General Description
The MAX3665 low-power transimpedance preamplifier for 622Mbps SDH/SONET applications consumes only 70mW at VCC = 3.3V. Operating from a single +3.3V or +5.0V supply, it converts a small photodiode current to a measurable differential voltage. A DC cancellation circuit provides a true differential output swing over a wide range of input current levels, thus reducing pulse-width distortion. The differential outputs are back-terminated with 50Ω per side.

Features
♦ +3.3V or +5.0V Single-Supply Operation
♦ 55nARMS Input-Referred Noise
♦ 70mW Power Consumption at VCC = 3.3V
♦ 8kΩ Gain
♦ 450µA Peak Input Current
♦ 260ps (max) Deterministic Jitter
♦ Differential Output Drives 100Ω Load
♦ 470MHz Bandwidth

Applications
   SDH/SONET Receivers
   PIN Photodiode Preamplifiers and Receivers
   Regenerators for SDH/SONET