The ADN2880 is a 3.3V, high gain SiGe transimpedance amplifier (TIA). The TIA converts the small signal current of photo detector into differential voltage output. The ADN2880 features 315 nA typical input-referred noise, enabling an optical sensitivity of -24.2dBm (0.85 A/W PIN). With bandwidth of 2.5GHz, ADN2880 allows data rate operation up to 3.2Gbps. Typical power dissipation is approximately 70mW.
To facilitate the assembly in small form factor packages, such as TO-46 headers, the ADN2880 provides an on-chip RC filter (200 ohms, 20 pF) and features 20kHz low frequency cutoff without using an external capacitor. An on-chip RSSI circuit, which generates voltage proportional to average photo-diode current, is also available for power monitoring and assembly alignment.
The ADN2880 is available in die form. With chip area of 1.2 mm x 0.7 mm, the TIA layout is specifically optimized for TO-Can-based packages.
- 2.5GHz bandwidth
- ?24.2dBm optical sensitivity
- 4400 V/A differential transimpedance
- 70mW power dissipation
- 260mV p-p differential output swing
- 4.3mAp-p input overload current
- On-chip RSSI function
- 20kHz low frequency cutoff
- 0.7 mm x 1.2 mm die size
- Applications:
- 3.2 Gbps or below optical receivers
- SONET/GbE/FC optical receivers
- SFF-8472-compliant receivers
- PIN/APD-TIA receive optical subassemblies (ROSA)
