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V775

32 Channel Multievent TDC (35÷300 ps)

Features

  • High channel density
  • 12 bit resolution
  • 5.7 µs / 32 ch conversion time
  • 600 ns fast clear time
  • Zero and overflow suppression for each channel
  • ±0.1% integral non linearity
  • ±1.5% differential non linearity
  • 32 event buffer memory
  • BLT32/MBLT64/CBLT32/CBLT64 data transfer
  • Multicast commands
  • Libraries, Demos (C and LabView) and Software tools for Windows and Linux

Overview

The CAEN Mod. V775 is a 1-unit wide VME 6U module housing 32 Time-to-Digital Conversion channels.
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 (5.7 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 board supports the live insertion that allows inserting or removing them into the crate without switching it off.

Technical Specifications

Packaging

1-unit wide 6U VME module (version AA requires the V430 backplane)

Inputs

32 ECL inputs, 110 Ω impedance

Full Scale Range

VME programmable from 140 to 1200 ns (if sliding Scale is used FSR is reduced from 4095 to 3840 counts)

Resolution

12 bit

LSB

VME programmable from 35 to 300 ps

RMS Noise

0.8 counts typical, 2 counts maximum

Integral non linearity

±0.1% of FSR (measured from 5% to 95% of 3840 counts)

Differential non linearity

±1% (measured from 5% to 95% of 3840 counts)

Interchannel Isolation

> 66 dB

Power rejection
  • 0.01 count/mV (+5V); 0.02 count/mV (-5V)
  • 0.005 count/mV (+12V); 0.001 count/mV (-12V)
Fast clear time

600 ns

Conversion time

5.7 µs for all channels

Minimum Start/Stop delay
  • Common Start mode: 14 ns
  • Common Stop mode: 4 ns
Zero suppression

Threshold values programmable in:

  • 16 ADC counts steps over the entire FSR
  • 2 ADC counts steps over 1/8 of FSR
GATE COMMON input

Two LEMO 00 bridged connectors, NIM signal, high impedance
Common Start/Stop signal

Control inputs

Active-high, differential ECL input signals:

  • RST: resets PEAK sections, MEB status and control registers
  • VETO: inhibits the conversion of the peaks
  • FCLR: FAST CLEAR of TAC sections
  • COM: Common Start/Stop signal
Control outputs

Differential ECL output signals:

  • DRDY: indicates the presence of data
  • BUSY: board full, resetting, converting or in MEMORY TEST mode
VME interface
  • A24/A32
  • Geographical Addressing
  • Multicast commands
  • D16/D32,BLT21/MBLT64,CBLT32/CBLT64

Compare

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Accessories

A954
Cable assembly 2.54mm 34 pin female to two 2.54mm 16 pin female - 50 cm

Ordering Options

Code Description
WV775XACAAAA V775AC - 32 Channel Multievent TDC (No JAUX No 12VDCDC, No live ins)   RoHS

Contacts

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