Up to 62.5 MS/s digitizer

64-channel12-bitPCIe

The V1740 is a 1-unit wide VME 6U module housing a 64 Channel 12 bit 62.5 MS/s (65 MS/s using external clock) Flash ADC Waveform Digitizer and featuring 2 Vpp single ended input dynamics on two ERNI SMC connectors. Versions with 10 Vpp (single ended) input full scale range are also available (V1740A/V1740C). The DC offset adjustment (range ±1 V / 5 V) by programmable 16bit DACs (one for each 8-channel group) allows a right sampling of a bipolar (Vin = ±1 V / 5 V) up to a full positive (Vin = 0 ÷ +2 V / 10 V) or negative (vin = 0 ÷ -2 V / 10 V) analog input swing without losing dynamic resolution. The module features front panel Clock Input and Output as well as a PLL for clock synthesis from internal/external references. The data stream is continuously written in a circular memory buffer. When the trigger occurs, the FPGA writes further N samples for the post trigger and freezes the buffer that can be read either by VMEbus or Optical Link. The acquisition can continue without dead time in a new buffer. Each channel has a SRAM Multi-Event Buffer divisible into 1 ÷ 1024 buffers of programmable size. The readout (by VMEbus or Optical Link) of a frozen buffer is independent from the write operations in the active buffer (ADC data storage). Two sizes of the channel digital memory are available by ordering options: 192 kS/ch (mod. V1740/V1740C) and 1.5 MS/ch (mod. V1740A/V1740B). V1740 supports multi-board synchronization allowing all ADCs to be synchronized to a common clock source and ensuring Trigger time stamps alignment. Once synchronized, all data will be aligned and coherent across multiple V1740 boards.