DESCRIPTION
The TZA3000 optical receiver is a low-noise transimpedance amplifier with AGC plus a limiting amplifier designed to be used in SDH/SONET fibre optic links. The TZA3000 amplifies the current generated by a photo detector (PIN diode or avalanche photodiode) and converts it to a differential output voltage.

FEATURES
• Low equivalent input noise, typically 3.5 pA/√Hz
• Wide dynamic range, typically 1 µA to 1.5 mA
• On-chip low-pass filter. The bandwidth can be varied between 370 and 600 MHz using an external resistor. Default value is 470 MHz.
• Differential transimpedance of 1.8 MΩ
• On-chip AGC (Automatic Gain Control)
• PECL (Positive Emitter-Coupled Logic) or CML (Current-Mode Logic) compatible data outputs
• LOS (Loss-Of-Signal) detection
• LOS threshold level can be adjusted using a single external resistor
• On-chip DC offset compensation
• Single supply voltage from 3.0 to 5.5 V
• Bias voltage for PIN diode.

APPLICATIONS
• Digital fibre optic receiver in short, medium and long haul optical telecommunications transmission systems or in high speed data networks
• Wideband RF gain block.