V775N

Overview

The CAEN Mod. V775N is a 1-unit wide VME 6U module housing 16 Time-to-Digital Conversion channels on LEMO 00 connectors. The Full Scale Range can be selected via VME from 140 ns to 1.2 µs with 8 bit resolution. The board can operate both in COMMON START and in COMMON STOP mode. Each time interval between the COM signal and the input signal is converted into a voltage level by the TAC sections. The outputs of the TAC sections are multiplexed and subsequently converted by two fast ADC modules (2.8 µs conversion time).

The integral non linearity is ±0.1% of full scale range (FSR), measured from 2% to 97% of FSR; the differential non linearity is ±1.5% of FSR, measured from 3% to 100% of FSR. The ADCs use a sliding scale technique to reduce the differential non-linearity.
Programmable zero suppression, multievent buffer memory, trigger counter and test features complete the flexibility of the unit. The module works in A24/A32 ADDRESS mode. The data transfer occurs in D16, D32, BLT32 or MBLT64 mode. The unit supports also the Chained Block Transfer (CBLT32/CBLT64) and the Multicast commands. The boards support the live insertion that allows inserting or removing them into the crate without switching it off.