ADN2891ACPZ-RL

ADN2891ACPZ-RL FEATURES

Input sensitivity: 4 mV p-p80 ps rise/fall timesCML outputs: 700 mV p-p differentialProgrammable LOS detector: 3.5 mV to 35 mVRx signal strength indicator (RSSI)SFF-8472-compliant average power measurementSingle-supply operation: 3.3 VLow power dissipation: 145 mWAvailable in space-saving 3 mm × 3 mm, 16-lead LFCSPExtended temperature range: −40°C to +95°CSFP reference design available

ADN2891ACPZ-RL GENERAL DESCRIPTION

The ADN2891 is a 3.2 Gbps limiting amplifier with integratedloss-of-signal (LOS) detection circuitry and a received signalstrength indicator (RSSI). This part is optimized for SONET,Gigabit Ethernet (GbE), and Fibre Channel optoelectronicconversion applications. The ADN2891 has a differential inputsensitivity of 4 mV p-p and accepts up to a 2.0 V p-p differentialinput overload voltage. The ADN2891 supports current modelogic (CML) outputs with controlled rise and fall times.By monitoring the bias current through a photodiode, the on-chip RSSI detector measures the average power received with2% typical linearity over the entire valid input range of thephotodiode. The on-chip RSSI detector facilitates SFF-8472-compliant optical transceivers by eliminating the need forexternal RSSI detector circuitry.Additional features include a programmable loss-of-signal(LOS) detector and output squelch.The ADN2891 is available in a 3 mm × 3 mm, 16-lead LFCSP.

ADN2891ACPZ-RL APPLICATIONS

SFP/SFF/GBIC optical transceiversOC-3/OC-12/OC-48, GbE, Fibre Channel (FC) receivers10GBASE-LX4 transceiversWDM transponders