Development of ATLAS Liquid Argon Calorimeter Readout Electronics for the HL-LHC

The high-luminosity LHC will provide 5-7 times higher luminosites than the orignal design. An improved readout system of the ATLAS Liquid Argon Calorimeter is needed to readout the 182,500 calorimeter cells at 40-80 MHz with 16 bit dynamic range in these conditions. Low-noise, low-power, radiation-tolerant and high-bandwidth electronics components are being developed in 65 and 130 nm CMOS technologies. The design of the readout chain and the status of the R&D of the components will be presented.