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PDF HMC424 Data sheet ( Hoja de datos )
| Número de pieza | HMC424 | |
| Descripción | 0.5dB LSB GaAs MMIC 6-BIT DIGITAL ATTENUATOR/ DC - 13 GHz | |
| Fabricantes | Hittite Microwave Corporation | |
| Logotipo |  |
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MICROWAVE CORPORATION
v02.0404
HMC424
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
Typical Applications
The HMC424 is ideal for:
2 • Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar, & ECM
• Space Applications
Functional Diagram
Features
0.5 dB LSB Steps to 31.5 dB
Single Control Line Per Bit
+/- 0.5 dB Typical Bit Error
Die Size: 0.85 mm x 1.45 mm x 0.1 mm
General Description
The HMC424 die is a broadband 6-bit GaAs IC
digital attenuator MMIC chip. Covering DC to 13
GHz, the insertion loss is less then 4 dB typical.
The attenuator bit values are 0.5 (LSB), 1, 2, 4,
8, and 16 dB for a total attenuation of 31.5 dB.
Attenuation accuracy is excellent at ± 0.5 dB typi-
cal step error with an IIP3 of +32 dBm. Six con-
trol voltage inputs, toggled between 0 and -5V,
are used to select each attenuation state. A single
Vee bias of -5V allows operation at frequencies
down to DC.
Electrical Specifications, TA = +25° C, With Vee = -5V & VCTL = 0/-5V
Parameter
Frequency (GHz)
Min.
Typ.
Max.
Units
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy: (Referenced to Insertion Loss)
Input Power for 0.1 dB Compression
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
Switching Characteristics
DC - 8.0 GHz
8.0 - 13.0 GHz
DC - 13.0 GHz
DC - 8.0 GHz
8.0 - 13.0 GHz
3.0 3.8
4.0 4.6
31.5
8 12
11 15
dB
dB
dB
dB
dB
0.5 - 7.5 dB States
8 - 31.5 dB States
REF State
All Other States
DC - 13.0 GHz
DC - 13.0 GHz
1.0 - 13.0 Ghz
1.0 - 13.0 Ghz
DC - 13.0 GHz
± 0.3 + 4% of Atten. Setting Max
± 0.3 + 6% of Atten. Setting Max
22
46
32
dB
dB
dBm
dBm
dBm
tRISE, tFALL (10/90% RF)
tON/tOFF (50% CTL to 10/90% RF)
30 ns
50 ns
2-8
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
1 page  
MICROWAVE CORPORATION
v02.0404
HMC424
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
Suggested Driver Circuit (One Circuit Required Per Bit Control Input)
2
Simple driver using inexpensive standard logic ICs provides fast switching using minimum DC current.
* Recommended value to suppress unwanted RF signals at V1 - V6 control lines.
Assembly Diagram
2 - 12
Mounting & Bonding Techniques for Millimeterwave GaAs MMICs
The die should be attached directly to the ground plane eutectically or with conductive epoxy (see HMC general Handling,
Mounting, Bonding Note).
50 Ohm Microstrip transmission lines on 0.127mm (5 mil) thick alumina thin film substrates are recommended for bringing RF
to and from the chip (Figure 1). If 0.254mm (10 mil) thick alumina thin film substrates must be used, the die should be raised
0.150mm (6 mils) so that the surface of the die is coplanar with the surface of the substrate. One way to accomplish this is to
attach the 0.102mm (4 mil) thick die to a 0.150mm (6 mil) thick molybdenum heat spreader (moly-tab) which is then attached
to the ground plane (Figure 2).
Microstrip substrates should be brought as close to the die as possible in order to minimize bond wire length. Typical die-to-
substrate spacing is 0.076mm to 0.152 mm (3 to 6 mils).
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet HMC424.PDF ] | |
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