1349TA
11.3 Gbps Integrated Linear TIA w/ AGC (Butterfly Padout)

Applications

• SONET OC-192 and SDH STM-64 transponders
• Optical receivers with Electronic Dispersion Compensation
• Broadband instrumentation

Features

• Supports data rates up to 11.3 Gbps
• Differential electrical gain: 200 Ω to 7.0 kΩ
• Differential output: 400 mVpp
• Input sensitivity: -18 dBm (ρ = 0.85 A/W, ER = 9 dB)
• Less than 5 % harmonic distortion in linear mode
• Integrated eye-cross control loop
• Low power consumption: 200 mW
• Input overload current: 2.5 mApp
• Footprints for butterfly module applications
• Automatic or externally adjustable gain control
• Available in die form (980 μm x 1100 μm)

Description

The 1349TA is an integrated transimpedance amplifier and automatic gain control amplifier (TIA / AGC).  It is designed for optical links using electronic dispersion compensation techniques that require a linear receiver.  The 1349TA supports data rates up to 11.3 Gbps and can amplify input currents between 20 μA and 2.5 mApp, with less than 5% harmonic distortion.  Typical input sensitivity is -18 dBm with a BER of 10^–12.

In AGC mode, the 1349TA gain is set internally through a peak detector.  In external gain control mode, the voltage applied at a control pad determines the gain.

The 1349TA includes an integrated feedback circuit that controls the DC offset to maintain 50% eye crossing.  In addition, the eye crossing can be externally adjusted through an offset pad, DCA.

The 1349TA has a small-signal bandwidth greater than 8 GHz and an output return loss of greater than 8 dB, up to 12 GHz.

The 1349TA is designed for use in butterfly receivers.  It utilizes through-wafer vias, eliminating the parasitic inductance associated with ground wire bonds.  It operates from a single 3.3 V power supply and is available in die form.

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