm pitch photodiode array to convert an optical signal into a differential output voltage. An internal circuit provides the photodiode reverse bias voltage and senses the average photocurrent supplied to each photodiode.

The device can be used with pin control or a two-wire serial interface to allow control of the output amplitude, gain, bandwidth and input threshold.

The ONET2804T provides 21 GHz bandwidth, a gain of 10 kΩ, and a received signal strength indicator (RSSI) for each channel.

The part requires a single 3.3 V supply and provides a differential output amplitude of 450 mVPP. It is characterized for operation from –40°C to 100°C temperatures and is available in die form with a 750 µm channel pitch.

To request a full data sheet, please send an email to: onet2804t_request@ti.com


  • 4-Channel Multi-Rate operation up to 28 Gbps
  • 10 kΩ Differential Transimpedance
  • 21 GHz Bandwidth
  • Programmable Output Voltage
  • Adjustable Gain and Bandwidth
  • Received Signal Strength Indicator (RSSI) for
    each Channel
  • Single 3.3 V Supply
  • Pad Control or 2-Wire Control
  • On Chip Filter Capacitors
  • –40°C to 100°C Operation
  • Die Size: 3250 µm ×
    1450 µm, 750 µm Channel Pitch

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Parametrics Compare all products in Transimpedance and Limiting Amplifiers

DJ (Typ) (ps)
ICC (Nom) (mA)
ICC (Max) (mA)
Operating Temperature Range (C)
2    2   
3.3    3.3   
-40 to 100    -40 to 100   

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