Document type:
Title:
Revision date:
Revision:
User's Manual (MUT)
Mod. DT5740 32 Channel 12bit - 65MS/s Digitizer
04/05/2016
12
NPO:
Filename:
Number of pages:
Page:
00100/09:5740x.MUTx/12
DT5740_REV12.DOC
50
6
1
Introduction
This document contains the full hardware description of the DT5740 module, and the principle of
operating as Waveform Digitizer basing on the default firmware for the waveform recording
(hereafter called default firmware).
Referred firmware version: 4.10_0.11.
For any reference to registers in this user manual, please refer to the UM5483 - 740 Family
Waveform Recording Firmware Registers document, free downloadable at the digitizer web
page.
1.1
Overview
The DT5740 is a desktop
module housing a 32 Channel
12 bit 62.5 MS/s desktop
module housing a 32 Channel
(65 MS/s using external clock)
Flash ADC Waveform Digitizer
with 2 V
pp
dynamic range (10
V
pp
available in the version
DT5740C) on a single ended
ERNI SMC input connector.
16 channels are also available on MCX coaxial connectors, while the A746E Adapter is required
for all the 32 channels to be available on as many single-ended LEMO connectors (see § 2.5.1).
Because of the high channel density, provided by the AD9222 Octal 12-bit 65 MSPS Analog-to-
Digital Converter, most channel settings are performed over “groups” of 8 channels (one group
per ADC chip).
The DC offset is adjustable via a 16-bit DAC on each 8-channel group in the ±1 V (@ 2 V
pp
) or ±5 V
(@ 10 V
pp
) range.
The ADC resolution and the sampling frequency make this digitizer well suited for mid-slow
detection systems (e.g. inorganic scintillators coupled to PMTs, gaseous detectors).
Each 8-channel group has a SRAM Multi-Event Buffer divisible into 1 ÷ 1024 buffers of
programmable size.
DT5740D version (EP3C40 Altera FPGA) supports special Digital Pulse Processing firmware for
Charge to Digital conversion (DPP-QDC). A x740D module running DPP-QDC firmware becomes
multi-channel data acquisition systems for Nuclear Physics or other applications requiring
radiation detection.
A common acquisition trigger signal (common to all the channels) can be fed externally via the
front panel TRG-IN input connector or via software. Alternatively, in the default firmware, each
8-channel group can generate a trigger request when at least one of the channels goes
under/over a programmable threshold. The requests from the groups are processed by the
board to generate the common trigger causing all the channels to acquire an event
simultaneously (in the DPP firmware, each channel can trigger independently of the others upon
the pulse under/over-threshold; the trigger request is used locally by the channel to acquire the
event).
