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Powering tests. Laura Gonella Physikalisches Institut Uni Bonn. Meaurements. For different powering configuration, measure. For now done on bare chips. Current PCB does not have circuitry for sensor HV. 43. 86. - PowerPoint PPT Presentation
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Powering tests
Laura Gonella Physikalisches Institut Uni Bonn
Meaurements
• For different powering configuration, measure
For now done on bare chips. Current PCB does not have circuitry for sensor HV.
Wire bond from VDDA pad to measurement point. Same for VDDD.
VDDA2M is not connected on the PCB. It was removed to make space for regulator testing circuitry.
4386
18/05/20112 L. Gonella - Powering tests
Powering configurations
18/05/20113 L. Gonella - Powering tests
Setup
• Power is provided via power supply• USBpix is used only to send/receive signals to/from the chip
– Stcontrol– Standard configuration file
• Top row not powered
• Switching on sequence– Power up chip. Both VDDA and VDDD applied at the same time– Start the clock via STcontrol– Configure– Run scans
18/05/20114 L. Gonella - Powering tests
Direct powering configuration 1
18/05/20115 L. Gonella - Powering tests
Direct powering configuration 1
• Rwire = 0.2Ohm round trip
18/05/20116 L. Gonella - Powering tests
1.5V
1.2V
Rwire RpcbRwb
Rpcb
Rwb
Rwire
Voltages and currents
V @ supply (V) V @ chip (V) I (mA)
Power up A 1.5 1.502 13
D 1.2 1.199 3
Clock on A 1.5 1.502 13
D 1.2 1.174 96
Std cfg A 1.5 1.458 268
D 1.2 (1.22) 1.172(1.191) 106(109)
PrmpVbp*2 A 1.5 1.442 369
D 1.22 1.191 109
18/05/20117 L. Gonella - Powering tests
Digital and analog scans• Digital scan: The digital
scan is fine when powering from USBPix.
• Analog scan
18/05/20118 L. Gonella - Powering tests
Threshold scan
18/05/20119 L. Gonella - Powering tests
Threshold scan
18/05/201110 L. Gonella - Powering tests
Threshold scan – PrmpVbp*2
18/05/201111 L. Gonella - Powering tests
Direct powering configuration 2
18/05/201112 L. Gonella - Powering tests
Direct powering configuration 2
• VDDD and VDDA shorted at supply• Rwire = 0.2Ohm round trip
Rwire
RpcbRwb
Rpcb
Rwb
Rwire
1.5V
18/05/201113 L. Gonella - Powering tests
Voltages and currents
V @ supply (V) V @ chip (V) I (mA)
Power up A 1.5 1.502 19
D 1.502
Clock on A 1.5 1.497 129
D 1.476
Std cfg A 1.5 1.460 483
D 1.442
PrmpVbp*2 A 1.5 1.450 511
D 1.455
18/05/201114 L. Gonella - Powering tests
Digital and analog scan
• Digital scan • Analog scan
18/05/201115 L. Gonella - Powering tests
Threshold scan
18/05/201116 L. Gonella - Powering tests
Threshold scan
18/05/201117 L. Gonella - Powering tests
Threshold scan – PrmpVbp*2
18/05/201118 L. Gonella - Powering tests
Discussion with Mauro• Mauro could provide within one week from now
– Board with LV PP2 regulator– Controller– Easy Labview interface– Type 2 cables
• As we are interested in transients we would need some more realistic cables– Mauro said this might take an extra week to have
• On top add time to get things to work in Bonn (max 1 week?)• Mauro offered to come to Bonn and help at the beginning of
June• Option 1 (type 2 cables): tests could start in 2 weeks form
now (2nd of June)• Option 2 (more realistic cables): tests could start in 3 weeks
from now (9th of June)• These are anyway far from being definitive dates• I agreed with Mauro that I will call him after this meeting to
tell him what we decided18/05/201119 L. Gonella - Powering tests
Future tests
• I am willing to finish the tests of the powering configurations with what I have right now and do them again with what Mauro sends– Provided what I am doing now is interesting and we can wait to
get stuff from Mauro• After that I will go on with tests on the Shunt-LDO regulator
with main focus on the full shunt-LDO mode for serial powering
• Tests of different powering configurations with modules will follow as well
• I will be providing support to people working on developing the powering scheme for the IBL with the Shunt-LDO
18/05/201120 L. Gonella - Powering tests