SU717
Contents
Description
This module is a charge to digital converter. It consists of 3 blocks:
1) Front end (Signal conditioning) 2) FPGA controlled integrator 3) Analog to digital converter
The front end consist of a LEMO connector and after that can be found a RF transformer or a capacitor, or can be connected direct to the integrator input. The detector signal should be ac coupled to avoid dc errors.
The integrator is based on an operation amplifier and a TTL controlled switch to reset the capacitor charge. In this way the integration time can be set through an external control signal.
The last stage is a 14-Bit analog to digital converter and it can be run up to 100MHz from Texas instruments ADS5500. All ADC control and data signals are routed to the sub-module back connector.
Block Diagram
Version 0
Front planel
Version 0
| Name | Type | Qty. | Dir. | Function |
|---|---|---|---|---|
| Analog input | LEMO connector | 1x | input | Detector input |
| DIO | LEMO connector | 1x | input/output | Digital input/output (LVTTL) |
| LED | Led | 1x | ||
| Led to show some information | ||||
| POT | Potentiometer | 1x | ||
| Cancel the integrator bias current |
Back Connector
Version 0
SU717 pin table (direction shown for the SU board!)
power in +5V 2 1 +5V in power
LVTTL in RESET 4 3 CLKout out LVTTL
LVTTL out DATA<0> 6 5 DATA<1> out LVTTL
LVTTL out DATA<2> 8 7 DATA<3> out LVTTL
LVTTL out DATA<4> 10 9 DATA<5> out LVTTL
LVTTL out DATA<6> 12 11 DATA<7> out LVTTL
LVTTL out DATA<8> 14 13 DATA<9> out LVTTL
LVTTL out DATA<10> 16 15 DATA<11> out LVTTL
LVTTL out DATA<12> 18 17 DATA<13> out LVTTL
NC - - 20 19 SCLKn in LVTTL
LVTTL in SDATA 22 21 SEn in LVTTL
LVTTL in CLKp 24 23 CLKn in LVTTL
LVTTL in DIO_OUT 26 25 DIO_OEn in LVTTL
LVTTL in QRESETn 28 27 DIO_IN out LVTTL
LVTTL in QSHORTn 30 29 - - NC
NC - - 32 31 LEDn in LVTTL
NC - - 34 33 - - NC
power in GND 36 35 GND in power
