Carrier Board External Interfaces

+12VDC Power (Required)

• When the daugther board is plugged in, the total power draw is about 10W (+12VDC @ 0.8A)
  
  • Carrier Board is ~5W
  • Digital Daughter board is ~5W
• To prevent the boards from overheating, we require cool air to be blown on the carrier/daughter card
  
  • Using a thermal electric cool on the ASIC would be an acceptable thermal management solution as well
• The image below is the carrier board's input power circuit :
  • The mating connector to the carrier board's power connector is "MOLEX 39-01-3042" and the pinout is:
    • PIN1 = PWR (+12VDC)

    • PIN2 = PWR (+12VDC)

    • PIN3 = PWR_RTN (GND)

    • PIN4 = PWR_RTN (GND)

PGP/ETH (Required)

• This SFP interface is the PGP or ETH (depending on which firmware is loaded)
• When ETH firmware is load:
  
  • Ethernet PHY is 1000BASE-SX

ASIC (Required)

• This is the interface that the digital daughter board plugs into

-120V Bias (Optional)

• Single ended LEMO connector
• Drives the ASIC's high voltage bias
• Only required if you are doing laser testing or beam testing

SLAC EVR (Optional)

• Used for interfacing to the SLAC's linac timing system

TTL Input (Optional)

• Used for external triggering
• +5V TTL logic levels
• BNC Connector

TTL Output (Optional)

• Currently usued in the firmware
• +5V TTL logic levels
• BNC Connector

External Differential 40 MHz Reference (Optional)

• Used for external 40 MHz timing reference

• Differential LEMO

Contact

Dionisio Doering 

ddoering@slac.stanford.edu