View
213
Download
0
Category
Preview:
Citation preview
SIA
M
M. Despeisse / 29th January 2008 - 1 -
- Toward a Gigatracker Front-end -
Performance of the NINO LCO and HCO
Matthieu DespeisseF. Osmic, S. Tiuraniemi,
P. Jarron, P. Riedler
SIA
M
M. Despeisse / 29th January 2008 - 2 -
OUTLINE
Laser Measurements :Data analysis w. induced signal calculations
NINO LCO + pre-amp
Electrical characterizations of NINO LCO
Characterization of the NINO HCO
SIA
M
M. Despeisse / 29th January 2008 - 3 -
LCO channel
180 m
35 m
The 130 nm NINO test-ASIC
Integrated electronics : - LCO, 3 channels
HCO channel
260 m
130 m
- HCO
NINO_v13: 1.4 mm × 1 mm
SIA
M
M. Despeisse / 29th January 2008 - 4 -
NINO LCO calibration
Expected LCOtiming 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 Measurementson Silicon sensor pixel
Calibration via a 100 fF injection capacitance IN CHIP
Calibration via a 1 pF injection capacitance OUTSIDE CHIP
SIA
M
M. Despeisse / 29th January 2008 - 5 -
NINO LCO calibration
Threshold @ 1.5 fC
1 ns
CALIBRATION w/ 100 fF injection capacitance
SIA
M
M. Despeisse / 29th January 2008 - 6 -
NINO LCO calibration
Expected LCO global timing precision
CALIBRATION w/ 100 fF injection capacitance
SIA
M
M. Despeisse / 29th January 2008 - 7 -
NINO LCO calibration
1 ns
CALIBRATION w/ 1 pF injection capacitanceExternal TESTS
SIA
M
M. Despeisse / 29th January 2008 - 8 -
NINO LCO calibration
Strong degradation of measured jitter compared to the 100 fF tests
CALIBRATION w/ 1 pF injection capacitanceExternal TESTS
SIA
M
M. Despeisse / 29th January 2008 - 9 -
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 Measurementson Silicon sensor pixel
CALIBRATION w/ 1 pF injection capacitance
External TESTS
CALIBRATION w/ 100 fF injection capacitance
SimulationsData analysis
SIA
M
M. Despeisse / 29th January 2008 - 10
-
OUTLINE
Laser Measurements : Data analysis w. induced signal calculations
NINO LCO + pre-amp
Electrical characterizations of NINO LCO
Characterization of the NINO HCO
SIA
M
M. Despeisse / 29th January 2008 - 11
-
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 testsLaser calibration – position done / Fadmar, Sakari
Laser Pulse Shapes
-0.005
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
4.80E+01 4.90E+01 5.00E+01 5.10E+01 5.20E+01 5.30E+01 5.40E+01 5.50E+01 5.60E+01
time [ns]
am
pl [V
]
1.55 V
1.60 V
1.65 V
1.70 V
1.75 V
1.80 V
1.85 V
1.90 V
1.95 V
2.00 V
1 ns
SIA
M
M. Despeisse / 29th January 2008 - 12
-
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
SIA
M
M. Despeisse / 29th January 2008 - 13
-
Induced signal – simple calculations
Simple calculations based on 200 V detector bias + infinite parallel plate approximation
Taking into account the laser pulse shape
Laser Pulse Shapes
-0.005
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
4.80E+01 4.90E+01 5.00E+01 5.10E+01 5.20E+01 5.30E+01 5.40E+01 5.50E+01 5.60E+01
time [ns]
ampl
[V]
1.55 V
1.60 V
1.65 V
1.70 V
1.75 V
1.80 V
1.85 V
1.90 V
1.95 V
2.00 V
1 ns
SIA
M
M. Despeisse / 29th January 2008 - 14
-
Induced signal – simple calculations
Simple calculations based on 200 V detector bias + infinite parallel plate approximation
Taking into account the laser pulse shape
Laser Pulse Shapes
-0.005
0
0.005
0.01
0.015
0.02
0.025
0.03
0.035
4.80E+01 4.90E+01 5.00E+01 5.10E+01 5.20E+01 5.30E+01 5.40E+01 5.50E+01 5.60E+01
time [ns]
ampl
[V]
1.55 V
1.60 V
1.65 V
1.70 V
1.75 V
1.80 V
1.85 V
1.90 V
1.95 V
2.00 V
1 ns
SIA
M
M. Despeisse / 29th January 2008 - 15
-
measurements
Simulations w. calculated signals
Tests results
1 ns1 ns
Calculated signals + 1.2 pF total Cin give good fitting
SIA
M
M. Despeisse / 29th January 2008 - 16
-
measurements
Simulations w. calculated signals
Simulations w. calculated signals
measurements
Calculated signals + 1.2 pF total Cin give good fitting
NINO LCO SIMULATIONS w. calculated signals
Precise Jitter estimation from simulations
SIA
M
M. Despeisse / 29th January 2008 - 17
-
measurements
measurements
sim. 1.2 pF
sim. 0.7 pF
sim. 0.3 pFsim.
1.2 pF
sim. 0.7 pF
sim. 0.3 pF
CAPACITANCE INFLUENCE
NINO LCO SIMULATIONS w. calculated signals
SIA
M
M. Despeisse / 29th January 2008 - 18
-
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
SIA
M
M. Despeisse / 29th January 2008 - 19
-
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:< 180 ps for Q > 1.5 fC
SIA
M
M. Despeisse / 29th January 2008 - 20
-
OUTLINE
Laser Measurements :Data analysis w. induced signal calculations
NINO LCO + pre-amp
Electrical characterizations of NINO LCO
Characterization of the NINO HCO
SIA
M
M. Despeisse / 29th January 2008 - 21
-
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-ampUnder optimization
SIA
M
M. Despeisse / 29th January 2008 - 22
-
NINO LCO SIMULATIONS w. calculated signals
Jitter performance (simulations)
Th @ 1 fC
Th @ 0.7 fC
Th @ 0.5 fC
Jitter < 150 ps for charges >= 0.8 fC
Pre-ampUnder optimization
SIA
M
M. Despeisse / 29th January 2008 - 23
-
OUTLINE
Laser Measurements :Data analysis w. induced signal calculations
NINO LCO + pre-amp
Electrical characterizations of NINO LCO
Characterization of the NINO HCO
SIA
M
M. Despeisse / 29th January 2008 - 24
-
NINO HCO
HCO circuit optimized for few pF input capacitanceTests via a 1 pF capacitance OUTSIDE CHIP, for a Rin ~ 75 Ω – Power ~ 4.5 mW / channel
Minimum charge @ 6 fC Minimum charge
@ 10 fC
Minimum charge @ 12.5 fC
SIA
M
M. Despeisse / 29th January 2008 - 25
-
NINO HCO
HCO circuit optimized for few pF input capacitanceTests 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.
SIA
M
M. Despeisse / 29th January 2008 - 26
-
CONCLUSIONS
NINO LCO measurements - simulationsShowed that we can reach for a hybrid detector :-min. detectable charge of 1.5 fC @ 200 ps rms
- jitter < 150 ps for charges > 2 fC
Pre-amp + LCO - simulationsShowed that we can reach for a hybrid detector :- min. detectable charge of 0.5 fC @ 250 ps rms
- jitter < 150 ps for charges > 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
Recommended