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