The ERM 588 is a 10 Gb/s PIN receiver with automatic gain control (AGC) for long-haul SONET/SDH, OC-192/STM-64, and DWDM applications. The receiver module integrates a PIN followed by a low-noise, high-gain transimpedance amplifier and secondary variable-gain amplifier. An integrated variable gain amplifier and a peak-level-detector circuit are provided for AGC operation. AGC is accomplished with an external circuit to monitor the peak-level-detector output and to feedback a voltage to the variable-gain amplifier, maintaining a constant RF output voltage level. If AGC is not required, the variable gain amplifier can be set to a fixed gain by tying the AGCS input to a DC voltage.

Key Features
_ Integrated AGC provides improved threshold control
_ High bandwidth
_ Large linear dynamic range
_ High gain output
_ Low dark-current, low-capacitance, InGaAs PIN chip
_ Coplanar package with single-mode 900 µm jacketed fiber pigtail

Applications
_ Long haul and metro-core
_ DWDM, SONET/SDH
_ Optical crossconnects