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720 Digitizer Family

8/4/2 Channel 12-bit 250 MS/s Digitizer
The 720 is a family of 12-bit and 250 MS/s Flash ADC Waveform Digitizers with 2 Vpp of input dynamic range and DC offset adjustment. It is available in three form factors: VME (8 input channels), NIM (4 or 2 input channels) and Desktop (4 or 2 input channels). Considering the sampling frequency and the bit number, these digitizers are well suited for mid-fast signals as the ones coming from liquid or inorganic scintillators coupled to PMTs or Silicon Photomultipliers. The acquisition capabilities take advantage of the multi-buffer organization of the channel memory (divisible into a maximum of 1024 buffers). The data stream is continuously written in a circular memory buffer. When the trigger occurs, the digitizer writes further samples for the post trigger and freezes the buffer that can be read by one of the provided readout links. The acquisition can continue without any dead time in a new buffer.

Two memory sizes are available according to the different versions of the x720 model: 1.25 MS/ch or 10 MS/ch. The on-board FPGAs can run default firmware for waveform recording (including 'Zero suppression' and 'data reduction' methods that allow substantial savings in data amount readout and processing) as well as Digital Pulse Processing algorithms (DPP) making the digitizer an enhanced system for Physics applications. In addition to the existing firmware selection, CAEN is willing to collaborate with customers for developing custom solutions.

A common acquisition trigger signal can be provided externally, via front panel digital input connector, or via software. Alternatively, each channel can generate a trigger request when the input pulse goes under/over a programmable threshold; the trigger requests can be used either locally by the channel (independent triggering with DPP firmware) or processed by the board to generate a common trigger causing all the enable channels to acquire an event simultaneously (default firmware). The trigger from one board can be provided out on a front panel digital output connector.

720 family supports multi-board synchronization making a multi-board system where all ADCs result to be synchronized to a common clock source, and ensuring Trigger Time Tag alignment. Once synchronized,all data will be aligned and coherent across multiple x720 boards.

Refer to the following links for specific information on the different form factors: V1720, VX1720, DT5720, N6720.

CAEN Digitizers can be operated as pure waveform recorders or can run special algorithms to process the digitized pulses and extract a set of significant information like energy, pulse shape and precise timing.Each acquisition mode makes use of a specific firmware and software to tailor the digitizer capabilities to the user's needs.
GENERAL Form Factor
1-unit wide, 6U VME64/VME64X
1-unit wide NIM
154x50x164 mm3 (WxHxD) Desktop
ANALOG INPUT


Channels
8 channels
single ended / differential (VME)
4 or 2 channels
single ended (NIM, Desktop)

Impedance
50 Ohm single ended
100 Ohm differential
Connector
MCX single ended
AMP MODU II differential



Full Scale Range
2 Vpp
Bandwidth
125 MHz




Offset
Programmable DAC for DC offset adj.
Range: ± 1 V
DIGITAL CONVERSION


Resolution
12 bits
Sampling Rate
31.25 to 250 MS/s
symultaneously on each channel
ADC CLOCK GENERATION Clock source: internal/external
On-board PLL provides ADC sampling clock generation from an internal (50 MHz loc. oscillator) or external (front panel CLK-IN connector) reference
TRIGGER


Trigger Source
Self-trigger: channel over/under threshold for either Common or Individual (DPP only) trigger generation
External-trigger: Common by TRG-IN or individual by LVDS connectors (VME and DPP only)
Software-trigger: Common by software command
Trigger Propagation
TRG-OUT (VME) / GPO (NIM, Desktop) digital oputput

Trigger Time Stamp
Standard Firmware: 31-bit counter, 16 ns resolution, 17 s range
DPP-CI/PSD FW: 32-bit counter, 4 ns resolution, (17 s range), expandable to 64-bit
MEMORY 1.25 MS/ch or 10 MS/ch
Multi-Event Buffer with independent read and write access divisible into 1 ÷ 1024 buffers
Programmable event size and pre-post trigger
SYNCHRONIZATION


Clock Propagation
Daisy chain (VME only) through CLK-IN/CLK-OUT connectors
One-to-many clock distribution from
an external clock source
Clock Cable delay compensation
Acquisition Synchronization
Sync Start/Stop through digital I/O (S-IN, TRG-IN or GPI input, TRG-OUT or GPO output)
External Trigger Time Stamp reset
LVDS I/O (VME only) 16 general purpose LVDS I/Os controlled by FPGA
Busy, Data Ready, Memory Full, Individual Trg-Out and other functions can be programmed
An Input Pattern from the LVDS I/Os can be associated to each trigger as an event marker
ANALOG MONITOR
(VME only)
12-bit/100 MHz DAC FPGA controlled outup with four operating modes:
Trigger Majority / Test Pulses / Memory Occupancy / Voltage Level
COMMUNICATION INTERFACE


Optical Link
CAEN CONET proprietary protocol,
up to 80 MB/s transfer rate
Daisy chainable: it is possible to
connect up to 8/32 ADC modules to a
single Optical Link Controller (Mod.A2818/A3818)
USB (NIM and Desktop direct, VME via V1718 bridge)
USB 2.0 compliant
Transfer rate up to 30 MB/s

VME
VME 64X compliant
Data transfer mode: BLT32, MBLT64 (70 MB/s using CAEN Bridge), CBLT32/64, 2eVME, 2eSST (up to 200 MB/s)
POWER CONSUMPTIONS
Desktop
1.5 A @ 12 V (Typ.)
NIM
2.9 A @ +6 V
90 mA @ -6 V
VME
4 A @ +5 V
200 mA @ +12 V
200 mA @ -12 V
Code Description
WV1720BXAAAA OBSOLETED | V1720B - 8 Ch. 12 bit 250 MS/s Digitizer: 10MS/ch, C4, SE
WV1720CXAAAA OBSOLETED | V1720C - 8 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C4, DIFF
WV1720DXAAAA OBSOLETED | V1720D - 8 Ch. 12 bit 250 MS/s Digitizer: 10MS/ch, C4, DIFF
WV1720EXAAAA V1720E - 8 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C20, SE
WV1720FXAAAA OBSOLETED | V1720F - 8 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C20, DIFF
WV1720GXAAAA V1720G - 8 Ch. 12 bit 250 MS/s Digitizer: 10MS/ch, C20, SE
WV1720XAAAAA OBSOLETED | V1720 - 8 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C4, SE
WVX1720BXAAA OBSOLETED | VX1720B - 8 Ch. 12 bit 250 MS/s Digitizer: 10MS/ch, C4, SE
WVX1720CXAAA OBSOLETED | VX1720C - 8 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C4, DIFF
WVX1720DXAAA OBSOLETED | VX1720D - 8 Ch. 12 bit 250 MS/s Digitizer: 10MS/ch, C4, DIFF
WVX1720EXAAA VX1720E - 8 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C20, SE
WVX1720FXAAA OBSOLETED | VX1720F - 8 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C20, DIFF
WVX1720GXAAA VX1720G - 8 Ch. 12 bit 250 MS/s Digitizer: 10MS/ch, C20, SE
WVX1720XAAAA OBSOLETED | VX1720 - 8 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C4, SE
WDT5720AXAAA DISCONTINUED | DT5720A - 2 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C4, SE
WDT5720BXAAA DT5720B - 4 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C20, SE
WDT5720CXAAA DT5720C - 2 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C20, SE
WDT5720DXAAA DT5720D - 4 Ch. 12 bit 250 MS/s Digitizer: 10MS/ch, C20, SE
WDT5720EXAAA DT5720E - 2 Ch. 12 bit 250 MS/s Digitizer: 10MS/ch, C20, SE
WDT5720XAAAA OBSOLETED | DT5720 - 4 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C4, SE
WN6720AXAAAA OBSOLETED | N6720A - 2 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C4, SE
WN6720BXAAAA N6720B - 4 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C20, SE
WN6720CXAAAA N6720C - 2 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C20, SE
WN6720DXAAAA N6720D - 4 Ch. 12 bit 250 MS/s Digitizer: 10MS/ch, C20, SE
WN6720EXAAAA N6720E - 2 Ch. 12 bit 250 MS/s Digitizer: 10MS/ch, C20, SE
WN6720XAAAAA OBSOLETED | N6720 - 4 Ch. 12 bit 250 MS/s Digitizer: 1.25MS/ch, C4, SE
Model Package Function Description Compare
All - Reset
720 Digitizer Family Waveform Digitizers Digitizer Families 8/4/2 Channel 12-bit 250 MS/s Digitizer
724 Digitizer Family Waveform Digitizers Digitizer Families 8/4/2 Channel 14-bit 100 MS/s Digitizer
725 Digitizer Family Waveform Digitizers Digitizer Families 16/8 Channel 14-bit 250 MS/s Digitizer
730 Digitizer Family Waveform Digitizers Digitizer Families 16/8 Channel 14-bit 500 MS/s Digitizer
740 Digitizer Family Waveform Digitizers Digitizer Families 64/32 Channel 12-bit 62.5 MS/s Digitizer
742 Digitizer Family Waveform Digitizers Digitizer Families 32+2 / 16+1 Channel 12-bit 5 GS/s Switched Capacitor Digitizer
743 Digitizer Family Waveform Digitizers Digitizer Families 16/8 Channel 12-bit 3.2 GS/s Switched Capacitor Digitizer
751 Digitizer Family Waveform Digitizers Digitizer Families 8-4 / 4-2 Channel 10-bit 1-2 GS/s Digitizer
761 Digitizer Family Waveform Digitizers Digitizer Families 2/1 Channel 10-bit 4 GS/s Digitizer
Manuals Last Update
UM3051 - V1720 & VX1720 User Manual May 27th, 2017
UM3244 - DT5720 User Manual May 27th, 2017
UM3245 - N6720 User Manual May 27th, 2017
UM5961 - 720 Waveform Recording Firmware Registers September 12th, 2017

Precautions for Handling Storage and Installation

Application Notes Last Update
In this application note, we describe the capability of the Digitizer series x720 (12 bit, 250MS/s) to perform neutron-gamma discrimination based upon the digital pulse shape analysis. The digitizer runs the preliminary version of the DPP-PSD firmware for the digital charge integration and neutron-gamma discrimination. AN2506 - Digital Gamma Neutron discrimination with Liquid Scintillators 19 November, 2011
In this application note, Pulse Shape Discrimination between neutrons and gamma rays in liquid scintillators is studied by using DPP-PSD firmware running on CAEN digitizers. The dependence of the Figure of Merit on the digitizer sampling rate and resolution is experimentally determined. Based on "Pulse shape discrimination with fast digitizers", L. Stevanato et al, NIMA 748 (2014) 33-38, DOI: 10.1016/j.nima.2014.02.032 AN3250 - Pulse Shape Discrimination with different CAEN digitizers running DPP-PSD firmware 13 July 2014
Slide Presentations Last Update
SP5148 - Digital systems for Multi-Parametric analysis in Physics Applications (India - March 2016) March, 2016
Guides Last Update
This QuickStart Guide contains the basic information and guidelines that will let you use DeskBoot program in few steps. DeskBoot is a C-based software utility managing the boot of the firmware for CAEN's NIM and Desktop digitizers (including the DT5780 Digital Multi Channel Analyzer). GD2812 - DeskBoot QuickStart Guide 12 June, 2013
Catalog Last Update
2016-2017 Catalog Modular Pulse Processing Electronics / Waveform Digitizers CAEN Digitizers are platform independent instruments housing high speed (up to 5 GS/s) multichannel flash ADC, with local memory and FPGA for Digital Pulse Processing. Available in VME, NIM, Desktop. Up tp 14-bit resolution, 1 to 64 channels, programmable PLL, VME64X, Optical Link and USB 2.0 interfaces, Software Tools for Windows and Linux, Memory buffer: up to 57MS/ch (max. 1024 events), Firmware and Software for Digital Pulse Processing (DPP) and Waveform Recording 2016-2017 Product Catalog Section 03a - Modular Pulse Processing Electronics / Waveform Digitizers March 2016
Data Sheet Last Update
The 720 is a family of 12-bit, 250 MS/s Flash ADC Waveform Digitizers. It is available in three form factors: VME (8 input channels), NIM (4 or 2 input channels) and Desktop (4 or 2 input channels). x720 digitizers can run two Digital Pulse Processing firmware for Physics Applications: DPP-CI. DPP-PSD. DS3154 - 720 Digitizer Family (8/4/2 Channel 12-bit 250 MS/s Digitizer) Data Sheet 20 May, 2016

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