Triquint offers new RFICs for CATV, FTTH and RFoG systems

TriQuint Semiconductor, Inc. (NASDAQ: TQNT) has made three additions to its family of TriAccess line amplifiers designed to replace multiple devices in CATV/FTTH systems.

TriQuint Semiconductor, Inc. (NASDAQ: TQNT) has made three additions to its family of TriAccess line amplifiers designed to replace multiple devices in CATV/FTTH systems.

The gallium arsenide (GaAs) devices are designed to operate on lower supply currents than comparable options. All three products have been used successfully in “numerous system deployments worldwide,” Triquint sources say.

The new RFICs include the TAT6254B, the TAT7457, and the TAT8857.

The TAT6254B is touted as an ultra low noise, high gain TriAccess amplifier for networks requiring highly sensitive optical input levels. Triquint says the TAT6254B, with 100-120 mA current consumption, has been demonstrated to offer sensitivity levels superior to existing market alternatives that in many cases are well below its specified -12 dBm optical input rating. The device will benefit multiple forms of deployment including QAM-dominated networks and high optical system link budgets.

The TAT6254B integrates two low noise/high gain trans-impedance amplifiers in a differential configuration followed by an output amplifier. It provides 3 pA/rtHz equivalent input noise (EIN) while offering up to 38 dB gain. It can be used for single system amplifier/receiver applications where noise optimization is critical, including all-QAM/all-digital FTTH/RF over Glass (RFoG) systems.

The new TAT7457 is a low supply current, highly-flexible, single-ended amplifier designed to satisfy a wider range of system requirements than competing options. The TAT7457 is particularly well suited for subscriber premises applications including Ethernet over Coax (EoC) and optical network unit (ONU) systems, in addition to a variety of existing and emerging premises (home) amplifier designs, Triquint asserts.

The TAT7457 nominally provides 19 dB gain; through an off-chip feedback resistor it can also deliver variable gain adjustment, trading off the 120 mA (at 5 V) typical current. This ability makes it suitable for home network amplification requirements, Triquint says. The new product offers higher gain, lower noise, and better return loss compared to 16 dB amplifiers traditionally used in home network applications, the company asserts.

The TAT8857 is designed to be used as a ‘doubler’ in typical 75 Ohm line amplifier systems where it reduces power consumption 20% compared to existing MMIC offerings in standard 24-V operation, Triquint says. The TAT8857 is designed for distribution node applications from 40-1002 MHz; it can also be operated on 12 V for optimal efficiency. The TAT8857 uses on-chip linearized, integrated pHEMT and MESFET technology to provide low distortion and configurable gain from 21-27 dB.

The TAT8857 is suited for manufacturers building CATV infrastructure equipment including line amplifiers and in distribution nodes where low current consumption and high performance is especially desirable. The device offers better optimized Third Order Distortion performance compared to legacy approaches, Triquint says, and comes in a standard SOIC-16 package. TAT8857 samples and evaluation boards are now available.

Samples and evaluation boards are available for TAT6254B & TAT7457, which are in full production, and the TAT8857, which will enter production in mid-2011.

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