SIAM M. Despeisse / 29 th January Toward a Gigatracker Front-end - Performance of the NINO LCO and HCO Matthieu Despeisse F. Osmic, S. Tiuraniemi, P. Jarron, P. Riedler

SIAM M. Despeisse / 29 th January OUTLINE Laser Measurements :Data analysis w. induced signal calculations NINO LCO + pre-amp Electrical characterizations of NINO LCO Characterization of the NINO HCO

SIAM M. Despeisse / 29 th January The 130 nm NINO test-ASIC Integrated electronics : - LCO, 3 channels - HCO NINO_v13: 1.4 mm × 1 mm

SIAM M. Despeisse / 29 th January NINO LCO calibration Expected LCO timing precision for hybrid detector - LCO optimized for 200 fF input capacitance (Higher Cin degrades jitter + minimum threshold) corresponds to the expected performance in a hybrid pixel configuration of LCO estimates what to expect from external measurements on this chip Laser Measurements on Silicon sensor pixel Calibration via a 100 fF injection capacitance IN CHIP Calibration via a 1 pF injection capacitance OUTSIDE CHIP

SIAM M. Despeisse / 29 th January NINO LCO calibration 1.5 fC 1 ns CALIBRATION w/ 100 fF injection capacitance

SIAM M. Despeisse / 29 th January NINO LCO calibration Expected LCO global timing precision CALIBRATION w/ 100 fF injection capacitance

SIAM M. Despeisse / 29 th January NINO LCO calibration 1 ns CALIBRATION w/ 1 pF injection capacitance External TESTS

SIAM M. Despeisse / 29 th January NINO LCO calibration Strong degradation of measured jitter compared to the 100 fF tests CALIBRATION w/ 1 pF injection capacitance External TESTS

SIAM M. Despeisse / 29 th January NINO LCO calibration - Conclusion Expected LCO global timing precision in the Gigatracker application ? - LCO designed for 200 fF input capacitance - Higher Cin degrades jitter + minimum threshold Laser Measurements on Silicon sensor pixel CALIBRATION w/ 1 pF injection capacitance External TESTS CALIBRATION w/ 100 fF injection capacitance Simulations Data analysis

SIAM M. Despeisse / 29 th January OUTLINE Laser Measurements : Data analysis w. induced signal calculations NINO LCO + pre-amp Electrical characterizations of NINO LCO Characterization of the NINO HCO

SIAM M. Despeisse / 29 th January Test set-up – Fadmar, Sakari Silicon detector: 300 µm × 300 µm pixel, 200 µm thick sensor Wire bond connection to a LCO channel 1060 nm pulsed Laser tests Laser calibration – position done / Fadmar, Sakari 1 ns

SIAM M. Despeisse / 29 th January Induced signal – simple calculations Simple calculations based on 200 V detector bias + infinite parallel plate approximation For a simultaneous generation of e - /h + pairs equally distributed in the sensor thickness (MIP) Ideal shape

SIAM M. Despeisse / 29 th January Induced signal – simple calculations Simple calculations based on 200 V detector bias + infinite parallel plate approximation Taking into account the laser pulse shape

SIAM M. Despeisse / 29 th January Induced signal – simple calculations Simple calculations based on 200 V detector bias + infinite parallel plate approximation Taking into account the laser pulse shape

SIAM M. Despeisse / 29 th January measurements Simulations w. calculated signals Tests results 1 ns Calculated signals pF total Cin give good fitting

SIAM M. Despeisse / 29 th January measurements Simulations w. calculated signals Simulations w. calculated signals measurements Calculated signals pF total Cin give good fitting NINO LCO SIMULATIONS w. calculated signals Precise Jitter estimation from simulations

SIAM M. Despeisse / 29 th January measurements sim. 1.2 pF sim. 0.7 pF sim. 0.3 pF sim. 1.2 pF sim. 0.7 pF sim. 0.3 pF CAPACITANCE INFLUENCE NINO LCO SIMULATIONS w. calculated signals

SIAM M. Despeisse / 29 th January CAPACITANCE INFLUENCE Points simulated w. similar input signals Reducing the capa. reduces the pulse width and so the time walk variations NINO LCO SIMULATIONS w. calculated signals 1 ns

SIAM M. Despeisse / 29 th January What we expect w. Ideal shape signals NINO LCO SIMULATIONS w. calculated signals Measurements w. 100 fF injection Jitter estimation for the LCO connected via bump bonding to the sensor: 1.5 fC

SIAM M. Despeisse / 29 th January OUTLINE Laser Measurements :Data analysis w. induced signal calculations NINO LCO + pre-amp Electrical characterizations of NINO LCO Characterization of the NINO HCO

SIAM M. Despeisse / 29 th January NINO LCO SIMULATIONS w. pre-amp Use of additionnal pre-amp for the Gigatracker pixel front end Ideal currents LCO inputs LCO outputs 1, 2, 3 fC Pre-amp Under optimization

SIAM M. Despeisse / 29 th January NINO LCO SIMULATIONS w. calculated signals Jitter performance (simulations) 1 fC 0.7 fC 0.5 fC Jitter < 150 ps for charges >= 0.8 fC Pre-amp Under optimization

SIAM M. Despeisse / 29 th January OUTLINE Laser Measurements :Data analysis w. induced signal calculations NINO LCO + pre-amp Electrical characterizations of NINO LCO Characterization of the NINO HCO

SIAM M. Despeisse / 29 th January NINO HCO HCO circuit optimized for few pF input capacitance Tests via a 1 pF capacitance OUTSIDE CHIP, for a Rin ~ 75 Ω – Power ~ 4.5 mW / channel Minimum 6 fC Minimum 10 fC Minimum 12.5 fC

SIAM M. Despeisse / 29 th January NINO HCO HCO circuit optimized for few pF input capacitance Tests via a 1 pF capacitance OUTSIDE CHIP, for a Rin ~ 75 Ω – Power ~ 4.5 mW / channel NB: Simulation technique for the jitter shows good results on HCO too.

SIAM M. Despeisse / 29 th January CONCLUSIONS NINO LCO measurements - simulations Showed that we can reach for a hybrid detector : -min. detectable charge of ps rms - jitter 2 fC Pre-amp + LCO - simulations Showed that we can reach for a hybrid detector : - min. detectable charge of ps rms - jitter 0.8 fC HCO possible candidate for end of column receiver Measurements and simulations show < 20 ps rms jitter for fast input signals w. charges > 10 fC