MaxLinear Inc. announced a 64 GBd linear coherent transimpedance amplifier (TIA) for 400 and 600 Gbps dense wave division multiplexing (DWDM) coherent systems.

The MxL9162 is a dual-channel TIA with a per-channel data rate of 64 GBd. It provides over 40 GHz channel bandwidth and has low total harmonic distortion (THD), input referred noise density, power dissipation and channel crosstalk. The THD and channel signal-to-noise-ratio enable higher order signal modulation, such as 64-QAM, which is required to support 400 and 600 Gbps data rates on a single wavelength.

The MxL9162 exceeds the performance requirements of next-generation 64 GBd high bandwidth (HB) micro-intradyne coherent receiver (ICR) designs for long-haul, metro and data center interconnect applications. According to MaxLinear, the ultra-low input referred noise density and low power consumption make it the best option for next-generation HB micro-ICR designs.

An integrated photo detector (PD) bias, SPI interface and integrated high-resolution digital-to-analog and analog-to-digital converters simplify the peripheral circuit design, reducing module bill-of-material cost and minimizing the footprint.

The integrated equalizer function, with programmable gain peaking profile, allows receiver sensitivity to be optimized with PDs and package designs from a wide range of manufacturers. The MxL9162 also supports the low differential output swings required for the next generation of low power coherent DSPs.

The MxL9162 will begin sampling in the second quarter of 2017.

Bird Yuan, MaxLinear’s director of marketing for high speed interconnects, said, “Today, mainstream 32 GBd-based 100 Gbps/200 Gbps DWDM coherent systems bring a great balance of performance and cost to optical networks. For telecom and data center operators to further increase data capacity and to reduce cost-per-bit, coherent technology supporting higher bandwidth and a higher order of modulation is required.”

More information about the MxL9162 can be obtained by emailing MaxLinear at