ONET2804T 28-Gbps 4-channel limiting transimpedance amplifier |

This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
28-Gbps 4-channel limiting transimpedance amplifier

28-Gbps 4-channel limiting transimpedance amplifier - ONET2804T


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, an input referred noise of 1.8 µArms and a received signal strength indicator (RSSI) for each channel. 40 dB isolation between channels results in low crosstalk penalty in the receiver.

The part requires a single 3.3 V supply and typically dissipates 139 mW per channel with a differential output amplitude of 500 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:


  • 4-Channel Multi-Rate operation up to 28 Gbps
  • 10 kΩ Differential Transimpedance
  • 21 GHz Bandwidth
  • 1.8 µArms Input Referred Noise
  • 2.9 mAPP Input Overload Current
  • Programmable Output Voltage
  • Adjustable Gain and Bandwidth
  • Received Signal Strength Indicator (RSSI) for each Channel
  • 40 dB Isolation Between Channels (Die only)
  • Single 3.3 V Supply
  • 139 mW per Channel
  • 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

All trademarks are the property of their respective owners.


Compare all products in Optical networking ICs Email Download to Excel
Part number Order Device type Data rate (Max) (Gbps) VCC (V) ICC (Typ) (mA) ICC (Max) (mA) DJ (Typ) (ps) Operating temperature range (C)
ONET2804T Order now Transimpedance and limiting amplifier     28     3.3         2     -40 to 100    
ONET2804TLP Samples not available Transimpedance and limiting amplifier     28     3.3     30     36     2     -40 to 100