V792N
16 Channel Multievent QDC
Features
- High channel density
- 12bit resolution
- 2.8 µs / 16 ch conversion time
- 600 ns fast clear time
- Zero and overflow suppression for each channel
- ±1.5% differential non linearity
- ±0.1% integral non linearity
- 32 event buffer memory
- BLT32/MBLT64/CBLT32/CBLT64 data transfer
- Multicast commands
- Live insertion
- Libraries, Demos (C and LabView) and Software tools for Windows and Linux
Overview
The CAEN Mod.V792N is a 1-unit wide VME 6U module housing 16 Charge-to-Digital Conversion channels with current integrating negative inputs (50 Ω impedance).
For each channel, the input charge is converted to a voltage level by a QAC (Charge to Amplitude Conversion) section. Input range is 0 ÷ 400 pC.
The Model V792N features LEMO 00 connectors for both input and control signals. The outputs of the QAC sections are multiplexed and subsequently converted by two fast 12-bit ADCs. The integral non linearity is ±0.1% of Full Scale Range (FSR) measured from 5% to 95% of FSR. The ADCs use a sliding scale technique to improve the differential non-linearity.
The Mod. V792N offers a 32 event buffer memory, A24/A32 addressing mode, D16, D32, BLT32/MBLT64 and CBLT32/CBLT64 data transfer mode. Multicast commands are also supported.
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 NA requires the V430 backplane)
- Inputs
16 channels, 50 Ω impedance, negative polarity, DC coupling
- Input range
0 ÷ 400 pC (if Sliding Scale is used FSR is reduced from 4095 to 3840 counts)
- Resolution
12 bit
- Gain
100 fC/count
- Max. tolerated positive voltage input
15 mV
- Reflections
< 5% with 2 ns fall time input signals
- Input offset
±2 mV
- RMS Noise
0.5 counts typical
- Integral non linearity
0.1% of FSR (=3840 counts)
from 5% to 95% of FSR
- Interchannel gain uniformity
±4%
- Interchannel Isolation
> 60 dB
- Power rejection
- 0.002 count/mV (+5V); 0.01 count/mV (-5V)
- 0.0046 count/mV (+12V); 0.0012 count/mV (-12V)
- Fast clear time
600 ns
- Gate timing
the Gate signal must precede the analog input by > 15 ns
- Conversion time
2.8 µs for all channels
- Zero suppression
Threshold values programmable in:
- 16 ADC counts steps over the entire FSR
- 2 ADC counts steps over 1/8 of FSR
- Control inputs
NIM input signals:
- GATE: temporal window for current integration
- RST: resets QAC sections, MEB status and control registers
- VETO: inhibits the conversion of the QAC signals
- FCLR: FAST CLEAR of QAC sections
- Control outputs
NIM 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,BLT32/MBLT64,CBLT32/CBLT64
Compare
Compare with QDCs.
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Accessories
- A992
- 16 Channel Impedance Adapter
Ordering Options
| Code | Description |
|---|---|
| WV792XNCAAAA | V792NC - 16 Channel Multievent Charge ADC (No JAUX, No 12V DCDC, live ins) RoHS |
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