Transcript Front End. - Agenda INFN

Front End.
TOP side.
Detector linear voltage regulator
Charge pre-amp and detector
Voltage regulator.
BOTTOM side.
Charge pre-amp.
Front End. Trans-impedence or
charge amplifier
40ns
40ns
40ns
Signal IN
40ns
420ns
Signal IN
Signal OUT
Charge – Preamplifier
• Custom discrete amplifier at
BJT transistor.
• Gain = 1.4V/pC
• Power dissipation = 16mW
• Single power = 6V to GND
• Dynamic Range 2.2V 50R
• Tau IN = 40ns
Signal OUT
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Trans-impedence –
Preamplifier
Custom discrete amplifier
• Gain = 3k
Power dissipation = 12mW
Single power = 6V to GND
Dynamic Range 2.2V 50R
Front End APD voltage regulator.
APD
REMOTE Voltage Generator.
Primary Voltage 600V for APD
I2C
Current
limit
Linear
Regulator
ADC
I2C
Voltage Regulator
• Max Current 500uA
•
Voltage
Range
To Slow Control
DAC
Electronics performances
• DC Stability: 0,5%
• Accuracy: 10mV su 600V
• Thermic Range: 0 to 40°C
• Resolution: 1bit
– 300V to 580V
• DAC Rail to Rail 16-BIT
I2C
• ADC ∆∑ 16-BIT I2C
HV APD control system.
16 Analog
Signal Output
Rear Panel NIM1U
Front Panel NIM1U
16 Analog
Signal Input
16 line I2C.
Slow Control
Front end
1-Ware
protocol for
external
sensor:
- Temperature.
- Humidity.
High Voltage
Generator.
Frequency: 250kHz.
Stability: 0,1%
Selectable Voltage:
- 50V
- 100V
- 600V
USB &
Ethernet
Connection
ON BOARD:
• CPU (LPC1768FBD100)
• HV for 16CH Front End
• LV for 16CH Front End
Front End control system for APDs.
• Web panel.
– sets and reads back
single channels HVs.
– Single channel
temperature reading