  We describe the electronics and data acquisition system used in the first
phase of the PandaX experiment -- a 120 kg dual-phase liquid xenon dark matter
direct detection experiment in the China Jin-Ping Underground Laboratory. This
system utilized 180 channels of commercial flash ADC waveform digitizers. This
system achieved low trigger threshold ($<$1 keV electron-equivalent energy) and
low deadtime data acquistion during the entire experimental run.
