1 st AMICSA Workshop – 2 & 3 October Evaluation of a 12 bits Video Processor for Space Application J.-Y. Seyler, F. Malou, G. Villalon ( CNES, Toulouse - France )

2 1 st AMICSA Workshop – 2 & 3 October 2006 Presentation Plan :  The Context  The Purpose  You said « CSP » ???  CSP Functions  Preliminary Tests  Preliminary Selection  From 5 to 3 candidates  Characterization Principle  Measurements Results  1 possible candidate  Complementary Tests  “ Lot Evaluation ” Tests  Quality, Reliability & Radiations Evaluation  Electrical Tests  Radiations Validation

3 1 st AMICSA Workshop – 2 & 3 October 2006 Context (1/2) :  In space applications, analog electronics for CCD signals processing uses usually specifically designed devices such as : Asics or Hybrid Circuits... Today : Performances needs are increasing  ( maximum pixel frequency, linearity, noise... ) While the mean power consumption should be decreased  CMOS CCD Signal Processor  So, commercial CMOS CCD Signal Processor ( CSP ) are a possible solution to cope with all these constraints.

4 1 st AMICSA Workshop – 2 & 3 October 2006 Context (2/2) :  In the last years, low power CMOS CSP where introduced on the market for wide diffusion applications ( digital imaging, video, … ).  BUT : according to their incomplete datasheets it is not possible to accept those devices in a space payloads without complementary measurements !  Measurements objectives : With a specifically developed electronic bench, characterization : of Critical Parameters ( linearity, noise ) and Sensibility to Environmental Influence.

5 1 st AMICSA Workshop – 2 & 3 October 2006 Video Processors CSPAFE In order to optimise the performance of the electronics of video equipments, we have tested several “ Video Processors ” ( or CSP = “ CCD Signal Processor ” or AFE = “ Analog Front End ” ). 1.PRELIMINARY TESTS : These tests were based on : Latchup sensitivity Electrical performances ( some tests at several temperatures )  They have then allowed to select one possible candidate. 2.LOT EVALUATION TESTS : So, we have bought several parts from the same lot ( 2 sub-lots ) and performed a “ Lot Evaluation ” : Lot Qualification ( “ COTS ” philosophy ) Radiation sensitivity ( Latchup, Total Dose, Single Event Upset ) Purpose :

6 1 st AMICSA Workshop – 2 & 3 October 2006 You said : “ CSP ” ??? : The Analog Video Signal Processing The CSP Function

7 1 st AMICSA Workshop – 2 & 3 October 2006 Analog Video Signal Processing :  1 single consumer “ Off-the-shelf ” electronics component may replace several functions Video Chain DetectorDetector Analog Processing Electronics Analog to Digital Conversion Detector Implementation Electronics Timing Generator Power Supply Interface to Digital Devices N bits CCD PROCESSOR Photons

8 1 st AMICSA Workshop – 2 & 3 October 2006 You said « CSP » ??? What is an CSP, « CCD Signal Processor » ?  It is a Integrated Circuit which is usually composed of the following elements : –Input DC value compensation ( Clamp ), –Correlated Double Sampling ( CDS ), –Signal scaling by Variable Gain Amplifier ( VGA ), –Analog to Digital Converter ( ADC ), –Offset Calibration Loop based on Dark Pixels. –Additional functions : DAC, auxiliary A / D…

9 1 st AMICSA Workshop – 2 & 3 October 2006 CSP Functions :

10 1 st AMICSA Workshop – 2 & 3 October 2006 Preliminary Selection : Latch-Up sensitivity Test Electrical Characterization Selection Criteria

11 1 st AMICSA Workshop – 2 & 3 October 2006 Preliminary Selection : Latch-Up sensitivity Test ( CNES Quality Dep t ) : –Bibliographic survey –Elimination of several fab-less candidates  5 types among 2 manufacturers –Latch-up tests  3 candidates among 2 manufacturers Full Electrical Characterization : –Inter-calibration with other bench ( on 1 part already tested ) –Tests SODERN )  1 only candidate left

12 1 st AMICSA Workshop – 2 & 3 October 2006 Criteria & Selected CSPs : Our need : 1 Channel only, Resolution = 12 bits, 20 MSamples / Second Offset calibration loop ( based on dark pixels ) Programmable Gain : ~ 0  40 dB.  We have eventually selected 3 CSPs : Candidate 1 ( Analog Devices ): 70 mW Candidate 2 ( Texas Instruments ): 80 mW Candidate 3 ( Texas Instruments ): 75 mW, Low Latchup sensitivity

13 1 st AMICSA Workshop – 2 & 3 October 2006 SEL Sensitivity / LET :

14 1 st AMICSA Workshop – 2 & 3 October 2006 Preliminary Tests : Test Bench presentation General Performances of the CSP Complementary tests of the candidate Thermal Characterization & Radiation Tests

15 1 st AMICSA Workshop – 2 & 3 October 2006 Characterization Principle :

16 1 st AMICSA Workshop – 2 & 3 October 2006 Bench : Video stimuli waveform Performances : 9.25 Mhz maxi pixel frequency Better than +/- 2 LSB (12) integ. linearity Benchmark and Evaluation Board

17 1 st AMICSA Workshop – 2 & 3 October 2006 General Performances of the CSP : Differential Non Linearity Integral Non Linearity Noise Performance

18 1 st AMICSA Workshop – 2 & 3 October 2006 Differential Non Linearity Performance :

19 1 st AMICSA Workshop – 2 & 3 October 2006 Integral Non Linearity Performance :

20 1 st AMICSA Workshop – 2 & 3 October 2006 Noise Performance :

21 1 st AMICSA Workshop – 2 & 3 October 2006 Measurements Results : Differential Non Linearity performance Integral Non Linearity performance Noise performance Comparison versus “ Space application ” requirements :  Compatible with high performances applications  … but with complementary measurements !

22 1 st AMICSA Workshop – 2 & 3 October 2006 Complementary Tests : Complementary Electrical Tests Total Dose Tests

23 1 st AMICSA Workshop – 2 & 3 October 2006 Complementary Tests (1/3) : Complementary Electrical Tests : –Some additional electrical tests room temp ) –Tests at : - 20 °C, + 25 °C, + 70 °C Total Dose Tests :  Some concerns about dose rate ( “ Rebound Effect ” ? ) CSP

24 1 st AMICSA Workshop – 2 & 3 October 2006 –Electrical Tests made at ambient temperature, and related with project specifications : Pleiades Satellites needs + Specific tests for next projects ( “ Post Pleiades ” & Scientific Payloads ) : –Large Reset peak –Saturated pixel –Clamp efficiency ( V_ref influence for V_util = V_ref = C t ) –Offset correction Complementary Tests (2/3) :

25 1 st AMICSA Workshop – 2 & 3 October 2006 Complementary Tests (3/3) :

26 1 st AMICSA Workshop – 2 & 3 October 2006 Lot Evaluation : Quality, Reliability Electrical Tests Radiations Validation

27 1 st AMICSA Workshop – 2 & 3 October 2006 The Future : “ Lot Evaluation ” (at CNES) Procurement of “ Commercial Quality Level ” & “ Extended ” Temperature Range ( -20°,+85°C ) Purpose :  Quality, Reliability & Radiations Evaluation

28 1 st AMICSA Workshop – 2 & 3 October 2006 Quality, Reliability & Radiations Evaluation Procurement750P – DC P – DC044 Construction Analysis Radiation Test : TID + SEU 11P TID + 5P SEU DC0501 Performance Characterization 6P DC0440 Serialization Electrical Characterization -40°C/–20°C / +25°C / +75°C/+125°C Life Test10P Electrical Measurement -40°C/+25°C/+125°C DPA Final Report 6P DC P DC P DC0501 1P Reference3P

29 1 st AMICSA Workshop – 2 & 3 October 2006 Specific Test Bench : CNES Qual. laboratory for : Biasing the component ( Stimuli Generation ) Static & Dynamic performances. FPGA delivers different digital stimuli which are transferred through a 16bits Digital to Analog Converter at the input of the CSP. The EXA3000 ( ATE ) tester ensures the control signals generation, the data reception and the processing ( parameters extraction ) FPGA Ramp CCD Format DAC 16 bits 1 > f > 600 MSPS CSP under TEST EXA3000 DNL, INL Extraction Functional Characterization : AC DC D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Din Pin 8 Bits DAC

30 1 st AMICSA Workshop – 2 & 3 October 2006 Electrical Tests : Up rating / Electrical characterization at 5 temp. : - 20 °C / + 25 °C / + 75 °C  conformity with the manufacturer’s datasheet - 40 °C & °C  possibility of temperature range extension ? Dynamic Life Test (10 parts) : –2000 hours, –T = 125 °C, –Vcc = 3.3 V –Intermediate electrical measurement : 168 h, 500 h, 1000 Tamb = 25 °C with F = 15 Msps. –The final measurement will be done at 3 temperatures. –Final DPA Construction Analysis ( 6 parts ) :  Identify & describe the Front-End and Back-End technologies.

31 1 st AMICSA Workshop – 2 & 3 October 2006 Radiations Validation : Total Ionizing Dose : –11 parts ( 8 On, 2 Off, 1 Ref. ) with ONERA DESP Cobalt60 Source –Total Dose : 15Krad ( Si ) & 30Krad ( 2 lots 30 rad / h –Low Dose Rate ( because of the “Rebound Effect” found after 14 krads in previous TID test ) –Annealing : 24 h / 25 °C h / 100 °C All the datasheet parameters : measured at ambient temperature & 15 Msps. Heavy Ions Tests : –Previous tests showed that the CSP is not sensitive to Single Event Latch-up for a LET of 60 MeV / mg. cm ² –Single Event Effect ( Transient, Upset or Functional Interrupt ) –UCL ( Belgium ) heavy ions facilities + specific test bench ( stimuli, count, record events ) with TRAD support.

32 1 st AMICSA Workshop – 2 & 3 October 2006 Conclusion : At the end of the validation of the lot (beginning 2007), we will be able to answer to the question :  “ Is our selected CSP, coming from commercial procurement recommended for usage in our spaceflight applications ??? ”