Description du Produit
Functions : 40 Gbps 800 mVpp Duobinary Coder
The VWA 50029 AA chip is a duobinary coder for high data rate application typically 10 to 25 (tbc) Gb/s. The chip is designed in 0.18μm SiGe BiCMOS 150 GHz process.
The device has two high frequency differential inputs (NRZ_in and Clock) and one differential high frequency output (Duobinary_Out). The chip is 50Ω single ended and 100Ω differential in and out. The chip can be used single in and out.
The input data stream is synchronized by the input clock and electrically coded to the duobinary format. The output is a 3 level signal: a logical NRZ “0” input always gives an analog “0V” output as a logical “1” input gives alternatively either “+V” or “-V” depending on the previous “1” state.
The different parts of the chip are internally biased using a voltage and currents reference circuit (Bandgap); in order to have the overall RF characteristics of the chip insensitive to the voltage supply the temperature and the process spread. An enable input control pin is used to switch the chip ON or OFF.
Three separate pins are used to bias the chip: one dedicated to the reference circuit the second for the coder core (input buffers and coder core) and the last for the 50Ω output driver. The 3 bias inputs can be separately filtered / decoupled in order to optimize the overall chip performances.
- SiGe BiCMOS – Ft = 150GHz
- Data rate up to 25Gb/s
- 3 V / 480 mW typical bias @ 27°C
- Single or differential input / output
- Input amplitude (data and clock): 300mV pp
- Output amplitude: 800mV pp diff (400mV on each 50Ω output)
- Temperature compensated
- ON and OFF state through an enable pin control
- Duobinary TX
- Fiber transmission