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Phyworks has launched a transimpedance amplifier that enables lower-cost PIN photodiodes in the receive path of customer premises’ GPON applications to replace costly avalanche photodiodes (APDs).

With an intrinsic input referred noise level of just 85nA, the high-sensitivity PHY1096 transimpedance amplifier offers low-noise performance at 2.5Gbps and has been designed to meet GPON Class B+ requirements with sensitivity better than -30dBm when using a PIN photodiode.

The reduction in component cost, combined with the elimination of the high-voltage bias circuitry and lower yields associated with APDs, is expected to help increase FTTx GPON deployment.

The PHY1096 is based on a pure CMOS process that operates from a 3.3V power supply.

It integrates a transimpedance low-noise front-end amplifier, automatic gain control and a highly stable output stage.

An output is also provided that can be used to implement a signal-strength monitor circuit.

For ease of interfacing, this is designed to sink or source a current equal to the PIN photodiode current.

The PHY1096 is available in die form for mounting on a header to create a ROSA when combined with optics and a photodiode.

The operating temperature range is -40C to +85C.

The amplifier is priced at USD2.00 (GBP1.36) in volume.

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