Mircea Bogdan, NSS2007Oct. 27-Nov.3, 2007 – Honolulu, Hawaii 1

Custom 14-Bit, 125MHz ADC/Data Processing Module

for the KL Experiment at J-Parc

M. Bogdan, J. Ma, H. Sanders, Y. Wah

The University of Chicago

Mircea Bogdan, NSS2007Oct. 27-Nov.3, 2007 – Honolulu, Hawaii 2

Custom 14-Bit, 125MHz ADC DAQ - Block Diagram

Custom Boards: - 14-Bit ADC-125MHz, - 12-Bit FADC-500MHz, - Crate Traffic Control Module,- System Trigger Module.

• CsI DAQ up to 2,816 Ch 14Bit/125 MHz;• Veto DAQ up to 512 Ch 14Bit/125 MHz;• BHPV DAQ up to 100 Ch 12Bit/500 MHz.

DAQ designed for an International High Energy Physics Experiment (to study CP Violation) at the new Japanese Accelerator Complex.

Mircea Bogdan, NSS2007Oct. 27-Nov.3, 2007 – Honolulu, Hawaii 3

Custom 14-Bit, 125MHz ADC CsI Crate - Block Diagram

6U VME Crates; 16 ADC Boards/Crate; Local Processing; Continuous Readout; Simultaneous Sampling.

Mircea Bogdan, NSS2007Oct. 27-Nov.3, 2007 – Honolulu, Hawaii 4

Custom 14-Bit, 125MHz ADC Module Block Diagram

•Each ADC channel - one AD9254 chip: 14 bits/125MHz;•10-Pole Filter/Shaper Included on Board;•One STRATIX II FPGA EP2S60F1020 for 16 ADC channels:

•Trigger rate: 10kHz, 32 samples/trigger (256ns);•Input Pipeline: ~25us depth (3,200 samples);•Two VME readout buffers - max 128 triggers, (10 ms).

Mircea Bogdan, NSS2007Oct. 27-Nov.3, 2007 – Honolulu, Hawaii 5

Actual Module Schematic – DA/Mentor Graphics

LVDS Inputs:- 8-Bit Parallel;

LVDS Outputs:- 16-Bit Parallel;- 12-Bit Serialized;

Readout: VME32/64 with CBLT; GLINK/SLINK if needed.

Custom 14-Bit, 125MHz ADC Module Schematic – Top Level

Mircea Bogdan, NSS2007Oct. 27-Nov.3, 2007 – Honolulu, Hawaii 6

Custom 14-Bit, 125MHz ADC Analog Channel

Analog Channel Schematic

Filter/Shaper Simulation

Mircea Bogdan, NSS2007Oct. 27-Nov.3, 2007 – Honolulu, Hawaii 7

16 Channel, 14 bits, 125 MSPS ADC; 10 pole input filter – configurable; Powerful local processing with FPGA; Low cost, 6U VME64 with CBLT.

Built and tested 2 prototypes: Full-Scale Input ~ 250mV/50Ohm; Input noise ~ 35 uV RMS;

Custom 14-Bit, 125MHz ADC Hardware

Mircea Bogdan, NSS2007Oct. 27-Nov.3, 2007 – Honolulu, Hawaii 8

14-Bit, 125MHz ADC Board

Preliminary Testing Results

Scope Plots - Shaper In and Out

VME Acquisitions with new ADC Board

Simulation - Shaper In and Out