cobham microwave · z=rs+lp.ω 7 diodes bu presentation january 2013 ... (shunt design forward...

60
Cobham Microwave Diodes BU presentation 0 Cobham Microwave … The most important thing we build is trust Diodes BU Presentation January 2013

Upload: others

Post on 02-Feb-2021

11 views

Category:

Documents


1 download

TRANSCRIPT

  • Cobham MicrowaveDiodes BU presentation0

    Cobham Microwave …

    The most important thing we build is trust

    Diodes BU Presentation

    January 2013

  • Cobham MicrowaveDiodes BU presentation1

    • Basis• Main parameters• Manufacturing step• Packaging• Applications• Diodes dedicated to MRI• Diodes dedicated to Space market

    Silicon Diodes

    January 2013

  • Cobham Microwave

    •I layer determines Vbr•I layer thickness (W):

    1 to 300 µm• Mesa technology• Oxide or glass passivation• Gold based pads• Normal polarity : PIN• Reverse polarity : NIP

    1- PIN diodes basis:

    Metal pad (anode)

    Glass or oxide

    passivation

    Metal pad (cathode)

    I Layer

    N+ Layer

    P+ Layer

    2 January 2013Diodes BU presentation

  • Cobham MicrowaveJanuary 2013Diodes BU presentation3

    1- PIN diodes basis:

    Reverse Mode:• Vbr: breakdown voltage, large increase of reverse current over 10µA • Vbr is directly related to W• Vbr measured @ Ir=10 µA • Vr: maximum applied reverse voltage defined about 0.9Vbr• Ir @ Vr

  • Cobham Microwave

    Forward Bias :

    • Diode is similar to a variable resistance • Rs depends of the current If• Rs will impact:

    loss in serie switch design

    isolation in shunt design

    January 2013Diodes BU presentation4

    2- Main parameters: Rs

    -ICurrent Generator

    +

    LCR meter

    Rs

    0,1

    1,0

    10,0

    1 10 100

    Rs [

    Oh

    ms]

    If [mA]

    Rs versus If 120 MHz

  • Cobham Microwave

    Reverse Bias :

    • Cj is junction capacitance• Ct=Cj+Cpakaging• Cj decreases untill punch-through voltage

    • Cj min is related to 1/W and Surface S : (ɛS/W)• Cj will impact: loss in shunt design

    isolation in serie design

    January 2013Diodes BU presentation5

    -R

    VCapacitance

    meter

    +

    Ct

    2- Main parameters: Cj, Ct

    0

    0,2

    0,4

    0,6

    0,8

    1

    0 5 10 15 20

    Ct

    [pF]

    Vr [V]

    Ct versus Vr@ 1 MHz DH50101DH50103DH50104DH50106

  • Cobham Microwave

    Reverse Bias :

    • Rp shunts parallel Cj capacitance• For VVpt Rp max• Higher Rp is requested for better performances

    January 2013Diodes BU presentation6

    -R

    VVoltage

    Generator

    +

    LCR meter

    Rp

    2- Main parameters: Rp

    1E+03

    1E+04

    1E+05

    1E+06

    1E+07

    0 5 10 15 20 25 30

    Rp

    [O

    hm

    s]

    Vr [V]

    Rp versus Vr120 MHz

    30 MHz

  • Cobham Microwave

    The parasitic inductance, Lp :

    • added by the bonding • limits the lowest impedance value.• Values from 0.1nH to 1.0nH depending on

    the package and type of bonding

    • No important influence on PIN diode behaviour at frequency below 1GHz.

    • More important than Rs at high frequency Z=Rs+Lp.ω

    January 2013Diodes BU presentation7

    2- Main parameters: Lp

  • Cobham MicrowaveJanuary 2013Diodes BU presentation8

    2- Main parameters: l

    Minority carrier lifetime

    TlV2

    V1=10%V2

    • Physical property of semi conductor• Electrons/holes lifetime before recombination when diode turns from

    forward to reverse

    • Release on quality of material and diode volume (W & S)• Measured @ If=10mA & Ir=6mA

  • Cobham MicrowaveJanuary 2013Diodes BU presentation9

    2- Main parameters: Pin & Pd

    Power handling and Power dissipating:

    PIN diode control RF power: PinA small part of power is dissipated inside the diode Pd=Pin- Pout+ PDC increase of junction temperature

    Pin, Pout : CW or pulse power with

    • Pd=(Tj-Ta)/Rth (thermal resistance)Ta: ambient temperature usually 25°C

    Tj: maximum junction temperature usually 175°C

    • Pd = IRF2 Rs + IDCVDC IDC & VDC are negligible

    ≈ IRF2 Rs (serie design forward bias)

    (shunt design forward bias)

    avs P

    Z

    R

    0

    avPZ0

    sR4

    %*DCPP inav

  • Cobham MicrowaveJanuary 2013Diodes BU presentation10

    2- Main parameters: Rth

    Thermal Resistance

    • Measures the removal of heat by conduction from the diode through the package• Measured with 0.25 to 1Watt & If=3mA • Depends on die size and package

    M208 ~ 50°C/W MELF ~ 30°C/W BH158 ~ 3°C/W

    Rth

    If

    Vr

    Vr1

    Vr2

  • Cobham MicrowaveJanuary 2013Diodes BU presentation11

    Min frequency :

    Must be higher than the I region transit time frequency (The transit time = time for carrier to cross the I region)

    (f : MHz ; w= I layer, µm),

    Using a diode at a too low frequency will increase the distortion

    Example EH80210 : I layer 200µm fmin= 32.5kHzEH50033 : I layer 3µm fmin =144MHz

    Max frequency :

    When the diode is reverse biased, it should not dis-adapt the system

    (Ct, total capacitance, pF)

    Example DH80210 : Cj(50V) = 3pF fmax 1 GHzEH50033 : Cj(50V) = 0.1pF fmax 30 GHz

    2- Main parameters: frequency limits

    t0 C.Z..2

    1f

    1300f

  • Cobham MicrowaveDiodes BU presentation12

    3- Manufacturing Steps:

    – Step 1: Epitaxy• Growth of N+ , I & P+ layer on a bulk material

    – Result : a complete and homogeneous wafer

    – Step 2: Front End

    • Photolithography• Etching of the wafer• Oxide or Glass Passivation• Rear & Back side metallization• Dicing• Test & characterization

    – Result : a bare die

    – Step 3: Back end• For packaged diodes only

    – Result : a packaged diode

    Bulk

    material

    Shipment to

    customer

    Packaged

    diodes

    Step 1:

    Epitaxy

    Step 2:

    Front End

    Step 3:

    Back End(Option)

    Bare Die

    Epitaxied wafer

    Shipment to

    customer

    January 2013

  • Cobham Microwave

    Protection layer

    P+

    I

    N+

    Protection layer

    P+

    N

    N+

    P+

    N2

    N1

    N+

    PIN

    VARICAP

    VARACTOR

    VPH

    Step 1 : Epitaxial layers For Diodes:

    3- Manufacturing Steps:

    January 201313 Diodes BU presentation

  • Cobham Microwave

    Step 1Epitaxy

    Step 2Front End

    Step 3Back End

    Shipment to

    customer

    Shipment to

    customer

    Shipment to

    customer

    Packaged diodes

    Bare Die

    Bulk

    material

    Epitaxied wafer

    – Step 2: Front End

    • Photolithography

    • Etching of the wafer

    • Glass Passivation

    January 2013

    3- Manufacturing Steps:

    14 Diodes BU presentation

  • Cobham Microwave

    Step 1Epitaxy

    Step 2Front End

    Step 3Back End

    Shipment to

    customer

    Shipment to

    customer

    Packaged diodes

    Bare Die

    Bulk

    material

    Epitaxied wafer

    – Step 2: Front End • Photolithography

    • Rear Metallization

    • Back metallization

    • Dicing

    – Step 3: Back end• Packaging of the die

    Shipment to

    customer

    January 2013

    3- Manufacturing Steps:

    15 Diodes BU presentation

  • Cobham MicrowaveDiodes BU presentation16

    • Assembly Capability

    – Bonding:

    • Thermocompression bonding: 12, 18 & 25 µm wires• Ball, Thermosonic or Wedge bonding:

    – Gold only, Up to 200 µm ribbon

    • Thermocompression: – From 12 µm wire diameter

    – up to 2 mm ribbon width

    – Brazing:

    • AuSn (280°C), AuGe (345°C)

    – Gluing:

    • Conductive (84-1 LMISR4), Insulated (84-3)…

    – Sealing:

    • AuSn Brazing sealing,• Electrical sealing

    3- Manufacturing Steps:

    January 2013

  • Cobham MicrowaveDiodes BU presentation17

    High Rel. Screening

    •Reliability

    – ESA Standard• Generic specification ESCC5010

    (discrete microwave semiconductor)• Detail specifications

    – Customer specifications

    High Rel Screening capability

    – Climatic chambers– Life tests (HTRB, PBI,…)– Die shear tests– Pull tests– Gross and fine leakage– Vibrations and accelerations test– PIND tests (Particle Impact Noise

    detection)

    Die share

    PIND test

    Pull test

    Acceleration test

    Leakage test

    January 2013

    3- Manufacturing Steps:

  • Cobham Microwave

    4- Diodes Packaging options:

    2 CERAMIC MELF

    1 CERAMIC PILL

    4 Ceramic SURFACE MOUNT

    3 PLASTIC

    5 SWITCH

    January 201318 Diodes BU presentation

    http://www.google.fr/imgres?imgurl=http://upload.wikimedia.org/wikipedia/de/thumb/d/d9/EADS_Astrium_Logo.svg/800px-EADS_Astrium_Logo.svg.png&imgrefurl=http://de.wikipedia.org/wiki/Datei:EADS_Astrium_Logo.svg&h=337&w=800&sz=23&tbnid=XKv0DBo-kXQi7M:&tbnh=60&tbnw=143&prev=/images?q=astrium+logo&usg=__awSuCXaF1xnk2TpQI-vYh25KjdU=&ei=VrCcS4KvDpPy0gTdl-niAQ&sa=X&oi=image_result&resnum=6&ct=image&ved=0CCAQ9QEwBQ

  • Cobham Microwave

    T Standard Microwave Package For Hi-rel (-> 18 Ghz)

    T Very Good Electrical And Thermal Performances

    T Hermetic

    T Expensive

    T Round Shape, Smd Nightmare !

    M208b F27d

    4- PIN Diodes Packaging options:

    1-Ceramic pills

    January 201319 Diodes BU presentation

  • Cobham Microwave

    T Standard Pin Diode Package For Power Applications (-> 2 GHz)

    T Good Electrical And Thermal Performances

    T Hermetic

    T High Volume Capability / Moderate Cost

    T SMD, Lead Free

    T Only For Selected P/N

    2-Ceramic MELF

    4- PIN Diodes Packaging options:

    January 201320 Diodes BU presentation

  • Cobham Microwave

    SOT23

    DHxxxxx-51

    DHxxxxx-53

    DHxxxxx-54

    DHxxxxx-55

    T Standard Economical Package For Low Power Applications (-> 2 GHz)

    T Not Hermetic But MSL1 Qualified

    T High Volume Capability / Low Cost

    T SMD, Lead Free

    T For Less Critical Applications

    3-Plastic SMD

    4- PIN Diodes Packaging options:

    January 201321 Diodes BU presentation

  • Cobham Microwave

    4- PIN Diodes Packaging options:

    T Plastic Package For Extended

    Frequency Applications (6 GHz)

    T High Integration Capability

    T High Volume Capability / Low Cost

    (Collective Process)

    T SMD, Lead Free, MLS1

    T Design Flexibility, Footprints Available

    4- High Density Surface Mount/ DFN

    January 201322 Diodes BU presentation

  • Cobham Microwave

    4- PIN Diodes Packaging options:

    T Microwave Package For power handling

    T Very Good Electrical And Thermal Performances :

    - Grounded heat sink

    - isolated heat sink, with or without connection

    T Hermetic

    T Expensive

    5- High power package

    BH141 BH300

    January 201323 Diodes BU presentation

  • Cobham Microwave

    Ceramic Pill

    (M208a)

    MELF SOT/SOD DFN

    Surface Mount No Yes Yes Yes

    Automatic

    Pick&Place

    No Yes Yes Yes

    Moisture Sensitivity Hermetic Hermetic MSL1 MSL1

    Integration Capability + + + +++

    Electrical

    performances

    +++ ++ + ++

    Power dissipation ++++ +++ + ++

    Cost 10 4 1.0 1.5

    Design flexibility + - ++ +++

    4- PIN Diodes Packaging options:

    January 201324 Diodes BU presentation

  • Cobham MicrowaveJanuary 2013Diodes BU presentation25

    Diodes main popular package types

    M208B BMH76

    BH141

    BH194

    F27d BH142

    BH158 BH300 BH204

    SMD 4/6/8 (Melf) SOT143SOD323

    All diodes can be supplied in bare dies

    M208A

    BH405

    DFN 2L1

  • Cobham MicrowaveDiodes BU presentation

    D H 8 0 1 2 0 - xx

    EH for Die

    DH for packaged Diode

    Vbr class for PIN orcapacitance class for varactors

    Capacitance Class

    Package designation or SCD

    Diode Class

    DH2xx /multiplierDH5xx /SRDDH40xxx/AttenuatorDH50xxx/Pin low powerDH60xxx/limiterDH7xxxx/tuning VaractorDH80xxx/High power

    Diodes reference construction :

    DH80 serie :05 for 500V 10 for 1000V etc...

    DH50 or DH60 serie :05 for 50V10 for 100V etc...

    January 201326

  • Cobham MicrowaveDiodes BU presentation27

    Silicon Diodes Product Range1. Switch application2. Limiter application3. Attenuator Application4. Tuning Varactors5. Frequency Multiplication6. Voltage Multiplier7. MOS Capacitors

    5- Applications:

    January 2013

  • Cobham MicrowaveDiodes BU presentation28

    1. Switching application :– Antenna switching,

    – Filter bank, agile filters…

    – Market : military radio, PMR, IF control devices …

    5- Applications:

    January 2013

    Switching

  • Cobham MicrowaveJanuary 2013

    loss & Isolation

    29 Diodes BU presentation

    5- Applications: Serie Switch

  • Cobham MicrowaveJanuary 201330 Diodes BU presentation

    5- Applications: Shunt Switch

    loss & Isolation

  • Cobham MicrowaveDiodes BU presentation31

    Fast switching, low & medium power: DH50xxx series

    • Thin I layer: from 2 to 50 µm• Oxide (≤100V) or glass passivation (>100V)• Breakdown voltage : from 30V to 400 V• Junction capacitance : from 25 fF to 0.8 pf typical• Serie resistance: down to 0.5 @ 10 mA• l : from 20 ns to 2 µs typical• Application from L to Ku band, power handling up 50W

    Available : in die form, hermetic ceramic package, strip line and plastic packages

    * Example DH50256

    5.1 Switching application

    January 2013

  • Cobham MicrowaveDiodes BU presentation32

    High power PIN diodes : DH80xxx series• Thick I layer: from 50 to 300 µm• Mesa design and glass passivation• Breakdown voltage : 500V to 3000 V• Low Cj for a good isolation: from 0.1 pF to 3 pF • low Rs for lower insertion Loss: Rs: 0.25 to 0.7 @ 100mA• Large minority carrier life time for low distortion

    Available in die or various packages : series, shunt, flat mounted or with grounded or electrically isolated heat sink for optimal thermal behavior

    High power switches : SH90xxx serie• SP2T, SP3T• Pin : 10 W to 1000W CW• 1 Mhz to 1 GHz

    Pill

    Stud

    Isolated stud

    5.1 Switching application

    January 2013

  • Cobham MicrowaveDiodes BU presentation33

    Stud

    Pill

    Isolated stud

    New Items: 3000V High power Diode– DH80307 & DH80309 diodes for kiloVolt range application

    – High voltage : Ir < 10 µA @ 3000V capability

    – High current : up to 25A handling

    – Resistance as low as 0.15Ω @ 500 mA (ref: DH80309-01)

    – Capacitance as low as 2.5 pF @ - 200V (DH80307-01)

    – High Carrier life time 45 µs min for low distortion

    – Thermal resistance less than 3°C/W (DH80309-01)

    – High power handling typical 1kW CW

    – High power handling above 30kW with DC 4% tested

    – Small size comparing to MACOM Diode

    Available with grounded or electrically isolated heat sink for optimal thermal behavior

    Switch

    5.1 Switching application

    MACOM Cobham

    January 2013

  • Cobham MicrowaveDiodes BU presentation34

    • Breakdown voltage : 50V to 1000 V• Low loss, low distortion :

    – Ct from 0.3 pF to 3 pF

    – Rs: 0.25 to 0.7 @ 100mA

    – low inductance

    – High minority carrier lifetime

    • High power dissipation up to 10W

    • Glass passivated PIN diode chip• Hermetically sealed package• Various Sizes SMD4, SMD6,

    SMD8

    • Non magnetic package option• With connection option

    • DH80xx series in MELF SMD package

    0

    2

    4

    6

    8

    10

    12

    0 25 50 75 100 125 150 175

    Pd [

    W]

    Tcase [°C]

    Square MELF Diodes Maximum Dissipated Power Rating*

    DH50209DH80050DH80051DH80052DH80053DH80054DH80055DH80082DH80100DH80101DH80102DH80106

    *diode brazed on infinite copper heat

    5.1 Switching application

    January 2013

  • Cobham MicrowaveDiodes BU presentation35

    New Items: DFN diodes

    – Dual Flat No-lead package

    – Cost effective, SMD, high volume

    • Miniaturized• Flexibility (size, diode combinations)• Adaptability to board design

    – Low parasitic:

    • Capacitance package < 0.1 pF– Non hermetic, high reliability: MSL1 level

    1 2 3 4 50 6

    -25

    -20

    -15

    -10

    -5

    -30

    0

    freq, GHz

    dB

    (S(2

    ,1))

    Isolation at -10V

    1 2 3 4 50 6

    -0.8

    -0.6

    -0.4

    -0.2

    -1.0

    0.0

    freq, GHz

    dB

    (S(2

    ,1))

    Insertion loss 10mA

    Now available in serie and shunt configuration

    Variable package size 2L1, 2L2, 3L2, and 2L0603

    – Large range of Vbr: 50V to 1000 V

    – Good thermal performance : 25 to 60°C/W

    – Frequency up to 10 Ghz

    – Complete data sheets with DC & RF characteristics

    – Equivalent circuit Available

    * Example DH50401-90N

    5.1 Switching application

    January 2013

  • Cobham MicrowaveDiodes BU presentation36

    New Items: Antiparallel pair PIN Diodes:available now

    – Effective passive rectifier to tune and de tune MRI tank circuit

    – 2 options: single and dual antiparallel pair

    – Capacitance: Ct (0V) = 1 pF typical (single pair)

    – Resistance: Rsf = 1.2 Ω @ 10 mA

    – Full non magnetic package

    – Surface mount package BH60 & BH61

    – Ref DH52076 (single pair) DH54076 (dual pair)Block diagram

    BH60 BH61

    January 2013

    5.1 Switching application: MRI Market

  • Cobham MicrowaveDiodes BU presentation37

    – Radio receiver protector

    – Mainly military: radar application

    5.2 Limiter application

    January 2013

    F

    AntennaDuplexer

    Low Noise Amplifier

    Switch (diodes)

    Tx Amplifier

    Attenuator

    Medium Power Amplifier

    Switch (diode)

    Phase shifter

    Medium Power Amplifier

    Load

    CIL (Circulator/Isolator/Limiter)

    Limiter

  • Cobham MicrowaveDiodes BU presentation38

    Limiter : DH60xxx series

    – Breakdown voltage : 25V to 200V

    – Junction capacitance : from 0.1 pF to 0.7pF typical

    – Low loss

    – threshold @ 2.7 GHz : from + 10 to + 25 dBm

    – leakage power @ 2.7 Ghz from : + 20 to + 30 dBm

    – Pin CW max (W) : from 2 to up to 15W, New P/N DH60154

    5.2 Limiter application

    0

    5

    10

    15

    20

    25

    30

    35

    0 10 20 30 40 50

    Pou

    t [d

    Bm

    ]

    Pin [dBm]

    Pout Vs Pin Pout

    Frequency (GHz)

    Inse

    rtio

    n Lo

    ss (d

    B)

    0.0

    1.0

    2.0

    3.0

    4.0

    5.0

    6.0

    7.0

    8.0

    9.0

    10.0

    -0.75

    -0.7

    -0.65

    -0.6

    -0.55

    -0.5

    -0.45

    -0.4

    -0.35

    -0.3

    -0.25

    -0.2

    -0.15

    -0.1

    -0.05

    0.0

    -10 V

    -20 V

    -35 V

    -5V

    0 V

    January 2013

  • Cobham MicrowaveJanuary 2013Diodes BU presentation39

    5.2 Limiter application

    DH60154 -62N: Equivalent circuit

    Wire bonding

    diode

    Metallic hole inductance

    and Cathode brazing Alumina

    substrate

    Equivalent circuit is done for DFN 3L2 package in forward modeDiode is brazed on Alumina substrate

  • Cobham MicrowaveDiodes BU presentation40

    DH60154 -62N: Equivalent circuit

    Forward bias

    5.2 Limiter application

    January 2013

    Reverse biasLbonding = 0.62 nH

    Cp = 51 fF

    Lpar = 11.2 nH

    Rpar = 184 Ohms

    Lvia = 0.094 nH

    Rdiode = 0.33 Ohms

    Cj = 328 fF

  • Cobham MicrowaveJanuary 2013Diodes BU presentation41

    5.2 Limiter application

    Forward bias

    Reverse bias

    Black:Measure , Red: Simulation

  • Cobham MicrowaveDiodes BU presentation42

    Attenuator : DH40xx series

    – Main application : Automatic Gain Control

    – Market : CATV, repeater, radio links, UFH radio, IF control devices …

    5.3 Attenuator application

    January 2013

    Attenuator

  • Cobham MicrowaveDiodes BU presentation43

    Attenuator : DH40xxx series

    – wide dynamic range :

    • From : 10 up to 700 (@ If = 100 mA down to 0.1 mA)• 3 types of diodes

    – junction capacitance :

    • 0.3 pF to 0.10 pF typical– Telecom, Defense & Space applications

    5.3 Attenuator application

    January 2013

  • Cobham MicrowaveDiodes BU presentation44

    Tuning Varactor applications:

    – Main application : VCO, tunable filter

    – Market : almost all telecom system

    • Space• Military• Telecom …

    5.4 Tuning Varactor

    January 2013

  • Cobham MicrowaveDiodes BU presentation45

    Varactor hyperabrupt: DH76xxx series

    – Breakdown voltage: 20V min

    – Cj (4V) : from 1.2 to 15 pF

    – Tuning ratio: Ct(0)/Ct(20) : 5 to 7

    – Q factor: 140 to 2200

    0

    1

    10

    100

    1000

    0.1 1 10 100

    Ct

    [pF

    ]

    V[V]

    Typical total capacitance versus reverse voltage

    DH71004_m208 DH71008_m208 DH71012_m208 DH71020_m208 DH71030_m208 DH71045_m208

    DH71067_m208 DH71100_m208 DH71120_m208 DH71330_m208 DH71560_m208 DH71999_m208

    Varactor abrupt: DH71xxx series

    – Breakdown voltage: 30V min

    – Cj (4V) : from 0.4 to 100 pF

    – Tuning ratio: Ct(0) / Ct(30) : 3 to 5.2

    – Q factor : 300 to 4500

    5.4 Tuning Varactor

    January 2013

  • Cobham MicrowaveDiodes BU presentation46

    SRD diodes: DH54x & DH2xx series

    – SRD : DH54x series :

    • Vbr : 15 V to 50 V

    • Snap off time : 60ps to 150 ps typical

    • Cj(6v) : from 0.3 pF to 1.5 pF

    – Multiplier : DH2xx series :

    • up to 25 GHz output Frequency

    • 200 mW to 20 W Pout

    • Snap off time : 60 to 1000 ps

    Application : comb generator

    5.5 Frequency multiplication application

    January 2013

  • Cobham MicrowaveDiodes BU presentation47

    DH85050 & DH85100

    Now available in DFN-3L1 package

    – High voltage dual diode

    – Vbr: 500V & 1000 V

    – Very low leakage current : less than 5nA @ 1000V @ 25°C

    – Low capacitance 50fF or 150fF typical

    – Low reverse recovery time

  • Cobham MicrowaveDiodes BU presentation48

    Single and Multi-Pad MOS capacitors :

    – up to 30 GHz

    – 40 to 500V voltage range

    – 0,1 to 470 pF

    – temperature coefficient : 50ppm / °C

    – tolerance : • standard : 20%• option : down to 2 %

    – multi-pad bar series available

    – standard parts and specific on request : bare die only

    5.7 MOS capacitors

    January 2013

  • Cobham MicrowaveJanuary 2013Diodes BU presentation49

    Diodes main popular package types

    M208B BMH76

    BH141

    BH194

    F27d BH142

    BH158 BH300 BH204

    SMD 4/6/8 (Melf) SOT143SOD323

    All diodes can be supplied in bare dies

    M208A

    BH405

    DFN 2L1

  • Cobham MicrowaveDiodes BU presentation50

    Types Applications Vbr Junction Capacitance AdvantagesSeries Ref.

    PIN

    High power switching

    500 to 3000 V Low Cj for a good isolation Cj(50V): 0,15 pF to 3 pF

    Low Rs for lower ILRs : from 0,3 W to 0,7 W

    DH80xxx

    Fast switching 150 to 400 V Cj(50V): 0,04 pF to 0,17 pF I layer < 50µmt l : from 200 ns to 2000ns

    DH50xxx

    Ultra fast switching

    30 to 100 V Cj(6V): 0,08 pF to 0,17 pF I layer < 10 µmt l : from 20 ns to 500 ns typical

    DH50xxx

    AGC,Attenuator

    100V Cj(50V) : 0,1pF to 0,3 pF 1 W @ If=10 mA up to 100 W @ If=0,1 mA,10 W @ If=10 mA up to 300 W @ If=0,1 mA

    DH40xxx

    Limiter25 to 200 V Cj(0V): 0,14 pF to 0,45 pF Threshold @2,7 GHz:+10 to +20 dBm

    Leak. power @2,7 GHz:+20 to +35 dBmPin max: 2 to 7 W

    DH60xxx

    Varactor

    VCO (Voltage

    Controlled Oscillators)

    30 V, Q-factor: 300 to 4500

    Cj(Vr4v): 0,4 to 100 pF Ct0/Ct30: 3,3 to 5,2 DH71xxx

    45 V, Q-factor: 250 to 3000

    Cj(Vr4v): 0,4 to 100 pF Ct0/Ct45: 3 to 6 DH72xxx

    20 V Cj(Vr4v): 1,2 to 15 pF Ct0/Ct20: 5 to 7 DH76xxx

    SRD Frequency Multiplier

    25 V to 30 V Cj(6v): 0,3 pF to 12,5 pFSnap off time: 60ps to 150 ps DH54x

    Up to 25 GHz Fout, 200 mW to 20 W Pout,Snap off time: 60 to 1000 ps

    DH2xx

    MOS Cap MOS Capacitor Up to 500V 0,1 to 470 pF Low temperature coefficient

    Silicon Diode Product Line Summary

    January 2013

  • Cobham MicrowaveCompany restricted

    PIN Diode memento

    Technical specificationsItems Conditions To be specify Unit Min Typical Max

    Breakdown voltage : @ I r < 10 µA - V

    Total capacitance : @ f = 1 MHz @ Vr = pF

    Forward resistance Rsf : @ f = 120 MHz @ If = W

    Minority carrier life time : If = 10 mA, Ir = 6 mA - µs

    Package style :

    Application :

    • Switch (serie ? Parallel ?)

    • Attenuator

    • limiter

    Frequency range

    Input power : Peak W - -

    Input power : CW W - -

    Duty cycle :

    Temperature range : °C

  • Cobham MicrowaveCompany restricted

    Silicon Tuning Varactor memento

    Items : Conditions To be specify at Unit Min Typical Max

    Breakdown voltage : @ I r < 10 µA - V

    Total capacitance :@ f = 1 MHz

    @ Vr = 4V pF

    @ Vr = 12V pF

    @ Vr = 20V pF

    @ Vr = 30V pF

    Tuning ratio : @ f = 1 MHz

    Ct 1V/Ct12V - - -

    Ct 1V/Ct20V - - -

    Ct 1V/Ct30V - - -

    Figure of Merit : @f = 50 MHz, Vr=4V -

    Temperature range : °C -

    Package style :

    Technical specifications

  • Cobham MicrowaveDiodes BU presentation53

    Diodes dedicated toMRI market

    January 2013

  • Cobham Microwave

    6-Diodes dedicated to MRI

    PIN diodes are used as the switching element in MRI coil switches

    Diodes BU presentation54

    Key figures for a diode dedicated for MRI :

    •avoid to distort the magnetic field linked to coils must not contain any magnetic material•must not degrade Signal to Noise Ratio when switch is off •high parallel resistance at reverse bias•low loss when switch is on•low series resistance at forward bias•High RF power handling•low thermal resistance

    January 2013

  • Cobham Microwave

    Cobham P/N case

    Anti parallel diodes DH52076-01DH54076-01

    BH60BH61

    High voltage diode SQM1250-40NDH80052-40NDH80055-40NDH80100-40N

    SMD4AM

    High voltage diode SQM1450-44NDH80106-44N

    SMD8AM

    High voltage diode DH80106-11NDH80159-11

    BH158AMBH141 (mag)

    3kV diodes DH80309DH80307

    DH80289 (2800V)

    BH158AMAlso availableBH141 (mag)BH300 (mag)

    Diodes BU presentation55

    BH60 BH158AMSMD8AMSMDxAM+LEADBH61

    Stud

    Isolated stud

    6- Diodes dedicated to MRI

    January 2013

  • Cobham MicrowaveDiodes BU presentation56

    Diodes dedicated toSpace market

    January 2013

  • Cobham MicrowaveJanuary 2013Diodes BU presentation57

    Most popular packages :

    M208

    F27d

    SILICON DIODES, MOS CAPACITOR : ESA QPL LIST

    7- Diodes dedicated to Space Market

  • Cobham MicrowaveJanuary 2013Diodes BU presentation58

    ESCC5010 Generic normSILICON DIODES: ESA QPL LIST

    ESCC web site: https://escies.org/

    Sub-Families Types Detail Spec. Status

    Tuning Varactors DH 76 XXX 5512/023Certificate 273D

    Extended

    Multipliers Varactors, DH 267, 252, 256, 292, 294 5512/016

    Certificate 225EExtended

    PIN, Fast Switching

    DH 50151 – DH 50157 5513/031

    DH 50201 – DH 50209 5513/033

    DH 50251 – DH 50256 5513/034

    PIN, Ultra Fast Switching

    DH 50033 – DH 50037 5513/032

    DH 50052 – DH 50057 5513/036

    DH 50071 – DH 50077 5513/037

    DH 50101 – DH 50107 5513/038

    MOS CapacitorsTypes 101M, 201M, 400M

    and 401M5711/002

    Certificate 286A VOQ in progress

    7- Diodes dedicated to space Market

    file:///F:/Certificats & QPL/QPL MOS DH50xx DH2xx DH76xx.pdf

  • Cobham Microwave

    THANK YOU!

    www.cobham.com/microwave

    http://www.cobham.com/microwavehttp://www.cobham.com/microwave