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VME - V265
8 Channel Charge ADC Obsolete product 

Highlights
  • Dual range: 120 / 800 pC
  • 12 bit resolution with 15 bit dynamic range
  • 300 µs conversion time
  • Integral non linearity: ±7 counts (low range), ±2 counts (high range)

Products
Front End
VME
V265 - 8 Channel Charge ADC
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The Mod. V265 is a 1-unit wide VME 6U module with 8 charge integrating negative inputs (positive on request).
The unit is ideally suited for large detectors in applications like electromagnetic and hadronic calorimetry (phototubes, streamer tubes, etc.).
The GATE, CLR and BUSY signals are std. NIM levels (ECL on request). This unit implements an A24, D16 slave VME protocol.



Packaging 6U-high, 1U-wide VME module
Inputs 8 channels, DC coupling, 50 Ohm impedance
Full scale 120 pC (15 bit range)
800 pC (12 bit range)
Input range -1.5 V to +5 mV for linear response
Gain 31 count/pC (15 bit range)
4 count/pC (12 bit range)
Gain dispersion ±2 count/pC max
Integral non linearity ±7 counts (15 bit)
±2.5 counts (12 bit)
Input offset ±2 mV
Conversion time 300 µs / 8 ch
Fast clear time 200 ns
Gate timing the GATE must precede the analog input by >65 ns
Pedestal/GATE width 50 count/100 ns (15 bit)
7 count/100 ns (12 bit)
Residual pedestal for GATE width of 300 ns and high impedance source
50 count/100 ns (15 bit)
7 count/100 ns (12 bit)
Temperature coefficient 3 count/°C max
VME interface A24, D16

Description Last Update
v265_rev1.pdf 10.03.2003
Precautions_for_Handling_Storage.pdf 04.01.2008

Code Description
WV265JAAAAAA V265AE - 8 Channel Charge Integrating ADC (CIA) 50Ohm Negative - ECL 
WV265XAAAAAA V265AN - 8 Channel Charge Integrating ADC (CIA) 50Ohm Negative - NIM 
WV265XPAAAAA V265BN - 8 Channel Charge Integrating ADC (CIA) 50Ohm Positive - NIM 

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