ATTENUATORS - DIGITAL - CHIP
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HMC424
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
v06.0809
Electrical Speci cations, T
A
= +25° C, With Vee = -5V & VCTL = 0/-5V
The HMC424 is ideal for:
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar & ECM
• Space Applications
0.5 dB LSB Steps to 31.5 dB
Single Control Line Per Bit
±0.5 dB Typical Bit Error
Die Size: 1.45 x 0.85 x 0.1 mm
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 attenua-
tor 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 typical step error with an IIP3 of
+32 dBm. Six control voltage inputs, toggled bet-
ween 0 and -5V, are used to select each attenuation
state. A single Vee bias of -5V allows operation at fre-
quencies down to DC.
Parameter Frequency (GHz) Min. Typ. Max. Units
Insertion Loss
DC - 8.0 GHz
8.0 - 13.0 GHz
3.0
4.0
3.8
4.6
dB
dB
Attenuation Range DC - 13.0 GHz 31.5 dB
Return Loss (RF1 & RF2, All Atten. States)
DC - 8.0 GHz
8.0 - 13.0 GHz
8
11
12
15
dB
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
0.5 - 7.5 dB States
8 - 31.5 dB States
DC - 13.0 GHz
DC - 13.0 GHz
± 0.3 + 4% of Atten. Setting Max
± 0.3 + 6% of Atten. Setting Max
dB
dB
Input Power for 0.1 dB Compression 1.0 - 13.0 Ghz 22 dBm
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
REF State
All Other States
1.0 - 13.0 Ghz
46
32
dBm
dBm
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON/tOFF (50% CTL to 10/90% RF)
DC - 13.0 GHz
30
50
ns
ns
General Description
Features
Functional Diagram
Typical Applications
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
For price, delivery, and to place orders: Analog Devices, Inc.,
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106
Phone: 781-329-4700 • Order online at www.analog.com
Application Support: Phone: 1-800-ANALOG-D