- Previous preamp and digitizer design:
- Gunther's presentation
- Larry's Rough Draft
- Option 1: 1-GSPS + 125-MSPS
- Cost per PMT channel: $1,400
- Cost per ADC channel: $700
- Power estimate per board: 17W
- Option 2: 500-MSPS + 125-MSPS
- Cost per PMT channel: $1,175
- Cost per ADC channel: $590
- Power estimate per board: 13W
- Option 3: 1-GSPS + 250-MSPS
- Cost per PMT channel: $1,481
- Cost per ADC channel: $741
- Power estimate per board: 23W
- Option 4: 500-MSPS + 250-MSPS
- Cost per PMT channel: $1,255
- Cost per ADC channel: $628
- Power estimate per board: 19W
Fast ADC for high gain (2x) channels:
- ADS54J60 Dual-Channel, 16-Bit, 1.0-GSPS
- http://www.ti.com/lit/ds/symlink/ads54j60.pdf
- 1.35W / channel = 10.8W for 8 high speed channels
- Cost each = $850. Total cost for 8 channels = $3400.
- Need 2 JESD channels per ADC, 16 total
- ADS54J54IRGCT Quad Channel, 500 MHz sampling, 14-bit
- http://www.ti.com/lit/ds/symlink/ads54j54.pdf
- 0.875W / channel = 7W for 8 high speed channels
- Cost each = $795. Total cost for 8 channels = $1590.
- Need 2 JESD channels per ADC, 16 total
Slow ADC for low gain (0.5x) channels:
- ADS42LB69 Dual-Channel, 16-Bit, 250-MSPS
- http://www.ti.com/lit/ds/symlink/ads42lb69.pdf
- 0.82W / channel = 6.6W for 8 channels
- Cost each = $240. Total cost for 8 channels = $960
- Uses LVDS IOs.
- ADC3444 Quad-Channel, 14-Bit, 125-MSPS
- http://www.ti.com/lit/gpn/ADC3444
- 0.098W / channel = ~1W for 8 channels
- Cost each = $160. Total cost for 8 channels = $320.
- Uses LVDS IOs.
For the FPGA we can use a XCKU040 part for about $800
Parameters from meeting of 27 October:
Bandwidth Lower Limit = 10 kHz
Bandwidth Upper Limit = 500 MHz
Sampling Rate = 1 GHz
1 p.e. distribution probable lower limit ~ 1 mV
maximum signal = 1e4 p.e.
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