bepicolombo/mmo/pwi/sorbet pwi meeting - kanazawa 24/03/2006m.dekkali mmo pwi meeting kanazawa...

BepiColombo/MMO/PWI/SORBET

PWI meeting - Kanazawa 24/03/2006 M.Dekkali

MMO PWI Meeting

Kanazawa University24th March 2006



SORBET instrument overview

S ea rch C o il D B

to /fr o m

D P U

+ E x

-E x

+ E y

F P G A

A G C

A G C

P A

P A

P A

1 0 k-4 0k

2 .5 k-1 0 k

1 6 0 k-64 0 k

4 0 k-1 60 k

1 0 k-4 0k

2 .5 k-1 0 k

1 6 0 k-64 0 k

4 0 k-1 60 k

R O M

-E yP A

S O R B E TIn stru m en t

+

-

+

-

C a l

C a l

C a l

Bz

T N R (T h erm a l N o ise R ece iver )

IF F ilter2 1 .4 2 5 M

L O2 1 .2 8 5 M

S y n th2 1 .9 2 5 M3 1 .6 2 5 M

H F R (H ig h F req u en cy R ece iver )D ig ita l

u n it

+

-

A D C

V r ef

V r ef

+

-



Analogue front end status

Design of a simplified BBM including the main functionalities of the receiver– 2 channels receiver using discrete and ASIC technology on the same PCB board– Technical evaluation of the both options (discrete and integrated)– Functional testing has been done and show the ASIC feasibility– Performances are better using the ASIC– The ASIC will greatly help to minimize the power budget (at least –300mW)

Still to be done– Thermal and radiation evaluation (2Q/2006)– Confirmation (or not) of the ASIC option (3Q/2006)– ASIC in its final configuration – 3rd version (4Q/2006)– BBM including all the functionalities of SORBET (4Q/2006)– Qualification of the last ASIC version (2007)



New ASIC design (January 2006)

Analogue functions on a single chip :– Specific for SORBET (Full Custom design)– Thin CMOS technology (AMS 0.35um)– Logarithmic amplifiers (AGC)– Low noise mixers– Selective band-pass filter– Low noise operational amplifier

Functional testing showed :– Measurements and simulations match very well– Improvement of the AGC dynamic range– AGC response less linear but still acceptable– Reduction of the power consumption

Future actions– Thermal testing (soon)– Radiation evaluation (2Q/2006)– Decision to continue the ASIC solution (3Q/2006)

2.6mm

2.6mm

ELISA_0110/14 2.5V

Vref (3.5V)

AOP

In+ In-

IBIAS

Out

Clock driver

Clk_In

p_Clk

n_Clk

Mixer_1

Mixer_2

1

245 10

8

7

6

11121314 17 18

1921 25

2930

31

33

34

36 37 38 39 4042

IBIAS

RF-

RF+

OL+OL-

IF+

IF-

IBIAS

IF+

RF-

RF+

LO+LO-

IF-

AGC_1 Out

In

V CM

V AGC

IBIAS+

IBIAS -

V REF

R FBK

AGC_2Out

In

V CMV AGC

R FBK

IBIAS+

IBIAS -

V REF

4445

46

47

Band-Pass

SC-Filter

IBIAS

In Com

Out

p_Phi

n_Phi

Amp+

-

Amp-

+

M ix_Bias

IF_O

ut1

LO

1+

LO

1 -

RF1+

RF1 -

AG

C_O

ut1

Rfb

k1

Vc1

Vcm

1

AG

C_I

n1

Fil

t_O

ut

Fil

t_B

ias

AO

P_I

n+

AO

P_I

n -

AOP_Out

Fil

t_C

lk

Fil

t_C

om

Fil

t_In

AG

C_B

ias

-

Vcm

2

AG

C_I

n2

Vc2

Rfb

k2

AG

C_B

ias+

RF2+

RF2 -

LO

2+

LO

2 -

AG

C_O

ut2

IF_O

ut2



Analogue front end test bench

Test bench for analogue purposes :– 2 channels acquisition module– User I/F – BuilderC++ environment– Receiver setup– Stimuli control– GPIB and USB Interfaces– Data acquisition and storage– Graphic display– Manual and automatic tests (scripts)

BBM mixte(ASIC/Discret)

Acquisition

EGSE µ-controller

ATMega-128

ADC_1

ADC_2

USBI/F

Port 24 I/O

USB ASICunder test

Control/Commands

Functiongenerator

Pragamm ableattenuator

GPIB Plot of the receiver response as afunction of the input level or thefrequency



Radiation testing plan

Preliminary radiation tests for an early evaluation of the ASIC technology

Objectives :– Early detection of possible failures– Evaluation of the technology limits regarding the SEL and the TID– Make a decision about the ASIC option

Latch-up tests :– Tests on 1 ASIC sample powered ON– Heavy ions beam at Louvain (Belgium)– Monitoring of the power supply for latch-up detection

Total dose tests :– 7 ASIC under radiation (5 ON + 2 OFF) + 1 sample for control– CO-60 source up to 100kRad (testing facilities still TBD)– Anneling (ASIC ON @100°C during 160H) and final tests

Applicable documents :– ESA/SCC specification N°25100 (for SEL) and N°22900 (for TID)– Radiation testing plan (TBW)



Digital Unit : hardware

First BBM design (still under development) :– A6 size daughter board– Re-programmable 2 millions gates FPGA (XILINX)– 128KB low power Honeywell SRAM (+128KB option)– 64KB EEPROM– SpaceWire interfaces (2.5V and 3.3V transceivers) – 2 channels S&H + ADC (AD9225 or HMXADC9225)– Local 1.5V / 2.5V voltage regulator– External 3.3V / 5V / ±12V– Testing connectors : 48 logic analyzer channels, RS232 DSU for LEON



Digital Unit : FPGA design

Low power processor :– Leon 2 LGPL : control, commands, DSP, data compression

Configuration: 1KB dcache, 1KB icache, MAC16x16, DSU, 32 interrupts controler=> Solution for SEU-free: LEON2FT? LEON3FT?

– Spw-b-2.0 (ESTEC) mapped in IO area: MDP communicationConfiguration: SysClock=3MHz, SlowClock=10MHz, SDR, 32 FCT

– Pseudo random noise : internal calibration

– ADC module : sampling sequences, data buffering

– Analog setup module : receiver configuration

– Synthesizer controller : to be written

FPGA : RTAX-S

ADC(12 b its)

ROM

Synthesized processor (LEON)contro l / com m ands

signal processingdata s tream form at

RAM FIFO

Pseudo-randomnoise generator

(up to 10M H z)SpaceW ire link

Instrum entsetup

O nflightca libration

D PU /SorbetIn terface

C h 1 C h2



Digital Unit : development tools– FPGA tool chain :

Windows (Actel) and Linux Redhat (Xilinx)– External/Internal logic analyzers :

HP16900/ChipscopePro– Software development tools :

Eclipse + CDT + GRMON evaluation / sparc-elf-gcc / ddd– SpaceWire tools :

USB-brick (2 ports through USB)Java tests application (Dundee)



Interfaces with PWI

I/F update :– 3cm slot in the MDP chassis– Confirmation of the analogue +5V– DC-DC converters switching frequency– Shield between the PSU and others PWI instruments– Grounding to the MDP chassis– Connection between sensors and instruments

Other :– Energy distribution of the particles at Mercury

+

-+

-+

-

EWO side

SORBETside

M D P c h a ss is g ro u n d

E W O s ig n a l g ro u n d S O R B E T s ig n a l g ro u n d



Power supply budget (TBC)

Bus Power------------------------------------------+12V 0mW

-12V 100mW

+5V 700mW

-5V 0mW (TBC)

+3.3V 450mW------------------------------------------

Total 1250 mW

bepicolombo/mmo/pwi/sorbet pwi meeting - kanazawa 24/03/2006m.dekkali mmo pwi meeting kanazawa...

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