1Gbps to 4.25Gbps Multirate Transimpedance Amplifier with Photocurrent Monitor

The MAX3793 transimpedance amplifier provides a compact low-power solution for applications from 1Gbps up to 4.25Gbps.

The MAX3793 features 195nA input-referred noise, 3.5kΩ transimpedance gain, 2.9GHz bandwidth (CIN = 0.3pF) and 2.8mAP-P input overload. Operating from a +3.3V supply, the MAX3793 consumes only 106mW. An integrated filter resistor provides positive bias for the photodiode. These features, combined with a small die size, allow easy assembly into a TO-46 header with a photodiode. The MAX3793 also includes an average photocurrent monitor.

The MAX3793 has a typical optical sensitivity of -20dBm (0.55A/W) at 4.25Gbps. Typical optical overload is at 4dBm. The MAX3793 and the MAX3748A limiting amplifiers provide a complete solution for multirate receiver applications.

Applications

* Gigabit Ethernet Optical Receivers * Multirate Fibre Channel Optical Receivers * SFF/SFP Transceiver Modules from 1Gbps to 4.25Gbps

* 4.7psP-P Deterministic Jitter (DJ)

* 195nARMS Input-Referred Noise

* 2.9GHz Small-Signal Bandwidth

* 2.8mAP-P AC Overload

* Photocurrent Output Monitor

* 3.5kΩ Differential Gain

* Compact Die Size (30 mils x 50 mils)