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8 Channel Dual Range Multievent QDC |
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| Highlights |
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- Two simultaneous ranges: 0 ÷ 900 pC / 0÷100 pC
- 12 bit resolution with 15 bit dynamics
- 25 fC LSB on low range, 200 fC LSB on high range
- 2.8 µs / 8 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
- Live insertion
- Libraries, Demos (C and LabView) and Software tools for Windows and Linux
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Overview |
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The Mod. V965A is a 1-unit wide VME 6U module housing 8 Charge-to-Digital Conversion channels with current integrating negative inputs (50 Ohm impedance). For each channel, the input charge is converted to a voltage level by a QAC (Charge to Amplitude Conversion) section. Each QAC output is then converted by two ADCs in parallel; one ADC is preceded by a x1 gain stage, the other by a x8 gain stage: a dual input range is then featured: 0 ÷ 900 pC (200 fC LSB) and 0 ÷ 100 pC (25 fC LSB); this allows to avoid saturation with big charge pulses while increasing resolution with small ones.
The outputs of the QAC sections are multiplexed and subsequently converted by two fast 12-bit ADCs. The ADCs use a sliding scale technique to improve the differential non-linearity. Programmable zero suppression, multi-event buffer memory, trigger counter and test features complete the flexibility of the unit.
The module works in A24/A32 addressing mode; the data transfer occurs in D16/D32/BLT32/MBLT64. The module also supports the chained block transfer (CBLT32/CBLT64) and the multicast commands.
The board supports the live insertion that allows inserting or removing it into the crate without switching it off.
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| © 2000 - 2010 CAEN S.p.A. All rights reserved. |
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