1. 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 Board ELMB

2. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 2 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

3. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 3 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 88 8 10 AT90S2313 SLAVE SAE81C91 CAN controller DIP switches OPTO 5

4. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 4 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

5. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 5 ELMB back side ADC 2*50 pin Bergstac connector ADC Analog MUX REF Logic Latch

6. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 6 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)

7. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 7 Key components ADC Optocouplers Power regulators Microcontrollers

8. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 8 ELMB ADC

9. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 9 Crystal CS5523 Resolution 16 + 7 Bits CMR DC, 50Hz 120 dB Linearity ± 0.0015% 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%!

10. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 10 Stability of the ADC 1uV

11. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 11 Resolution ADC

12. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 12 High precision temperature measurement After calibration ~3 mK absolute precision at ATLAS LAr calorimeter given by sensor quality

13. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 13 Optocouplers

14. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 14 Optocoupler tests Test of components in TCC2 1998 and 1999

15. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 15 Optos..

16. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 16 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!

17. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 17 Power regulators

18. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 18 Voltage regulators for protection and filtering 3.3 V MIC5203 is loaded with 11 ohms or 1Watt

19. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 19 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

20. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 20 Accelerated ageing test ~ 40000h at 25 o C

21. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 21 3.3V Regulator NIEL results

22. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 22 Microcontrollers

23. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 23 ELMB Microcontroller chosen to have low power consumption CSEM R&D

24. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 24 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?

25. ATLAS ATLAS DCS B.Hallgren, CERN EP/ ATI PRR CERN 4 March 2001 25 AVR.. The behaviour of the ELMB is (of course) entirely under software control e.g. the SEE sensitivity is determined by the SOFTWARE