ADN2880: 3.2 Gbps 3.3V Low No

ADN2880:  3.2 Gbps 3.3V Low Noise TIA for Small Form Factors

The ADN2880 is a compact, high performance 3.3 V power supply SiGe transimpedance amplifier (TIA) optimized for small form factor Metro-Access and Ethernet PIN/APD-TIA modules operating up to 3.2Gbps. It is a single chip solution for detecting photodiode current with a differential output voltage.

The ADN2880 features low input referred noise current of 400 nA enabling -24 dBm sensitivity; 2.1 GHz minimum BW enables up to 2.7 Gbps operation; +3.25 dBm nominal operation at 10 dB extinction ratio.

To facilitate assembly in small form factor packages such as a TO-CAN, the ADN2880 integrates a photodiode filter network on chip and features 20 kHz low frequency cutoff without any external components.

The ADN2880 operates with a 3.3 Volt power supply and is available in die form, with a chip area of less than 1 mm².

Applications

PIN/APD-TIA Receive Optical Sub-Assemblies

Up to 3.2Gbps LX4/GbE/FC Optical Receivers, Transceivers, Transponders

Features

• Technology: High Performance SiGe
• Bandwidth: 2.1 GHz minimum
• Input Noise Current Density: 8 pA/RtHz Optical sensitivity: -24 dBm
• Differential Trans-Impedance: 5000 V/A
• Power Dissipation: 75 mW

• Differential Output: 250 mV pk-pk
• Input Current Overload: +3.25 mA pk-pk
• On-chip PD filter: RF = 200 Ω CF = 20 pF
• Output Resistance: 50 Ω / side
• Die Size: 0.7 mm x 1.2 mm

Functional Block Diagram for ADN2880