1FEATURES
• 9 GHz Bandwidth
• 2.4 kΩ Differential Small Signal Transimpedance
• -20dBm Sensitivity
• 0.95 μARMS Input Referred Noise
• 2.5 mAPP Input Overload Current
• Received Signal Strength Indication (RSSI)
• 90 mW Typical Power Dissipation
• CML Data Outputs with On-Chip 50Ω
Back-Termination
• On Chip Supply Filter Capacitor
• Single 3.3 V Supply
• Die Size: 870 μm × 1036 μm

APPLICATIONS
• 10G Ethernet
• 8G and 10G Fibre Channel
• 10G EPON
• SONET OC-192
• 6G CPRI and OBSAI
• PIN Preamplifier Receivers
• APD Preamplifier Receivers

DESCRIPTION
The ONET8521T is a high-speed, limiting transimpedance amplifier used in optical receivers with data rates up
to 11.3Gbps. It features low input referred noise, 9GHz bandwidth, 2.4kΩ small signal transimpedance, and a
received signal strength indicator (RSSI).
The ONET8521T is available in die form, includes an on-chip VCC bypass capacitor and is optimized for
packaging in a TO can.
The ONET8521T requires a single 3.3V ±10% supply and its power efficient design typically dissipates less than
90mW. The device is characterized for operation from –40°C to 100°C case (IC back side) temperature.