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High channel density
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12 bit resolution
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2.8 µs / 16 ch conversion time
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600 ns fast clear time
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Zero and overflow suppression for each channel
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±1.5% differential non linearity
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±0.1% integral non linearity
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32 event buffer memory
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BLT32/MBLT64/CBLT32/CBLT64 data transfer
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Multicast commands
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Live insertion
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Libraries, Demos (C and LabView) and Software tools for Windows and Linux
The Mod. V785N is a 1-unit wide VME 6U module housing 16 Peak Sensing Analog-to-Digital Conversion channels. Each channel is able to detect and convert the peak value of the positive analog signals (with >50 ns risetime) fed to the relevant connectors. Input voltage range is 0 ÷ 4 V. The Mod. V785 N features LEMO 00 connectors for both input and control signals.
The outputs of the PEAK sections are multiplexed and subsequently converted by two fast 12-bit ADCs (2.8 µs for all channels).
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 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.
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Compare
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Image
|
Name
|
Package
|
No. of Inputs
|
Resolution (channels)
|
Conversion Time (µs)
|
Full Scale Range (V)
|
Multi Event Buffer size
|
Connectors
|
|
|
V1741 |
VME |
64 |
1k, 2k, 4k, 8k, 16k |
0.1 |
4 |
1024 events / ch |
ERNI SMC |
|
|
N6741 |
NIM |
32 |
1k, 2k, 4k, 8k, 16k |
0.1 |
4 |
1024 events / ch |
ERNI SMC |
|
|
V785N |
VME |
16 |
4k |
2.8 |
4 |
32 events / ch |
LEMO |
|
|
V1785 |
VME |
8 |
4k |
2.8 |
4 / 0.5 (Dual) |
32 events / ch |
LEMO |
|
|
V785 |
VME |
32 |
4k |
5.7 |
4/8 |
32 events / ch |
Std. Flat |
|
|
N957 |
NIM |
1 |
8k |
0.8 |
10 |
64k events / ch |
LEMO |
Technical Specifications
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Packaging |
1-unit wide 6U VME module |
|
Inputs |
16 channels, 1 kΩ impedance, positive polarity, DC coupling |
|
Resolution |
12 bit |
|
Full Scale Range |
4 V (if Sliding Scale is used FSR is reduced from 4095 to 3840 counts) |
|
Min. Detectable signal |
10 mV |
|
Min. Input rise time |
50 ns |
|
RMS Noise |
0.8 counts typical, 2 counts maximum |
|
Integral non Linearity |
0.1% of FSR (=3840 counts) |
|
Differential non linearity |
±1.5% from 3% to 100% of FSR (=3840 counts) measured with 1 µs rise time input signals |
|
Interchannel Isolation |
> 60 dB |
|
Power rejection |
0.007 count/mV (+5V); 0.02 count/mV (+12V); 0.003 count/mV (-12V) |
|
Max. Gate width |
1 ms |
|
Temperature Stability |
|
|
Fast clear time |
600 ns |
|
Conversion time |
2.8 µs for all channels |
|
Zero suppression |
Threshold values programmable in:
|
|
GATE input |
NIM signal, high impedance |
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Control inputs |
Standard NIM input signals:
|
|
Control outputs |
Standard NIM output signals:
|
|
VME interface |
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