Transcript Analog sum output - Indico

Status 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)
Supply control
± 6V
± 12 V
CPU
Power
supply
CAN-Open
DAC
ADC
Trigger in
Test
pulse
Threshold control
• 32 channels
• VME 9U mechanics
• Include services:
• Analog sums
• Remote threshold
• Individual channel
threshold control
• Pulsing system
Analog in
Final board
LVDS out
LVDS driver
LVDS out
Pre-amplifier stage
Dual thr. Discriminator
& shaper
Analog sum
Analog sum
out
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)
Analog 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 W, Lemo-00
4Ch
4Ch
sum 4 sum 4
4Ch
4Ch
sum 4
Su
sum 16
16Ch
Analog sum board
•Power consumption
V+ = +6V @ I+ = +12mA
V- = -6V @ I- = -12mA
Sums up to 4 input channels, range 0 to -2V
Output signal can be inverted or non-inverted
with respect to the input signals
Bandwidht 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 VME9U
We already have:
-Mezzanine Boards
(ToT discriminators)
-Sum Boards (1 “banana”
or 4 blocks each)
- Sum Boards (16 blocks
each)
We will soon have:
- Power supply boards
(+12 to +6V and -12 to
-6V)
Threshold 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 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
CPU
VME9U
PhotoMultiplier
Tube
CABLE
SPI
R3
C2
R2
5
+
OUT
R6
6
Int Osc
ON-OFF
U1B
R4
R1
50 R
Int-Ext
Trigger
7
-
1
Internal Trigger
Oscillator 100Hz
2
R5
32Channels
Decoder +
Pulse Generator
ON_OFF CONTROL
Widht = 10ns
Amplitude = 100mV PULSE IN
U2B
7
+
-
31
5
OUT
6
R7
10 0R
SHAPER
10ns
32
PULSE OUT
Pulse System
TELL62
LVDS OUT
CAN in, CAN out
Remote
Control
FEE LAV VME9U
Sum 1 to 16
Sums 1 to 4, 5 to 8,
9 to 12, 13 to 16
Sum 17 to 32
Sums 17 to 20, 21 to 24,
25 to 28, 29 to 32
Local
Control
USB
Vth_H and Vth_L test points
and adjust trimmers
Wiener LAV crate
Voltages
Module
type
Voltage
range
Channels per
module
Peak
output
Power
+12V
MEH
7V to 16V
1
46A
550W
-12V
MEH
7V to 16V
1
46
550W
+48V
MEH
30V to
60V
1
13.5A
650W
+3.3V
digital
MDH
2V to 7V
2
+/-30A
210W (420W
Total)
2
+/-30A
210W (420W
Total)
+5V digital
+5V
analog
-5V analog
2V to 7V
MDH
2V to 7V
2V to 7V
15
Roadmap 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
16
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