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PDF DMJxxxx Data sheet ( Hoja de datos )

Número de pieza DMJxxxx
Descripción Silicon Beam-Lead and Chip Schottky Barrier Mixer Diodes
Fabricantes Alpha 
Logotipo Alpha Logotipo



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Silicon Beam–Lead
Schottky Barrier Mixer Diodes
DME, DMF and DMJ Series
Features
Ideal for MIC
Low 1/f Noise
Low Intermodulation Distortion
Low Turn On
Hermetically Sealed Packages
SPC Controlled Wafer Fabrication
Description
Alpha beam–lead and chip Schottky barrier mixer
diodes are designed for applications through 40 GHz
in Ka–band. The beam–lead design eliminates the
problem of bonding to the very small junction area
that is characteristic of the low capacitance involved
in microwave devices.
Beam–lead Schottky barrier mixer diodes are made
by the deposition of a suitable barrier metal on an
epitaxial silicon substrate to form the junction. The
process and choice of materials result in low series
resistance along with a narrow spread of capacitance
values for close impedance control.
A variety of forward knees are available, ranging from
a low value for low, or starved, local oscillator drive
levels to a higher value for high drive, low intermode
mixer applications. The beam–lead diodes are
available in a wide range of packages as shown.
Capacitance ranges and series resistances are
comparable with the packaged devices that are
available through K–band. The unmounted diodes
are especially well suited for use in microwave
integrated circuits. The mounted devices can be
easily inserted as hybrid elements in stripline,
microstrip or other such circuitry.
Beam–lead and chip Schottky barrier diodes are
categorized by noise figure for mixer applications in
four frequency ranges: S, X, Ku and Ka–bands.
However, they can also be used as modulators, high
speed switches and low power limiters.
Several types of semiconductor–barrier metal
systems are available, thus allowing proper selection
for optimum mixer design. For most applications the
N–type silicon, low drive types are preferable,
especially for starved LO mixers.
Beam–lead diodes are ideally suited for balanced
mixers, since they exhibit low parasitics and are
extremely uniform. A typical VF vs. IF curve is shown
in Figure 1. Typical noise figures vs LO drive is shown
in Figure 2 for single N–type, low drive diode types.
Maximum Ratings
Storage Temperature:
Operating Temperature:
Dissipated Power:
Max Current:
–65°C/+175°C
–65°C/+175°C
75 mW/Junction
100 mA
3–12 Alpha Industries [617] 935Ć5150 Fax [617] 824Ć4579 E-mail [email protected] Visit our web site: www.alphaind.com

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DMJxxxx pdf
Silicon Beam–Lead Schottky Barrier Mixer Diodes
www.DataSheet4U.com
DME, DMF and DMJ Series
Beam–Lead (Ring Quad), N–Type,
Low, Medium, High Drive
Freq.
Band
S
X
KU
K
CJ
0V 1 MHz
pF
Min. Max.
0.30 0.50
0.15 0.30
0.05 0.15
– 0.1
RS
10 mA
Max.
5
8
13
18
VB
10 µA
Min.
2
3
4
2
3
4
2
3
4
2
3
4
VF
1 mA
mV
Min. Max.
200 260
300 400
500 600
250 310
325 425
550 650
260 330
350 450
500 680
270 350
375 550
600 700
Drive
Level
Low
Med
High
Low
Med
High
Low
Med
High
Low
Med
High
Beam
Lead
488–002
Epoxy
Packages
254 234
DMF2865–000 DMF2865–254 DMF2865–234
DME2857–000 DME2857–254 DME2857–234
DMJ2502–000 DMJ2502–254
DMF2011–000 DMF2011–254 DMF2011–234
DME2858–000 DME2858–254
DMJ2990–000 DMJ2990–254
DMF2012–000 DMF2012–254 DMF2012–234
DME2859–000 DME2859–254 DME2859–234
DMJ2667–000 DMJ2667–254 DMJ2667–234
DMF2454–000
DMF2454–234
DME2459–000
DME2459–234
DMJ2455–000
DMJ2455–234
Beam–Lead (Bridge Quad), N–Type,
Low, Medium, High Drive
Freq.
Band
S
X
KU
K
CJ
0V 1 MHz
pF
Min.
Max.
0.30 0.50
0.15 0.30
0.05 0.15
– 0.1
RS
10 mA
Max.
5
8
13
18
VB
10 µA
Min.
2
3
4
2
3
4
2
3
4
2
3
4
VF
1 mA
mV
Min.
Max.
200 260
300 400
500 600
250 310
325 425
550 650
260 330
350 450
500 680
270 350
375 550
600 700
Drive
Level
Low
Med
High
Low
Med
High
Low
Med
High
Low
Med
High
Beam
Lead
488–004
Epoxy
Package
255 235
DMF2076–000 DMF2076–255 DMF2076–235
DME2029–000 DME2029–255
DMJ2312–000 DMJ2312–255
DMF2077–000 DMF2077–255
DME2850–000 DME2850–255
DMJ2088–000 DMJ2088–255
DMF2078–000
DME2031–000
DMJ2768–000
DMF2848–000
DME2851–000
DMJ2852–000
DMF2078–255
DME2031–255
DMJ2768–255
3–16 Alpha Industries [617] 935Ć5150 Fax [617] 824Ć4579 E-mail [email protected] Visit our web site: www.alphaind.com

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