4335TA
43 Gbps TIA with Internal DCA Feedback Loop

Applications

• SONET OC-768 and SDH STM-256 equipment
• Short, intermediate, and long haul optical receiver modules.
• Broadband ATE

Features

• Supports data rates up to 43 Gbps
• Internal DCA feedback loop
• 3 dB BW of 50 GHz
• 520 Ω differential electrical gain
• Input-referred noise density 35 pA/rt Hz typ
• Low power consumption: < 250 mW max
• Adjustable DC offset control
• Min input sensitivity -9 dBm (ρ = 0.5 A/W, ER = 9.5 dB)
• Single +3.3 V power supply
• Available in die form

Description

The 4335TA transimpedance amplifier (TIA) is designed to support data rates up to 43 Gbps. This device is intended for use with PIN photodetectors and is capable of amplifiying input currents of up to 3 mA with low duty-cycle distortion.  The 4335TA includes an internal DC feedback amplifier circuit to control eye crossing level at the outputs over full input current range.  Output offset may be adjusted over a limited range with external voltage applied to the DCA pin.

The 4335TA provides 520Ω of differential gain, making it ideal for applications where intermediate optical amplification is present.  The 4335TA exhibits a typical minimum input sensitivity of –9 dBm while maintaining a BER of 10^–12.

The 4335TA operates off a single +3.3 V power supply and is available in die form.

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