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Characterization of the PCA16 CERN, 14 th July 2008 M. Mager, L. Musa

Characterization of the PCA16 CERN, 14 th July 2008 M. Mager, L. Musa. PCA16 - modes of operation. Shaper Mode. Preamp Mode. Performance very close to the design specifications in all modes of operation. Shaper Mode. Shaper Mode – Some Results. Positive Polarity (MWPC-like Input Signal).

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Characterization of the PCA16 CERN, 14 th July 2008 M. Mager, L. Musa

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  1. Characterization of the PCA16 CERN, 14th July 2008 M. Mager, L. Musa

  2. PCA16 - modes of operation Shaper Mode Preamp Mode Performance very close to the design specifications in all modes of operation

  3. Shaper Mode

  4. Shaper Mode – Some Results Positive Polarity (MWPC-like Input Signal)

  5. Shaper Mode – Some Results Positive Polarity (MWPC-like Input Signal)

  6. Shaper Mode – Some Results Positive Polarity (MWPC-like Input Signal)

  7. Shaper Mode – Some Results Positive Polarity (MWPC-like Input Signal)

  8. Shaper Mode – Some Results Negative Polarity (GEM-like Input Signal)

  9. Shaper Mode – Some Results Negative Polarity (GEM-like Input Signal)

  10. Shaper Mode – Some Results Negative Polarity (GEM-like Input Signal)

  11. Shaper Mode – Some Results Negative Polarity (GEM-like Input Signal)

  12. Preamp Mode – Some Results Negative Polarity (GEM-like Input Signal)

  13. Preamp Mode – Some Results Negative Polarity (GEM-like Input Signal)

  14. Preamp Mode – Some Results Negative Polarity (GEM-like Input Signal)

  15. Negative Polarity (GEM-like Input Signal)

  16. ALTRO Reference Voltages ALICE PASA Configuration 1.56V 0.56V VREFTOP VIN OUT TSA1001 VREFBOT OUTB VINB INCM 1.56V 0V 1mF 10nF 0.56V DC ref. = 1.02V 1mF 10nF • Reference Range (RR) = VREFTOP – VREFBOT • Dynamic Range (DR) = [-RR ; + RR] • Conversion Gain: CG = 1024 / (2 x RR) • Digital Output Code = (VIN-VINB) x CG + 512 • Digital Output Code Range = 0:1023

  17. ALTRO Reference Voltages ALICE PASA Configuration 1.56V 0.56V VREFTOP VIN OUT TSA1001 VREFBOT OUTB VINB INCM 1.56V 0V 1mF 10nF 0.56V DC ref. = 1.02V 1mF 10nF Example of PCA16 Configuration (different for different settings) 1250mV 250mV VREFTOP VIN OUT TSA1001 VREFBOT OUTB VINB INCM 1250mV 0V 1mF 10nF 250mV DC ref. = 1.08V 1mF 10nF

  18. ALTRO Reference Voltages The DC levels of the PCA16 shaping amplifier vary with the CG

  19. ALTRO Reference Voltages R2 R1 ALICE TPC values: 220 W , 1100 W  VTOP = 1020mV Proposed new values: 150 W, 1100 W  VTOP = 1078mV

  20. ALTRO Reference Voltages The DC levels of the PCA16 shaping amplifier vary with the CG

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