  Gotthard-II is a charge-integrating microstrip detector developed for
experiments and diagnostics at free-electron lasers using hard X-rays of 5 keV
- 20 keV. Thanks to its excellent single photon sensitivity, large dynamic
range as well as high frame rate of 4.5 MHz in burst mode, its potential
scientific applications include X-ray absorption/emission spectroscopy, hard
X-ray high resolution single-shot spectrometry (HiREX), beam diagnostics, as
well as veto signal generation for pixel detectors. The Gotthard-II ASIC has
been designed and fabricated using UMC-110 nm technology. The final ASIC design
and performance in terms of noise, linearity, dynamic range, coupling between
channels and speed will be discussed in the paper. In addition, a first
measurement of an X-ray absorption spectrum of a standard copper sample has
been done. The performance of the Gotthard-II in an experiment using energy
dispersive X-rays has been demonstrated.
