Evaluation of a 10-bit 2.2 Gsps ADC for Space - Microelectronics

33 Pages·2006·3.58 MB·English

Evaluation of a 10-bit 2.2 Gsps ADC for Space Applications
D. Bellin
October, 3rd 2006
J. Bellefet (e2v)
C. Carmona (e2v)
F. Malou (CNES)
P. Ribeiro (TRAD)
Outline
(cid:1) e2v grenoble presentation
(cid:1) Overview of 10-bit 2.2 Gsps AT84AS008 ADC
(cid:1) Architecture and Process
(cid:1) Package description
(cid:1) Space Evaluation with CNES
(cid:2) Electrical characterization
(cid:2) ESD tests
(cid:2) Package tests (mechanical, thermal and reflow)
(cid:2) Quality and reliability tests
(cid:1) Radiation tests
(cid:2) Total dose tests
(cid:2) Heavy ions tests
(cid:1) Radiation assessment of AT84CS001 DEMUX (companion chip)
(cid:2) Total dose tests
(cid:2) SEL tests
(cid:1) Conclusion
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1- Overview of e2v Grenoble
(cid:1) Atmel Grenoble became e2v grenoble starting August 1st, 2006
(cid:2) Atmel motivation : to focus on its core technologies
(cid:2) e2v motivation :
very good strategic fit (cid:1) ®
(cid:220)
Grenoble
e2v grenoble
will allow to extend markets with broader range of products
(cid:220)
(cid:1)In-house skills cover all aspects of:
(cid:2) Design
(cid:2) Electrical characterization
(cid:2) Package design / thermal modelling
(cid:2) Assembly
(cid:2) Test
(cid:2) Burn-in
(cid:2) All tasks required by space level production
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2- Overview of 10-bit 2.2 Gsps AT84AS008 ADC
(cid:1) 10-bit 2.2 Gsps ADC
(cid:2) 8 bit ENOB at 1.7 Gsps in 1st Nyquist
(cid:2) 7.7 bit ENOB at 2.2 Gsps in 1st Nyquist
(cid:2) SFDR = –54 dBc / SNR = 50 dB at 2.2 Gsps
(cid:2) 3.3 GHz input bandwidth
(cid:1)
performances are flat over the full 1st Nyquist zone.
(cid:2) Same features than previous TS83102G0B 10-bit 2 Gsps ADC:
AT84AS008 is fully pin-to-pin compatible with TS83102G0B ADC
(cid:220)
Performance improvements are significant
(cid:220)
(cid:3) better SNR and ENOB performances above Fin = 1 GHz
(cid:3) flatter spectrally ‘pure’ FFT response throughout 1st and 2nd Nyquist.
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3- Architecture of AT84AS008 ADC
(cid:1) Track/Hold
(cid:1) Analog quantizer (folding & interpolation)
(cid:1) Regeneration of analog residues into logical levels
(cid:1) Synchronization stage before output buffers
(cid:1) Fully differential architecture

PGEB B/GB
OR
ORB
Track & Hold
r D9
e
VIN ntiz D9B
a
50 u Logic block
Q
50 g
VINB o
al D0
n D0B
A
DR
GA DRB
CLK
50 SDA Clock generation
50
CLKB
SDA DECB/ DRRB
DIODE
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4- Process of AT84AS008 ADC
(cid:2)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:3)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:1)(cid:4)
(cid:1) AT84AS008 is designed on a SiGe process
(cid:2) INFINEON process (Germany)
(cid:2) 75 GHz cut-off frequency
(cid:2) High voltage NPN bipolar transistors
(cid:2) 3 layers AlCu metallization
(cid:2) Only vertical transistors and poly resistors
to be rad tolerant
(cid:2) Insulation concept: LOCOS and deep trench
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5- Package description (1/4)
(cid:1) High Reliability Hermetic Ceramic cavity down package (CI-CGA152)
(cid:1) Solder Column Interposer (SCI) for good resistance to temperature cycling
(cid:1) Column finish is Sn10Pb90
(cid:1) Good thermal dissipation by columns
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5- Package description (2/4)
(cid:1)The die is directly attached to the CuW heatspreader
Combo lidsoldered
0.27 mm sq
0.254mm thick
High T°solder columns
(Pb90Sn10)
152 columnsin 3 externalrows
minus 4 corners
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5- Package description (3/4)
(cid:1)Thermal simulation results of Rth from junction to bottom of columns
(cid:5)(cid:6)(cid:7) (cid:19)(cid:1)(cid:20)(cid:21)(cid:22)(cid:23)(cid:4)(cid:24)(cid:25)
(cid:8)(cid:1)(cid:9) (cid:10)(cid:11)(cid:6)(cid:6)(cid:11)(cid:12) (cid:11)(cid:13)(cid:1)(cid:14)(cid:11)(cid:15)(cid:16)(cid:12)(cid:17)(cid:18)
Hypothesisusedfor ANSYS
simulations :
Body 21 x 21 mm 1.55 mm thick
glue 0.050 mm
Die 3.8 x 3.8 mm2 380 umthick
heatingzone : 1.9 x 1.9 mm2 1 watt
Infiniteheatsinkatbottomof
columns
No externalheatsinkon top.
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5- Package description (4/4)
(cid:1) Simplified thermal network of CI-CGA152 package
SSIIMMPPLLIIFFIIEEDD TTHHEERRMMAALL MMOODDEELL FFOORR 115522 CCII--CCGGAA
TTyyppiiccaall vvaalluueess,, wwiitthh aassssuummppttiioonn ooff uunniiffoorrmm ppoowweerr ddiissssiippaattiioonn oovveerr 2255%% ooff ddiiee ttoopp ssuurrffaaccee..
SSiilliiccoonn JJuunnccttiioonn SSiilliiccoonn JJuunnccttiioonn CCaassee wweerree aallll BBoottttoomm ooff CCoolluummnnss
aarree ccoonnnneecctteedd ttoo iinnffiinniittee hheeaattssiinnkk aatt bboottttoomm
SSiilliiccoonn DDiiee aanndd nnoo eexxtteerrnnaall hheeaattssiinnkk oonn ttoopp ::
1144..44 mmmm22 00..8800 °°CC//WWaatttt 00..8800
== 00..9955 WW//ccmm//°°CC
EEppooxxyy//AAgg gglluuee
33..00 °°CC//WWaatttt 33..00 RReedduuccttiioonn
== 00..0022 WW//ccmm//°°CC
((RReessuulltt uussiinngg SSPPIICCEE,, tthheerrmmaall ttoo
CCuuWW hheeaattsspprreeaaddeerr 00..2255 °°CC//WWaatttt 00..2255 eelleeccttrriiccaall eeqquuiivvaalleenntt mmooddeell))
== 22..33 WW//ccmm//°°CC
TToo eexxtteerrTTnnooaa lleexxtteerrnnaall
00..2255 °°CC//00WW..22aa55tttt °°CC//00WW00....22aa5555tttt °°CC//WWhhaaeettttaattssiinnkkhh iieeff aaaattnnssyyiinnkk iiff aannyy
CCuuWW hheeaattsspprreeaaddeerr
11..77 °°CC//WW11aa..77tttt °°CC//WW11aa..77tttt °°CC//WWaatttt 11..77 SSiilliiccoonn
== 22..33 WW//ccmm//°°CC
JJuunnccttiioonn
CCeerraammiicc ppaacckkaaggee 00..66 °°CC//WWaatttt
== 00..1177 WW//ccmm//°°CC 00..66
00..55°°CC//WWaatttt 00..99°°CC//WWaatttt 00..55 00..99
CCeerraammiicc 00..5566 00..4477 00..4444 77..44 °°CC//WWaatttt
°°CC//WWaatttt °°CC//WWaatttt °°CC//WWaatttt
22..6611 22..2222 22..0044
ccoolluummnnss PPbbSSnn 22..0055 11..7755 11..6600
== 00..4400 WW//ccmm//°°CC °°CC//WWaatttt °°CC//WWaatttt °°CC//WWaatttt
BBoottttoomm ooff 4444 BBoottttoomm ooff 5522 BBoottttoomm IInnffiinniittee hheeaattssiinnkk IInnffiinniittee hheeaattssiinnkk
iinntteerrnnaall ccoolluummnnss ""bbeettwweeeenn"" ccoolluummnnss ooff 5566 aatt bboottttoomm ooff ccoolluummnnss aatt bboottttoomm ooff ccoolluummnnss
AAssssuummppttiioonnss :: eexxtteerrnnaall ccoolluummnnss
DDiiee 33..7755xx33..8844==1144..44 mmmm22,,
5500 µµmm tthhiicckkEEppooxxyy//AAgg gglluuee,,
PPbb9900SSnn1100 ccoolluummnnss ddiiaammeetteerr 00..8866 mmmm
22..11 mmmm lleennggtthh uunnddeerr bboottttoomm ooff LLGGAA,,
2211xx2211 mmmm CCLLGGAA..
1188..55xx1188..55 mmmm CCuuWW oonn ttoopp BBoottttoomm vviieeww
©e2v technologies plc October, 3rd2006 /AMISCA 10