1. 1 PARISROC2 ADC Measurements A. EL BERNI 28/05/2010

2. 2 ADC Ramp 10 bits Δt= 25 µs ΔV= 2.24V A. EL BERNI TDC RAMP 1 ΔV= 1.35V 28/05/2010 10 bits LSB= 2.2 mV Min = 0.889 V Max = 3.13V Min = 1.33 V Max = 2.68V

3. 3 ADC PEDESTALS MEASUREMENTS A. EL BERNI 28/05/2010 External Trigger No Input

4. 4 A. EL BERNI ADC 1.2V INPUT MEASUREMENTS 28/05/2010 External Trigger 1.2 V on In_ADC_Ext input

5. 5 ADC linearity for CH4 10 bits 25 acquisitions per step DC supply drive ADC from 0.89V to 3.136V with 250µV steps. 25 acquisitions done for each step. ADC fit residuals close to half a LSB. ADC LINEARITY MEASUREMENTS A. EL BERNI 28/05/2010 CH4 ALL CHANNELS

6. 6 ADC LINEARITY ONE LSB MEASUREMENTS A. EL BERNI 28/05/2010 CH4 10 bits 25 acquisitions per DC Supply step (250µV).

7. 7 On the left the Slow Shaper Low Gain is off, on right it’s on, No influences on HG stage showed by this two pictures. ADC max charge SSH=92 SLOW SHAPER HIGH GAIN with Delay Box A. EL BERNI 28/05/2010 G_PA = 10 Rf = 16 k G_SSH = 1/2 Shaping time = 50 ns PA_LG on & SSH_LG offPA_LG on & SSH_LG on

8. 8 This figure displays results Slow Shaper HG when Slow Shaper LG and Preamplifier LG are both off ADC max charge SSH=93. A. EL BERNI 28/05/2010 PA_LG off & SSH_LG off

9. 9 On left Slow Shaper High Gain is OFF, on right it is ON, No influences on SSH HG SLOW SHAPER LOW GAIN with Delay Box A. EL BERNI Input 30pe With Bias PA_HG Input 30pe Without Bias PA_HG 28/05/2010 G_PA = 1 Rf = 16 k G_SSH = 1/2 Shaping time = 50 ns

10. 10 SSH_HG -2.54 % < Res < 1.82 SLOW SHAPER HIGH GAIN LINEARITY with oscilloscope A. EL BERNI 28/05/2010

11. 11 Slow Shaper Linearity HG (DAC Discri gain=610) and PA LG + SSH LG are ON. In comparison with SSH measurement via analogue probe SSH linearity is better. SLOW SHAPER HIGH GAIN LINEARITY with Delay Box A. EL BERNI 28/05/2010

12. 12 SLOW SHAPER HIGH GAIN LINEARITY RESIDUALS Scope Measurements SSH_HG -2.54% < Res < 1.82 SSH_HG Scope -2.54% < Res < 1.82% ADC LSB = 2.2 mV ADC -0.64% < Res < 1.5% A. EL BERNI 28/05/2010 ADC Measurements SSH_HG -1.85 LSB < Res < 4.35 LSB

13. 13 SLOW SHAPER LOW GAIN LINEARITY with oscilloscope A. EL BERNI 28/05/2010

14. 14 SLOW SHAPER LOW GAIN LINEARITY with Delay Box A. EL BERNI 28/05/2010 Slow Shaper Linearity LG saturation is close to 650 pe Saturation 650 pe

15. 15 A. EL BERNI 28/05/2010

16. 16 Scope Measurements SSH_LG -4% < Res < 3% ADC Measurements SSH_LG -2 LSB < Res < 9.2 LSB SLOW SHAPER LOW GAIN LINEARITY RESIDUALS SSH_LG Residuals comparison Scope -4% < Res < 3% ADC LSB = 2.2 mV ADC -0.7% < Res < 3.2% A. EL BERNI 28/05/2010

17. 17 A. EL BERNI 28/05/2010 ADC CHARGE MEASUREMENTS Input = 3pe Input = 10pe PARISROC 2 LSB = 2.2 mV PARISROC LSB = 1.06 mV

18. 18 A. EL BERNI 28/05/2010 NEXT STEPS Charge measurements Delay box linearity + jitter Charge measurement on each SCA depth Others ?