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| Highlights |
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- 10 bit resolution
- 2.5 MHz sampling frequency
- 3.3 ± 10% count/fC input sensitivity
- ±3 fC input signals
- 40MHz/10-bit double output data
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The CAEN Model V791 is a 32-channel analog board designed for optimum performance as front-end electronics for the ICARUS experiment (see, for example, the web site: www.aquila.infn.it:80/icarus/). Its function is to digitize the signals coming from the detector and transmit them via a fast serial link. The V791 module can adapted to any detector which uses a charge (or current) preamplifier in Radeka configuration (folded cascode).
The 32 input signals are sent to 32 low-noise preamplifiers and relevant shapers. The processed signals are then multiplexed and digitized in order to be transmitted via the serial link.
The section for the signal digitization consists of four 8 channel blocks. Each block is made of two 4-channel analog multiplexers and a 20 MHz ADC. Each channel is sampled at a 2.5 Ms/s rate and digitized with a 10-bit resolution by using a time division multiplexing technique. The maximum delay between the sampling of a channel and the following one is 400 ns.
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| Resolution |
10 bits |
| Sampling frequency |
2.5 MHz |
| Input sensitivity |
3.3 ± 10% count/fC |
| Input signals |
±3 fC |
| Output data |
10-bit double data, 40MHz |
| Noise (RMS) |
< 2 LSB |
| S/N (charge) |
> 6 |
| Input range |
300 ± 10% fC |
| Test pulse input range |
± 2.5 Vpp |
| Sampling rate |
400 ns/channel |
| Preamp. Transconductance |
100 MOHM // 0.5 pF |
| Preamplifier time constant |
50 µs |
| First shaper time constant |
0.27 µs |
| First adder time constant |
1 µs |
| Second adder time constant |
1 µs |
| Adder sensitivity (DC) |
1 mV/count |
| Offset (count) |
± 10 (external setting) |
| Crosstalk (dB) |
< -40 dB |
| Code |
Description |
| WV791QAAAAAA |
V791Q - ICARUS 32 Ch. Analog Board (Charge) |
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| © 2000 - 2010 CAEN S.p.A. All rights reserved. |
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