1. Application of ASIC for Cherenkov Detection
Yan Xiongbo
4/5/2019
THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES

2. THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES
Outline
PARISROC introduction
ARCHGARD Chip description
Simulation results
Conclusion
4/5/2019
THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES

3. PARISROC-LAL, IN2P3,France
Process：AMS 0.35um SiGe
Power supply：3.3V
Output range：1.2V
Input range：1-300 p.e.
Noise：1/10 p.e.
Nonlinearity：<1%
Bandgap,ADC,TDC,DAC
16 channels
Dissipation: 10mW/ch
4/5/2019
THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES

4. ARCHGARD architecture
Outside of chip
-16 channels
-2 gains:x5, x1/2
-tuneable gain for preamp
-variable shaping time
-auto/force gain choice
-charge output in serial
-trigger output in parallel
-bandgap
4/5/2019
THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES

5. THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES
Simulation results(1)
Input current signal
Block output
preamp
SSH
FSH
4/5/2019
THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES

6. THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES
Simulation results(2)
Noise performance
Preamplifier
Gain=5
Slow shaper
RC=25 ns
Fast shaper
Output voltage
2.442 mV
2.776 mV
18.52 mV
Rms noise
Noise in p.e.
463.5 V
0.188
264.7 V
0.095
1.947 mV
0.105
SNR
5.3
10.5
9.5
SNR>10
Output linearity
Nonlinearity<1%
1-300p.e.
p.e.
4/5/2019
THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES

7. THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES
Simulation results(3)
Preamp linearity vs. 1/Cf
Nonlinearity<2%
Time walk of trigger when Vth=1/5p.e.
Bandgap output
1 p.e.
300 p.e.
Time walk=3ns
Temp (C)
TC=3.1ppm /C( C)
4/5/2019
THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES

8. Performance conclusion
Process：charted 0.35um SiGe DualGate
16 channels
Area：3.7mm*2.5mm
Power supply：3.3V
Bandgap C, 3.1ppm/C( C)
Output range：1V
Input range： p.e.
Noise：1/10 p.e.(SSH) ;1/9p.e.(FS)
Nonlinearity：<1%
Time walk：3ns (Vth=1/5 p.e.)
Dissipation: 10mW/ch
4/5/2019
THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES

9. THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES
Next step
Chip testing
Chip improvement
-move input cap outside the chip
-modify for WFCTA fluorescence mode
4/5/2019
THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES

10. THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES
Thank you!
4/5/2019
THE 2nd WORKSHOP OF AIR SHOWER DETECTION AT HIGH ALTITUDES