Channel control ASIC for the CMS hadron calorimeter front end readout module Page: 4 of 4
This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided to Digital Library by the UNT Libraries Government Documents Department.
The following text was automatically extracted from the image on this page using optical character recognition software:
RBX CLK BX Bus Interface
RBX DATA RBXPwmfl,,
is sat by 6
on PC board
BC ZERO Buchl Counoter
'dI~s QIEMANTa 5"
QIEQ XP b 2
Control Regtster Spoce
Control Aegister ENQIERANGE
_ata_ (8dfRnt Q ANGE 2
- - - - Alsgmeot
- - Regtust PEDDACa 4
Pedestal DAC pEDDACb 4
DLLTa, Selc - I 2
Regiser QIEb CLR mu
- Tears- QlEC CLRC mu
MtRegis s >oC
Tnbes pax TQtlu sE
C H CLaOr ER
SHdFl Fae CZero TIET
B7c Con E- USEba
Enable Tersble tesa . agEe
S~ P U* S END
BnhCopunt ek NRL ,
Data DEAA 1SgAlTA
Figure 10: CCA complete block diagram
III. PRODUCTION PARTS
The CCA was produced in the Agilent 0.5 micron CMOS
process. The die, which is shown in Figure 11, is 3.4 mm x
A production run of 11,400 parts (22,800 channels) has
been completed. The part is packaged in a 128 pin QFP that
is 14 mm x 20 mm.
IV. TEST RESULTS
An initial lot of 500 CCA chips were packaged to check
chip yield. An automated test set-up was developed to test the
parts. Twenty-one separate measurements were made looking
at such things current draw, writing and reading registers,
functionality of all signals, and the programmed time delay
for the QIE clocks. Initial measurements were made on 200
parts to establish cuts for the current draw (+/- 15%)and delay
variations (+/- 2 nsec). After adding cuts to the test program,
227 chips were tested. Of those parts, 222 were found to be
good for a yield of 97.8%. It is planned to package and test
the remaining 10,900 parts in the near future.
The design of the Channel Control ASIC for the CMS
hadron Calorimeter has been completed and a production
quantity of devices has been fabricated. The CCA has been
tested with QIEs and meets all of the requirements for the
CMS application. Preliminary testing of the packaged parts
indicates a very high yield.
The authors wish to thank C. Gingu and W. Wester in the
ASIC test group at Fermilab for the chip yield information.
We also wish to thank J. Hoff and A. Shenai for layout
assistance and A. Dyer for his test assembly help. We wish
to thank A. Mekkaoui for his significant contributions
throughout the development of the CCA.
1) Theresa Shaw, et.al., "Specification for the CMS Hadron
Calorimeter Front End Readout Module Channel Control
ASIC", Revised March 8, 2002.
2) M. Liu, S. Whitaker, "Low Power SEU Immune CMOS
Memory Circuits", IEEE Transactions on Nuclear Science,
Vol. 39, No. 6, pp. 1679-1684, December 1992.
Figure 11: CCA die
This article can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Article.
al., Ray Yarema et. Channel control ASIC for the CMS hadron calorimeter front end readout module, article, September 26, 2002; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc742967/m1/4/: accessed November 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.