Transcript AMICSA2008 - ESA Microelectronics Section

A NEW GENERATION OF RAD HARDENED ADC TO SERVE
THE SPACE INDUSTRY
International Workshop on Analog and Mixed Signal Integrated Circuits
for Space Applications (AMICSA 2008)
JP Amblard
( [email protected] )
(+ e2v design & project teams)
September 1st 2008
September 1st 2008 - e2v AMICSA
Presentation Plan
 A few words about e2v
 Space Context
 ADC Specification & Challenges
 Radiation & Reliability
 ADC Architecture overview
 Packaging
 Project summary
AMICSA 2008 e2v
2
A few words about e2v…
Operations
 Headquarter Chelmsford, England
Lincoln
Chelmsford
 Additional design, development &
manufacturing facilities in
Corcelles (Switzerland), Grenoble
(France), Lincoln (UK), High
Wycombe (UK) and assembly
facilities in Mexico.
High Wycombe
 1800 employees
600 engineers and scientists
 Sales & support offices in the USA,
Germany, France, Hong Kong
 Global network of distributors and
Corcelles
Grenoble
representatives
AMICSA 2008 e2v
3
A few words about e2v…
Business overview
 Semiconductors and sensors
 Broadband data converters & microprocessors for
avionics, Space, Defense, Telecom, Instrumentation
 Electronic tubes
 Thyratrons, magnetrons and compact
modulators for medical radiotherapy
 CCDs and CMOS sensors and cameras for space and
 IOTs, Inductive Output Tubes + the Energy
astronomical, medical, scientific, defence (incl.
L3Vision™) and industrial process control
Saving IOT (ESCIOT®). and thyratrons for
UHF digital television transmitters
 Mixed signal ASICs for Industrial and Automotive Sensors  Gridded tubes & thyratrons for Industrial heat
treatment, welding & industrial laser drivers
 Thermal imaging cameras for fire and rescue
 Magnetrons (and receiver, receiver/protector
 Microwave alarms, diodes, VCOs, air quality sensors,
image sensors and custom ICs for automotive systems
 Gas sensors for environmental safety
 X Ray detectors for x-ray spectroscopy
systems) for commercial, defence and
marine radar
 TWTs (Traveling Wave Tubes) for defence
electronic countermeasures
 TWT based satellite amplifiers
AMICSA 2008 e2v
4
Fast, Low power Broadband ADC’s in
Space context
 Most of the telecommunication payloads will be digitally processed
 Satellite telecommunications will make use of complex multi-beam antennas
carrying larger useful bandwidths
 Optimizing the use of scarce spectrum is mandatory
 Best operational flexibility is needed by operators and end-customers for all
sort of new services
 For systems designed in a tough competitive context, the European Space
industry requires advanced components in terms of functional performance, low
power consumption and radiation-hardening
 Fast, Low Power, Broadband ADCs are key enabling
strategic components
AMICSA 2008 e2v
5
Strategic Low-Power Broadband
10b/1.5G ADC developed by e2v
 e2v has been awarded a major contract
by the European Space Agency (ESA)
to develop a strategic component, 10-bit 1.5 Gsps Low Power ADC
 e2v track records in “State of the Art” ADC’s (example)
 10b 2.2Gsps World’s fastest single core ADC
 12b 500M ADC EE Times Ultimate Analog Product Award 2007
 Quad 8b 5G versatile Quadruple ADC
AMICSA 2008 e2v
6
the Strategic Low-Power Broadband
10b/1.5G ADC developed by e2v
 Key assets of the 10b 1.5GSps ADC:
 superior linearity
 wide analogue input bandwidth - operation up to LBand
 very flat spectral response
 Low Power
 DMUX’ed output
 European high speed fully bipolar SiGe technology
 Space level reliability & radiation hardening to ensure operation under
extreme conditions
 Partnership with end-users TAS & EADS Astrium
The project team is at work for a winning solution
AMICSA 2008 e2v
7
the ADC 10b /1.5GSps
Dynamic Performances Beyond specifications
ESA Target
Specification
Parameter
Physical bits
1.5GSps
Input bandwidth
 1.5GHz
NPR
Comments /objectives e2v
10
Sampling rate
SFDR
Conditions
Objective  3GHz to support L Band
 60 dBFS
1st Nyquist
 45 dB
1st
Excellent linearity over useful bandwidth
Nyquist
Clock Related Spurs well below SFDR
ENOB
 8.5 bit
1st Nyquist
Gain flatness
 0.5dB
 3.0 dB
DC to 0.75GHz input
>0.75 GHz - 1.5 GHz
Very flat response over the full L Band,
<0.5dB 1.5GHz/ <1dB  1.8GHz
1Vpp
Full-Scale
Differential
trade-off ADC drivability & SNR
1W (no L Band)
1:2 DMUX / LVDS
output swing
Power to be optimized for LBand
Swing Adjust function to save power
Analogue input
Power
consumption
AMICSA 2008 e2v
8
the ADC integrates relevant features
for system manufacturers
ADC gain adjust
Offset Error Adjustment
Sampling Delay adjust (SDA)
Swing Adjust function
Digital output
Demux option
Testability
Power supplies
Package
Qualification temperature range
Adjustment in the range 0.9 to 1.1
ADC Offset can be tuned to middle code = 512
to fine tune the sampling ADC aperture delay TAD
around its nominal value
reduce output swing when output transmission
conditions are favourable - Save Power
selectable 1:1 / 1:2 / 1:4
Unused ports powered off
Pattern generator
5.2V, 3,3V; 2,5V
Ceramic CICGA 255
-55°C / +125°C
AMICSA 2008 e2v
9
Radiation & Reliability
Main figures
 ADC designed in B7HF200 SiGeC from Infineon derived from B7HF
 fastest European technology (fT >200GHz)
 excellent & reliable modelling for simulation of performances
 proven reliability on existing ADC & current version of 10b/2.2G in B7HF200
 Full bipolar design ensures the high level of radiation hardening
 Key Target values
Useful life tB
Early failure rate
Radiation total dose
Latch up free
20 years
20 dpm / 1000h
100 Krad (Si)
Up to 80 MeV-cm²/mg
AMICSA 2008 e2v
10
Architecture overview
Folding/interpolation
Low latency
BIST
PGEN
DECN
SDAEN
SDA
CLK
CLKN
100Ω
Timing
VIN
100Ω
VINN
S/H
Logic Block
linearity and noise characteristics
 determines ADC input bandwidth and
band flatness
Quantizer
 it needs to feature the requested HF
Demultiplexer
1:1 or
1:2 or
1:4
LVDS Buffers
ADC
100Ω
DMUX Reset
 T/H front-end stage is a critical part of
RST
RSTN
ADC Data Ready Reset
 Broadband ADC Architectures based on:
 fast accurate front-end Track & Hold,
 followed by fast settling Core ADCs
featuring DC accuracy & low latency
10
DA0..DA9
DA0N..DA9N
10
DB0..DB9
DB0N..DB9N
10
DC0..DC9
DC0N..DC9N
10
DD0..DD9
DD0N..DD9N
 Low Power come from innovative
architecture and fine optimization
2
DR..DRN
GA
 All key points where e2v unique
world-class design and system
expertise in fast broadband accurate
ADC’s are major assets
OA
RS0,RS1
S
A
AMICSA 2008 e2v
11
ADC Packaging
 Package for the ADC 10b/1.5GSps w/ DMUX 1:4
 Baseline
 Ceramic package CICGA
 Size 21X21mm² / Pin count: 255
 Optimized for ADC dynamic
and thermal performances for Space applications
 Minimal and predictable impact of package on ADC performances
 Size in accordance with end-users needs
 Compliant with Space level requirements
 Package Modelling
 extract models of the ADC package accesses,
in particular the most critical ones, analogue input, clock input, data outputs
 Thermal behaviour
 ADC Layout division into elementary cells with estimated power consumption
 Identification of the Hot Spots & critical temperature gradients, if any
 Layout correction if necessary
AMICSA 2008 e2v
12
Summary of the 10b 1.5GSps ADC
development project
 Objective
 to serve the Space industry with a state-of-the-art Broadband 10b/1.5GSps ADC
 stay ahead competition as complex digitally processed payloads become more common place.
 Key advantages of the ADC
 High Dynamic Performances in full L band
 Low power
 Space level reliability
 Radiation Hardened
 European sourcing
 Challenges for which e2v has key expertise
 fine trade-offs between low power and high-end performances
 anticipation of main matters
 performance level over temperature range
 Radiation
 Reliability
 Packaging
 Timeframe
 Prototypes in Q3/2009
 Space Level Qualification 2010
AMICSA 2008 e2v
13
International Workshop on
Analog and Mixed Signal Integrated Circuits
for Space Applications (AMICSA 2008)
Thank you for your attention
Questions?
[email protected]
AMICSA 2008 e2v
14