status of lav fee electronics g. corradi, c. paglia, d. tagnani & m. raggi, t. spadaro, p....
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Status of LAV FEE electronicsStatus of LAV FEE electronics
G. Corradi, C. Paglia, D. Tagnani
&
M. Raggi, T. Spadaro, P. Valente
Outline• General LAV readout Diagram• What we did in 2010
– ToT mezzanine design and production (final)– Sum analog board mezzanine (prototypes)– Low voltage regulators (prototypes)
• Planning for 2011– Mother board prototypes– Production– What we needs from outside LNF
General readout diagram LAV
TEL62
Front-end board (Diagram)Front-end board (Diagram)
Pre-amplifier stageDual thr. Discriminator & shaper
LVDS driver
CPU
Threshold control
Supply control± 6V± 12 V
CAN-Open
LVDS out
LVDS out
Analog sum out
Analog sum
Powersupply
Anal
og in
Test pulse
Trigger in
Final board
• 32 channels• VME 9U mechanics• Include services:
• Analog sums• Remote threshold• Individual channel threshold control• Pulsing system
DACADC
Hybrid Front-end board (July 2010)Hybrid Front-end board (July 2010)20 Prototype board
• VME 6U mechanics• 8 input channels• 16 output channels (8x2thr)• Manual threshold control local • 4 threshold by 4 channels
• 2 thr low• 2 thr high
• Sum of 4 analog outputs
4 Discriminator mezzanine boards for the final prototype
Sum for the final mezzanine board
Successfully tested during ANTI-A2 test beam October 2010 @CERN
ToT mezzanine (2 channel)ToT mezzanine (2 channel)
Analog sum outputAnalog sum output• One FEE boards serves 32 channels = 1 layer• 32 outputs cannot all be housed on the board:
(there isn’t place on the panel)• sum 4 block analog signals (e.g. one “banana”)• sum 4 bananas (16 channels = half a layer)• Output via Coax 50 , Lemo-00
sum 4sum 4
sum 4 Su
sum 16
16Ch
4Ch
4Ch 4Ch
4Ch
Analog sum board •Power consumptionV+ = +6V @ I+ = +12mAV- = -6V @ I- = -12mASums up to 4 input channels, range 0 to -2V Output signal can be inverted or non-inverted with respect to the input signalsBandwidht is 50MHz
Input signals
Output signals
Low Voltage Regulators
• Low Voltage regulators are used to generate +/-6V from +12/-12V LAV power rails
• An ultra compact, low noise buck converter, operating at 1.5MHz, generates +6V from +12V
• An innovative design has been used to create -6V from -12V, using a low noise switching converter, operating at 1.5MHz
Final LAV FEE board VME9UFinal LAV FEE board VME9UWe already have:-Mezzanine Boards (ToT discriminators)
-Sum Boards (1 “banana” or 4 blocks each)
- Sum Boards (16 blocks each)
- Power supply boards (+12 to +6V and -12 to -6V)
We will soon have:
Threshold circuitThreshold circuit
• Two different thresholds per channel• Remotely programmable (CAN-Open)
• 0-250 mV range• 12 bit resolution & 1 LSB stability performance
(standard low-cost components, more than enough)• Remotely readable via CAN-Open• Easy to implement automatic threshold tuning
• Local trimmer adjustment• 1 high and 1 low threshold for all channels
Front-end diagnosticsFront-end diagnostics• Provide a test pulse toward the PMT:
• Can be used to check connection up to the PMT• Operation modes
• free-running (controlled by local CPU)• or on external trigger (from TEL62) • pulse all channels• or a programmable pattern
• Signal characteristics• Squared waveform• 10 ns fixed width• 50 or 100 mV ”programmable amplitude in two steps”• Width and amplitude stability at 2% level
Front-end diagnostics
Widht = 10nsAmplitude = 100mV
R2 U1B
+5
-6
OUT7
R3
CABLE
R150R
PULSE OUT
U2B +5
-6
OUT7
C2
R7100R
ON_OFF CONTROL
PULSE IN
1
2
31
32
R6
SHAPER 10ns
Internal TriggerOscillator 100Hz
32ChannelsDecoder +Pulse Generator TELL62
LVDS OUT
PhotoMultiplier Tube
Pulse System
CPU
Int-Ext Trigger
VME9U
Int OscON-OFF
R4
R5
SPI
FEE LAV VME9U
Vth_H and Vth_L test points and adjust trimmers
CAN in, CAN out
USB
Rem
ote
Cont
rol
Loca
l Co
ntro
l
Sum 1 to 16Sums 1 to 4, 5 to 8,
9 to 12, 13 to 16
Sum 1 to 16Sums 1 to 4, 5 to 8,
9 to 12, 13 to 16
Sum 17 to 32Sums 17 to 20, 21 to 24,
25 to 28, 29 to 32
15
Wiener LAV crateWiener LAV crate
VoltagesModule
typeVoltage range
Channels per module
Peak output
Power
+12V MEH 7V to 16V 1 46A 550W
-12V MEH 7V to 16V 1 46 550W
+48V MEH30V to 60V
1 13.5A 650W
+3.3V digital
MDH 2V to 7V 2 +/-30A210W (420W
Total)
+5V digital 2V to 7V
+5V analog
MDH 2V to 7V 2 +/-30A210W (420W
Total)
-5V analog 2V to 7V
16
Roadmap to synchronization runRoadmap to synchronization run• April 2011 first production:
• 3 Full final FEE 9U board (without final firmware release)• 50 discriminator mezzanine boards• 30 sum mezzanine boards• 10 low voltage regulators• Integrated pulse diagnostic system
• April 2011 is last due date to have at LNF:• At least 1 LAV standard VME 9U crate• At least 1 TEL62+TTC• At least 4 TDCb (SCSI2 final vesion)
• July 2010 second bunch of FEE board production• End September 2011:
• We expect to have a working setup FEE-TEL62-PC
Conclusion
• Main component of LAV FEE board have been produced and tested– discriminator mezzanine designed and pre-produced – Analog sum boards designed and pre-produced– Low voltage regulators designed and pre-produced
• The requirement for the VME 9U crate have been established– ±12V 2A per slot required by LAV FEE
• Layout of the 9U motherboard is under design• First mass production of FEE components foreseen in 2011
– First 3 9U motherboard prototypes– Around half of discriminator and sum board mezzanine
• The remote control communication Firmware will be started