The VASCM3.2 is a 128 channel low-noise/low power current sensitive preamplifier-filter circuit, with two-channel alternating sample and hold. The ASIC has switched current mode, correlated double sampling and dead time free readout. The integrated signals are read out by a serial multiplexer after S/H. The VA_SCM3.2 design is based on the existing VA_SCM2. Four gain settings with dynamic range: 1pC, 2.5pC, 6pC, and 20pC at 1.5V output voltage. Also, includes means for Correlated Double Sampling (CDS) and can be used in a separate operational mode.
|Detectors||Silicon, thin-film transistor (TFT) arrays|
|Application||Imaging, Spectroscopy, Calorimetry|
|Number of inputs||128|
|Input charge range||4 gain settings: ±1 pC, ±2.5 pC, ±6 pC and ±20 pC|
|Outputs||Multiplexed pulse height with CDS|
|Test and calibration||Internal calibration circuit|