V862

The Model V862 is a 1-unit wide VME 6U module housing 32 Charge-to-Digital Conversion channels with current integrating negative inputs. Each channel has an independent gate input (GATE i) logically ANDed with a COMMON GATE input; the input charge on the i-th channel is converted to a voltage level by a QAC (Charge to Amplitude Conversion) section when both the GATE i and COMMON GATE signal are active. Input range is 0 ÷ 400 pC.
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.
The outputs of the QAC sections are multiplexed and subsequently converted by two fast 12-bit ADCs (5.7 µs for 32 channels).
The Mod. V862 offers a 32 event buffer memory; programmable zero suppression and trigger counter complete the features of the unit. The module works in A24/A32 mode. The data transfer occurs in D16, D32, BLT32, MBLT64 or CBLT32/CBLT64 mode. The unit also supports the Multicast commands.
The board has a special circuitry that allows it to be removed from and inserted in a powered crate without switching the crate off.