asdblr & dtmroc testing production run completion
DESCRIPTION
ASDBLR & DTMROC Testing Production Run Completion. Rick Van Berg for Gabe Hare, Mike Reilly. DTMROC Tests. Analog (PMU): I DD DAC outputs Sense inputs (Temp/Voltage) Test pulse outputs Digital: Complete Verilog test suite from Vladimir Analog and Digital tests have been integrated. - PowerPoint PPT PresentationTRANSCRIPT
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R. Van Berg, Sept. 2, 2004 1
ATLAS TRT
ASDBLR & DTMROC TestingProduction Run Completion
Rick Van Bergfor
Gabe Hare, Mike Reilly
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R. Van Berg, Sept. 2, 2004 2
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
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R. Van Berg, Sept. 2, 2004 3
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
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R. Van Berg, Sept. 2, 2004 4
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
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R. Van Berg, Sept. 2, 2004 5
ATLAS TRT
DTM Loss Statistics
Total Tested 35,753
Total Passed 24,912
Failed Digital 7,537
Failed TP Amp 60
Failed TP Delay 4,331
Failed Sense 488
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R. Van Berg, Sept. 2, 2004 6
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
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R. Van Berg, Sept. 2, 2004 7
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
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R. Van Berg, Sept. 2, 2004 8
ATLAS TRT
Input Resistance Cuts
4,273 had at least one input outside of the input Resistance limits of 10,000 – 50,000Ohms
26 44Nominal = 38 kOhms
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R. Van Berg, Sept. 2, 2004 9
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
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R. Van Berg, Sept. 2, 2004 10
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 0.825
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R. Van Berg, Sept. 2, 2004 11
ATLAS TRT
Ternary Output Drive Current
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R. Van Berg, Sept. 2, 2004 12
ATLAS TRTSequential Losses Preliminary Tests
4,273 : Of All Chips Failed Input Resistance Tests10,406 : 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 Tests11,760 : Remaining Chips Failed Output Switching Tests19,684 : Remaining Chips Failed Half Efficiency Point Search
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R. Van Berg, Sept. 2, 2004 13
ATLAS TRT
Preliminary Test Co-Variances 0 : any Input Resistor and P power supply2382 : any Input Resistor and N power supply572 : any Input Resistor and BLR of power supply3115 : any Input Resistor and any Input Diode1106 : any Input Resistor and any Threshold1074 : any Input Resistor and any Output Sum1386 : any Input Resistor and any Comparator Switching3126 : any Input Resistor and any Half Efficiency Point Search8881 : P power supply and N power supply6820 : P power supply and BLR of power supply7322 : P power supply and any Input Diode7586 : P power supply and any Threshold7295 : P power supply and any Output Sum8398 : P power supply and any Comparator Switching9593 : P power supply and any Half Efficiency Point Search6893 : N power supply and BLR of power supply7220 : N power supply and any Input Diode7560 : N power supply and any Threshold7679 : N power supply and any Output Sum8493 : N power supply and any Comparator Switching9348 : N power supply and any Half Efficiency Point Search
6099 : BLR of power supply and any Input Diode6420 : BLR of power supply and any Threshold6278 : BLR of power supply and any Output Sum6876 : BLR of power supply and any Comparator Switching7162 : BLR of power supply and any Half Efficiency Point Search6799 : Any input Diode and any Threshold6517 : Any input Diode and any Output Sum7324 : Any input Diode and any Comparator Switching9549 : Any input Diode and any Half Efficiency Point Search7145 : Any Threshold and any Output Sum7849 : Any Threshold and any Comparator Switching8441 : Any Threshold and any Half Efficiency Point Search8233 : Any Output Sum and any Comparator Switching8795 : Any Output Sum and any Half Efficiency Point Search21205 : Any Comparator Switching and any Half Efficiency Point Search
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R. Van Berg, Sept. 2, 2004 14
ATLAS TRT
Zero Injected Charge
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R. Van Berg, Sept. 2, 2004 15
ATLAS TRT
~ 5 fC Injected Charge
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R. Van Berg, Sept. 2, 2004 16
ATLAS TRT
Found Half Efficiency Points
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R. Van Berg, Sept. 2, 2004 17
ATLAS TRT
Zero Charge Deviations – Worst Channel from Average
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R. Van Berg, Sept. 2, 2004 18
ATLAS TRT
~5 fC Deviations
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R. Van Berg, Sept. 2, 2004 19
ATLAS TRT
5 fC Channel Offsets
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R. Van Berg, Sept. 2, 2004 20
ATLAS TRT
5 fC Matching After Prelim Cuts
+0.050 V-0.140 V
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R. Van Berg, Sept. 2, 2004 21
ATLAS TRT
~30 fC Matching After Prelim Cuts
+/- 0.050 V
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R. Van Berg, Sept. 2, 2004 22
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
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R. Van Berg, Sept. 2, 2004 23
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)