/ Modular nuclear electronics / Amplitude-to-digital converters ADC

INTERFACE OF BUS PCI WILKINSON’ S CONVERSION METHOD BASIC CONFIGURATIONS Type Number of inputs   Number of converters Resolution (number of channels) Connectors Type Purpose ADC-1K-W1 (foto) 1 1 1K - 4K   BNC Analogue input DB9 Logical inputs, +12 V output ADC-1K-W2 (foto) 2 2 1K - 4K DB9 (two items) Analogue and logical inputs, +12 V output ADC-8K-W1 (foto) 1 1 2K - 8K BNC Analogue input DB9 Logical inputs, +12 V output ADC-8K-W2 (foto) 2 2 2K - 8K BNC (two items) Analogue inputs DB15 Logical inputs ADC-1K-W8 (foto) 8 1 1K DB19 Analogue inputs DB9 Logical inhibit inputs - The number of spectra stored in the memory is equal to the number of inputs. - Detector units can be connected to the ADC-1K-W1/2 and ADC-8K-W1 through the DB9 connectors (analogue signals are received and +12 V power is put out through these connectors). BASIC DATA Conversion method Wilkinson’ s Conversion clock frequency 100 MHz Analogue input signal Polarity Positive Amplitude 50 mV - 10 V Rise time > 0.25 µs Decay time < 100 µs Input resistance 2 k Ω Differencial nonlinearity (DNL) < 1 % Integral nonlinearity (INL) <0.04 % Software-adjusted channel widths with adjustment step 5 µV Channel width setting accuracy 5 % Temperature instability of channel width < 0.01 % Channel memory capacity 224-1 Real/live time setting accuracy 5 ms Lower-level discriminator threshold range 30 mV - 10 V (50 mV - 5 V for ADC-1K-W8) Upper-level discriminator threshold range 100 mV - 10 V “Ratemeter” input - logical signal with frequency up to 300 kHz + * “Inhibit” input with programmable polarity + Overall dimensions 180x110 mm * except ADC-1K-W8. RESOLUTION, CHANNEL WIDTH AND NONLINEARITY Type Channel width Resolution (of channels) Tipical values of nonlinearities INL DNL ADC-1K-W1/W2 10 mV - 2.5 mV 1K - 4K 0.01 % 0.4 - 0.7 % ADC-8K-W1/W2 5 mV - 1.25 mV 2K - 8K 0.01 % 0.5 - 0.8 % ADC-1K-W8 10 mV 1K 0.02 % 0.5 %

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