Transcript Report on Production testing September 04

ATLAS TRT
ASDBLR & DTMROC Testing
Production Run Completion
Rick Van Berg
for
Gabe Hare, Mike Reilly
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
DTMROC Tests
• Analog (PMU):
–
–
–
–
IDD
DAC outputs
Sense inputs (Temp/Voltage)
Test pulse outputs
• Digital:
– Complete Verilog test suite from Vladimir
• Analog and Digital tests have been integrated
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
DTMROC Status
• Production Testing Completed 8/25/04
– Production Test cuts very stringent
– Will want to rerun after sorting to pick up
additional good chips
• Expect about 30+% of “Bad” chips to pass on a
second pass
• Sorting Files Assembled
– Sort as needed or as possible
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
DTMROC Status II
•
•
•
•
36,338 Chips Tested.
24,912 Passed
12,731 Failed
66% Pass Rate
– Will add at least 10% with a second pass
– Need to test some remaining pre-prod chips
• TRT Requires about 33k (with PP etc.)
– May want to package a few more wafers
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
DTM Loss Statistics
Total Tested
35,753
Total Passed
24,912
Failed Digital
Failed TP Amp
Failed TP Delay
Failed Sense
R. Van Berg, Sept. 2, 2004
7,537
60
4,331
488
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ATLAS TRT
ASDBLR Testing Status
• 139,058 ASDBLR have been tested.
– Includes LHCb wafers (~20% of total)
– TRT owns about 59k ”good” chips after DC and
parametric cuts.
– Retesting of ”bad” chips should yield some additional
(small) gain
• TRT Requirement (A/B/C/Barrel + ~20% spares)
is 64k chips
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
ASDBLR Tests
• Analog (PMU):
–
–
–
–
Power Supplies ICC, IEE
A/B Input Voltages & Resistances
Tracking, Transition Threshold I/V
Data Output Switching (IA, IB in On & Off States)
• Parametric:
– 50% Efficiency Thresholds
• Tracking at: 0 fC, 3 fC, 5 fC
• Transition at: 30 fC, 50 fC
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
Input Resistance Cuts
4,273 had at
least one
input outside
of the input
Resistance
limits of
10,000 –
50,000
Ohms
Nominal = 38 kOhms
26
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
Power Supply Cuts
10,744 were outside of the P power supply
current limits of 0.064 - 0.076
9,480 were outside of the N power supply
current limits of -0.076 - -0.064
8,881 failed BOTH P power supply and N power supply
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
Input Diode Cuts
9,898 had at
least one input
outside of the
input Diode
voltage limits
of 0.5 - 1.05 V
0.725
0.825R. Van Berg, Sept. 2, 2004
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ATLAS TRT
Ternary Output Drive Current
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
Sequential Losses
Preliminary Tests
4,273 : Of All Chips Failed Input Resistance Tests
10,406 : Remaining Chips Failed Power Supply Tests
519 : Remaining Chips Failed Input Diode Voltage Tests
1,300 : Remaining Chips Failed Threshold Current Tests
838 : Remaining Chips Failed Output Current Sum Tests
11,760 : Remaining Chips Failed Output Switching Tests
19,684 : Remaining Chips Failed Half Efficiency Point Search
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
Preliminary Test Co-Variances
0 : any Input Resistor and P power supply
2382 : any Input Resistor and N power supply
572 : any Input Resistor and BLR of power supply
3115 : any Input Resistor and any Input Diode
1106 : any Input Resistor and any Threshold
1074 : any Input Resistor and any Output Sum
1386 : any Input Resistor and any Comparator Switching
3126 : any Input Resistor and any Half Efficiency Point Search
8881 : P power supply and N power supply
6820 : P power supply and BLR of power supply
7322 : P power supply and any Input Diode
7586 : P power supply and any Threshold
7295 : P power supply and any Output Sum
8398 : P power supply and any Comparator Switching
9593 : P power supply and any Half Efficiency Point Search
6893 : N power supply and BLR of power supply
7220 : N power supply and any Input Diode
7560 : N power supply and any Threshold
7679 : N power supply and any Output Sum
8493 : N power supply and any Comparator Switching
9348 : N power supply and any Half Efficiency Point Search
6099 : BLR of power supply and any Input Diode
6420 : BLR of power supply and any Threshold
6278 : BLR of power supply and any Output Sum
6876 : BLR of power supply and any Comparator Switching
7162 : BLR of power supply and any Half Efficiency Point Search
6799 : Any input Diode and any Threshold
6517 : Any input Diode and any Output Sum
7324 : Any input Diode and any Comparator Switching
9549 : Any input Diode and any Half Efficiency Point Search
7145 : Any Threshold and any Output Sum
7849 : Any Threshold and any Comparator Switching
8441 : Any Threshold and any Half Efficiency Point Search
8233 : Any Output Sum and any Comparator Switching
8795 : Any Output Sum and any Half Efficiency Point Search
21205 : Any Comparator Switching and any Half Efficiency Point Search
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
Zero Injected Charge
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
~ 5 fC Injected Charge
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
Found Half Efficiency Points
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
Zero Charge Deviations – Worst Channel
from Average
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ATLAS TRT
~5 fC Deviations
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ATLAS TRT
5 fC Channel Offsets
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ATLAS TRT
5 fC Matching After Prelim Cuts
-0.140 V
+0.050 V
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ATLAS TRT
~30 fC Matching After Prelim Cuts
+/- 0.050 V
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
ASDBLR Summary
• 139,000 chips tested
• About 59,000, 53 % pass all cuts
– Except – No tests for shorted test capacitors (see
Mitch’s talk)
– Maybe a few percent more good chips remaining in
“bad” group (tester errors)
• Enough for A / B / C / Barrel plus 10% spare
boards – NO SPARE REPLACEMENT CHIPS
R. Van Berg, Sept. 2, 2004
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ATLAS TRT
S(M)ummary II
• Need to understand / test / etc. shorted test
capacitor effect
• Need to develop bad chip replacement
strategy for board repairs
• Need to sort and pack up chips (still work
for the Exatron and it’s friends)
R. Van Berg, Sept. 2, 2004
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