TZA3026 - NXP

TZA3026 SDH/SONET STM4/OC12 transimpedance amplifer

The TZA3026 is a transimpedance amplifier with Automatic Gain Control (AGC), designed to be used in STM4/OC12 fiber optic links. It amplifies the current generated by a photo detector (PIN diode or avalanche photodiode) and converts it to a differential output voltage. It offers a current mirror of average photo current for RSSI monitoring to be used in SFF8472.

Features

s s s s s s s s s s Low equivalent input noise current, typically 67 nA (RMS) Wide dynamic range, typically 0.85 µA to 1.5 mA (p-p) Differential transimpedance of 14 kΩ (typical) Bandwidth from DC to 650 MHz (typical) Differential outputs On-chip AGC with possibility of external control Single supply voltage 3.3 V, range 2.9 V to 3.6 V Bias voltage for PIN diode Current output of average photo current for RSSI monitoring Identical ports available on both sides of die for easy bond layout and RF polarity selection 3. Applications s Digital fiber optic receiver modules in telecommunications tran.