The ADN2892 device supports operation from 1Gbps to 4.25 Gbps. The ADN2890 and
ADN2891 are optimised for SONET applications and have a minimum input data rate
of 155 Mbps, (maximum 2.7 Gbps). Testing the device outside this frequency
range, means that we cannot guarantee the correct operation of this device
according to the datasheet specifications.