NT25L50 – 2.5 Gbps pure CMOS Transimpedance Amplifier for FTTh and Telecom Fiber Transceiver Applications

       
       
  Main Features   General Description
       
Typical -26 dBm sensitivity, +3 dBm overload at 2.5 Gbps when used with 0.9 A/W PIN (CPD = 0.45 pF, BER = 10-10 )  

The NT25L50 is a high sensitivity transimpedance amplifier (TIA) with automatic gain control (AGC) manufactured in a low cost pure CMOS process. The AGC enables over 30 dB of dynamic operating range, resulting in a high performance TIA designed for cost sensitive fiber optic applications such as GPON and OC-48 SONET.

The NT25L50 is pad compatible with the Mindspeed M02014 whilst offering superior performance and additional features. The NT25L50 can be used in new cost sensitive applications or as a drop-in replacement for existing TIAs in applications requiring cost reduction without major re-design effort.

Featuring data polarity invert, photodiode monitor and monitor invert functions as well as being designed to operate without the requirement for a VDD supply decoupling capacitor within the ROSA , the NT25L50 offers the most flexible, high performance receiver solution for cost sensitive 2.5 Gbps applications available.

     
Typical transimpedance: 6.0 kΩ  
     
Manufactured in low cost, pure CMOS process  
     
Single +3.3 V power supply  
     
Differential data outputs  
     
Internal regulated photodiode bias  
     
No internal ROSA VDD supply decoupling capacitor required for typical operation  
     
Photodiode current monitor output - can be programmed to Sink or Source  
     
Data polarity invert function  
     
Pad compatible drop-in replacement for Mindspeed M02014  
       
  Applications    
       

GPON, OC-48, 2xFC

   
       

APD Long Reach receivers

   
       
SFF, SFP, GBIC, 1x9 transceivers    
 
 
 

Block Diagram

   
 

Die

 
 

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Nanotech Semiconductor Ltd
2, West Point Court, Great Park Road
Bradley Stoke | Bristol BS32 4PY | England
Tel: +44-1454-462200 | Fax: +44-1454- 462201
www.nanosemi.co.uk