Transimpedance amplifier provides high sensitivity
Targeting the 100G optical networking market, Texas Instruments has introduced the company's first transimpedance amplifier (TIA). The ONET2804T provides high levels of sensitivity with negligible cross-talk and low input-referred noise of less than 2μA, offering stable and robust communication in hot-pluggable transceivers.
The ONET2804T is suitable for parallel optical interconnects in applications with data rates of up to 28Gbps, such as optical line cards, point-to-point microwave backhauls and video over fibre. The TIA's 750μm channel pitch reduces system complexity by allowing designers to wire bond directly to a photodiode. A two-wire I2C interface allows designers to optimise systems in order to drive high performance at low power consumption.
Operating over a temperature range from -40 to +100°C, the ONET2804T features 21GHz bandwidth, a gain of 10kΩ, a received signal strength indicator for each channel and a differential output amplitude of 450mVPP.
The TIA operates from a single 3.3 V supply and is available in die form.
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