Rémi CORNAT (IN2P3/LPC) - Review feb’05 Preshower FE Board design R. Bonnefoy, G. Bohner, C. Cârloganu, E. Conte, R. Cornat, E. Delage, J. Lecoq M-L. Mercier, P. Perret

Rémi CORNAT (IN2P3/LPC) - Review feb’05 2 Overview : FE board x 64

Rémi CORNAT (IN2P3/LPC) - Review feb’05 Analogue receiver & digitization

Rémi CORNAT (IN2P3/LPC) - Review feb’05 4 Analogue receiver & ADC Q2’01

Rémi CORNAT (IN2P3/LPC) - Review feb’05 5 Prototype Constraints – 1 cm height per channel 64 channels/32 cm – EMC Noise σ=0,8 mV lowered to 0,4 mV PCB hierarchical block – CMS 0805 – AD9203 – Compact placement – Ground plane – Signal diff. pairs – Diff. clock

Rémi CORNAT (IN2P3/LPC) - Review feb’05 6 New analogue module Refined component placement Compatible for both ADC multiplexing and direct connection to Fe_PGA Optimized differential signal traces Q4’03

Rémi CORNAT (IN2P3/LPC) - Review feb’05 Digital processing

Rémi CORNAT (IN2P3/LPC) - Review feb’05 8 Digital processing 8 bits parameters Optimized operators sizes 4 pipe-line steps Offset  [0..255] Gain = 1+ G/512, G  [0..255] Alpha = A/512, A  [0..255] Trigger threshold  [0..255]

Rémi CORNAT (IN2P3/LPC) - Review feb’05 9 Data processing Design Options Fe_PGA ‘S’ version – AX1000 pga ASIC + Fe_PGA ‘A’ version – AX250 pga – 2 ASICs / pga – Multiplexed ADCs (80 MHz) Both are using LAL L0 readout ECS interfaces are LPC made The current prototype implements the 2 ways : 32 channels with ASIC 32 channels without ASIC

Rémi CORNAT (IN2P3/LPC) - Review feb’05 10 General architecture

Rémi CORNAT (IN2P3/LPC) - Review feb’05 11 Hamming For parameters registers load_ecs 22 bits words – 16 data bits – 5 hamming bits – 1 global parity bit – Loaded by 8 bits slices from I2C 1 bit error correction 2 bits error detection Decoder shared among 12 22b registers – Cyclic check and correction using a counter

Rémi CORNAT (IN2P3/LPC) - Review feb’05 12 ASIC version 4 channels digital processing I2C interface SEU Autocorrected register bank – Triple voting – EDAC Hamming coding Saves a lot of flip-flops Needs combinational logic Exists in 13/8 or 22/16 versions 6.25 mm² / QFP80 package combseq Hamming voting AMS CMOS 0.35µ / CSI Same HDL code used for both ASIC and PGA Q1’03

Rémi CORNAT (IN2P3/LPC) - Review feb’05 13 ASIC test board 40 MHz digital inputs from memory board (40 bits) PQFP80 test support PGA : 80 MHz mux I2C master & Chip emulation Test area Q3’03

Rémi CORNAT (IN2P3/LPC) - Review feb’05 14 Technology choice : ASIC vs AX CAD (HDL & Sim) : ASIC ~ AX Performance : ASIC > AX PCB : ASIC > AX AX allows to freeze design later – Wait for ECS, SEQ, etc… (and then tests) – More low level HW test before production ASIC cost slightly increase as AX cost decrease – ~ same cost on Q4’2004 Final choice : AX 0304 AX ASIC cost

Rémi CORNAT (IN2P3/LPC) - Review feb’05 Trigger part

Rémi CORNAT (IN2P3/LPC) - Review feb’05 16 L0 trigger Link ECAL to PS/SPD Trigger data = 1b/ch

Rémi CORNAT (IN2P3/LPC) - Review feb’05 17 Overview : trigger functions Interconnection between : – SPD and PS (boards corresponding to the same cells) : 24m serial LVDS – Adjacent PS board (T/B : lvcmos 40MHz, R/L : serial LVDS) – ECAL and PS (boards corresponding to the same cells) : serial LVDS – PS and ECAL validation board : serial LVDS – PS and SPD control board (multiplicity) : serial LVDS Cells mapping issue : geographic algorithms 2x2 cluster search algorithm for SPD an PS trigger bits

Rémi CORNAT (IN2P3/LPC) - Review feb’05 18 Trigger task Two cluster addresses sent by ECAL – One per half PS FE Board SPD data deserilization – Received in FE PGAs : sent to DAQ – Centralized into TRIG PGA Neighbours algorithm – Transmission between boards – Simple multiplexor… – Need one Tclk Algorithm validated (Q1’01 prototype) SPD Multiplicity – Adder tree Migration from AX500 to APA450 – Flash allow design upgrade and bug fix (detector mapping ) – AX/APA HDL code ready but not tested

Rémi CORNAT (IN2P3/LPC) - Review feb’05 19 Timing model

Rémi CORNAT (IN2P3/LPC) - Review feb’05 Clock and timing

Rémi CORNAT (IN2P3/LPC) - Review feb’05 21 Logical clock tree Clk taken from the backplane No LVDS RT fan-out found… – Delay chips and LV048 – Multidrop LVDS (Up to 2*4 LVDS buffers per branch) Tree leaves are LVTTL Tree trunk and branches are LVDS Delay chips allow to set – VFE (start of analogue integration time) – VFERST (phase of VFE rst signal) – ADC (analogue signal sampling time) – ADC’ (ADC data sampling time into FE_PGAs) – Sampling time of serial LVDS data (SPD, ECAL, TOP)

Rémi CORNAT (IN2P3/LPC) - Review feb’05 22 Clock model

Rémi CORNAT (IN2P3/LPC) - Review feb’05 23 Clock distribution (schematics) 4*16 ADCs Global clk 8 FE 1 TRIG 1 SEQ 1 GLUE 4 serializers SPD VFE ADC’

Rémi CORNAT (IN2P3/LPC) - Review feb’05 SEL & SEU protection

Rémi CORNAT (IN2P3/LPC) - Review feb’05 25 Radiation test of the Preshower electronics Have been tested at Ganil in April 2003 – Front-End electronic ADC (AD9203): 4 chips Operational Amplifier (AD8132): 4 chips – Very-Front-End electronic New version of the ASIC integrator: 2 chips with 1 complete channel each Active PMT Base (AB): 2 basis with 2 HV transistors each No cumulated dose effects – 26 krad for AB, ASIC and OA – 52 krad for ADC Some SEL observed for ADC – Not destructive The 4 ADC have been tested getting back to laboratory – They all work perfectly Current in the ADC increased “only” by a factor 3 to 4 – Holding the power supply voltage in the required range – Estimation : 10 SEL per year – Use of delatchers No SEL for AB, ASIC and OA

Rémi CORNAT (IN2P3/LPC) - Review feb’05 26 Triple voting Antifuse PGA (FE), RT flash PGA (TRIG, SEQ, GLUE) Triple voting technique : – Used on control bits and FSM state register – Used on RAM address counters – Hamming counters developed (HDL) – Error bits are summarized (logical OR)

Rémi CORNAT (IN2P3/LPC) - Review feb’05 27 EDAC Hamming coding 22 bits words – 16 data bits – 5 hamming bits – 1 global parity bit 1 bit error correction 2 bits error detection Decoder can be shared with many registers – Cyclic check and correction using a counter Saves a lot of flip-flops Needs combinational logic Exists in 13/8 version Synthesis results (4 channels) : combseq Ham tv980576

Rémi CORNAT (IN2P3/LPC) - Review feb’05 28 Power supplies Use of -3.3 and 3.3 V only – Not compatible with ECAL/HCAL boards including CROC – If possible add jumper to select an auxiliary 5V power supply for PS CROC or 5V aux for everybody – Anyway 6 independent PW supply blocs are available (3 modules) – And SPD controller ??? 1.5 V made with LHC regulators SEL sensitive components are protected with self switch-off current limiters A / board (ECAL -5V) +3.3 D5 A / board (ECAL 3.3V) +3.3 D +3.3 A (ECAL +5V) +3.3 A +5 Vfree1Aux for PS CROC

Rémi CORNAT (IN2P3/LPC) - Review feb’05 29 Main characteristics Current limiter – (2A : MAX869, 1.2A : MAX890, – 0.5A : MAX891,…) 2.7 to 5.5 V Switch resistance : 90 m  Programmable current limit (external resistor) – Minimum limit is 0.2*I max (240 mA for MAX890) Fault indicator Enable input (forced switch off is possible) Thermal shutdown

Rémi CORNAT (IN2P3/LPC) - Review feb’05 30 Delatcher with time constant MAX890L 74LVC010

Rémi CORNAT (IN2P3/LPC) - Review feb’05 31 Radiation hardness of MAX8xx MAX869L was tested at GANIL by LAL (thanks to F. Machefert) MAX869L & MAX892L was tested by AMS – Same technology as MAX890L, no SEL – SN74LVC10 tested by ATLAS

Rémi CORNAT (IN2P3/LPC) - Review feb’ prototype

Rémi CORNAT (IN2P3/LPC) - Review feb’05 33 PCB Sent to manufactu rer on 30/04/04 Came back on 18/05 ! Uses SEQ and GLUE unchanged from LAL versions HDL code designed (95 %) Fe Trig Seq Glue

Rémi CORNAT (IN2P3/LPC) - Review feb’05 34 PCB Class layers Fe ‘A’ Seq Glue ASICsADC Delay chips Regulators LVDS clk & glob. Sig network

Rémi CORNAT (IN2P3/LPC) - Review feb’05 35 PCB Class layers Fe ‘S’ Trig Seq JTAG & PRB connector VFE clk & rst LVDS 21:3 SERDES

Rémi CORNAT (IN2P3/LPC) - Review feb’05 Low level tests

Rémi CORNAT (IN2P3/LPC) - Review feb’05 37 Low level tests environment PCB available since mid may’04, home cabled Dedicated VC++ SW Performed WITHOUT GLUE_PGA – No SPECS – But I2C signals connected directly on the PCB through LVDS/TTL converters I2C generation thanks to PCI SPECS MASTER board (and embedded SPECS SLAVE) – Unfortunate limit to 26 words frames making FE_PGA full test impossible – ACK is not checked – Use of an USB based generator designed for L0DU Delay chip not readable (current version) SEQ_PGA since mid aug’04 WITHOUT CROC (jan’05)

Rémi CORNAT (IN2P3/LPC) - Review feb’05 38 ECS issue Need to R/W data processing parameters – ECS HW&SW based on USB (specially designed for L0DU) – Generates I2C – Overcomes SPECS limits – Tested with AX1000 – First version designed by a student Q1’04 – New HDL version Q4’04 Stand alone ECS for debug purpose (Laptop) ASIC tests fully done ! USB I2C prototype Q1’04

Rémi CORNAT (IN2P3/LPC) - Review feb’05 39 Test bench Prototype and productions tests VME and SPECS (PCI master) controlled Analogue stimuli from AWG + fan out (64) Designed to generate and capture every FE board I/O (analogue & digital data, TTC, ECS) – Fully autonomous test (no need of a CROC,…) Up to 2^16 BX patterns (digital RAMs) Fully synchronous (1 central clock generator, TTCrq compatible soon) Designed as a simplified backplane (2 slots : FE & CROC) – RJ45 & LVDS links from pattern generator to memory board – Include lvds 21:3 serdes and logic analyzer probe connectors Tests with or without CROC are allowed

Rémi CORNAT (IN2P3/LPC) - Review feb’05 40 Set up AX1000 AX250 2 ASICs SEQ

Rémi CORNAT (IN2P3/LPC) - Review feb’05 41 Tests Board level signals – Clocks (LAL delay chips) & global signals – Signal integrity – I/Os (analogue, L0, rst, SPD deserializer, CROC serializer) – I2C but no ECS Data processing ASIC Data processing PGA Injection RAMs (FE & TRIG) Stringent HDL simulations ensures (most of) behavior error free PGAs (design is not too complex)…

Rémi CORNAT (IN2P3/LPC) - Review feb’05 42 ASIC & AX250 tests (1) Specially designed AX250 with custom Acquisition RAM (no SEQ/CROC) Intensive tests done on ASIC – R/W parameters – Data processing – ADC demultiplexing (80 MHz) AX250 core functions validated (I2C layers, ASIC interface, SPD data) PCB design OK No use of a trigger Partially tested due to SPECS limitation (26 bytes/I2C frame)

Rémi CORNAT (IN2P3/LPC) - Review feb’05 43 ASIC & AX250 tests (2)

Rémi CORNAT (IN2P3/LPC) - Review feb’05 44 AX1000 Same HDL code as for ASIC (data processing) Includes – injection RAM (PS & SPD, 256 words deep) – L0seq LAL interface to SEQ (std acquisition) – Custom acquisition RAM (512 words deep) Trigger controlled 3 trigger shaping options (raw, edge, shaped) TTC controlled Injection/acquisition cycle (test_seq) – Most of final core functions – Need to be refined Test beam ! SEQ tests ! Dedicated SW I2C R/W : ok (SPECS limited) ACQ RAM + raw trigger : ok INJ RAM R/W : ~ok Prelim. Tests with SEQ See Cristina’s talk

Rémi CORNAT (IN2P3/LPC) - Review feb’05 45 New layout P&R fully done – 12 layers, class 6 APA450 as TRIG_PGA 3 DC only 1 test support on one FE_PGA Connector for external USB/I2C generator Individual JTAG/SILEXP connectors for debug purpose

Rémi CORNAT (IN2P3/LPC) - Review feb’05 46 Conclusion PCB : – Drawing & layout techniques ok for production – Global architecture ok – New (final) layout ready ASIC + AX250 – Data processing ok – Not chosen… AX1000 : – Close to final version with many other functions for test beam – More long term tests needed Need to overcome SPECS limitations TRIG – APA450 migration done – Full HDL simulation – Not tested with CROC

Rémi CORNAT (IN2P3/LPC) - Review feb’05 47 From January 1 st 2005:  1 week schematic  7 weeks layout  Review mid February  8 weeks PCB fabrication with components  8 weeks for lab test (May → …)  4 weeks common tests  Ready for production in September?  12 weeks production  Reception December?  Tests Planning