ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 1 the Embedded Local Monitor Board ELMB Design description of the Embedded Local Monitor.

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Presentation transcript:

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March the Embedded Local Monitor Board ELMB Design description of the Embedded Local Monitor Board ELMB

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Introduction to the ELMB Application -specific motherboard with signal-conditioning electronics, optoisolation ADC, DAC, connectors CANopen CAN Temperature Magnetic Field sensors Voltages, Currents Thresholds ON/OFF monitor ON/OFF I2C JTAG USER Defined ANALOG IN ANALOG OUT DIGITAL IN DIGITAL OUT Front-end Electronics Configuration ELMB

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March ELMB block diagram CAN Trans- ceiver OPTO Voltage Regulator ATMega103L 128K flash 4K RAM 4k EEPROM 64 ch MUX ADC CS5523 (other) Port A Port C Port F Voltage Regulator Voltage Regulators VCP, VCG 8 to12V, 20 mA CAN GND VAP, VAG 8 to 12V, 10 mA VDP, VDG 6 V to 12V, 15 mA DIGITAL GND ANALOG GND CAN bus cable 4 ±5V 3.3V 5V Digital I/O AT90S2313 SLAVE SAE81C91 CAN controller DIP switches OPTO 5

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March ELMB front side 50 mm 67 mm DIP-SW ID BAUD ISP OPTOs CAN SAE81C91 Voltage regulators ATMEL micros CAN Tranceiver 3.3 to 5.4V option? VSup

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March ELMB back side ADC 2*50 pin Bergstac connector ADC Analog MUX REF Logic Latch

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March ELMB specifications  )  General-purpose plug-on module (50 x 67 mm 2 )  CANbus interface (Full-CAN controller)  CANopen communication protocol  In System Programmable also via CAN bus second microcontroller with dedicated tasks for SEE  Optional 64 inputs of 16-bit ADC with 7 bit gain  Cost goal $2 / ch for ADC+CAN  Cost goal $2 / ch for ADC+CAN Presently component cost (with pcb) ~ 94 CHF (> 5k)

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Key components ADC Optocouplers Power regulators Microcontrollers

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March ELMB ADC

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Crystal CS5523 Resolution Bits CMR DC, 50Hz 120 dB Linearity ± % FS Offset ± 2 LSB Stability 20 nV / º C Gain 1 ppm/ º C Delta-Sigma ADC 2 Hz to 100 Hz ±25 mV to ±5 V differential BUT Absolute precision ± 15%!

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Stability of the ADC 1uV

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Resolution ADC

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March High precision temperature measurement After calibration ~3 mK absolute precision at ATLAS LAr calorimeter given by sensor quality

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Optocouplers

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Optocoupler tests Test of components in TCC and 1999

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Optos..

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Optocouplers for ground loop isolation ELMB uses two types: slow slow HCPL0731 (considered to be safe for SEE) fast fast HCPL-0601 (is sensitive for SEE) in the ELMB this SEE sensitivity is handled by the CAN bit error handling!

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Power regulators

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Voltage regulators for protection and filtering 3.3 V MIC5203 is loaded with 11 ohms or 1Watt

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Current ~150 mA After 200 ms the DC current is 35 mA 3.3V DC load dissipation is 13 mW DC Regulator dissipation is 350 mW Limiting Output voltage of the MIC5203 Trigger

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Accelerated ageing test ~ 40000h at 25 o C

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March V Regulator NIEL results

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March Microcontrollers

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March ELMB Microcontroller chosen to have low power consumption CSEM R&D

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March ATMEL AVR  Based on Nordic VLSI RISC core  Flash memory  In system programmable ISP  Low power  Low cost = $1 to $9 Good software  HW and SW compatible family from 1k to 128 k  ATmega103L or ATmega128L?

ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March AVR.. The behaviour of the ELMB is (of course) entirely under software control e.g. the SEE sensitivity is determined by the SOFTWARE