ATTENUATORS - DIGITAL - CHIP
1
HMC424A
v01.1115
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
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
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rights of third parties that may result from its use. Specications subject to change without notice. No
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Electrical Specications, T
A
= +25° C, With Vee = -5V & VCTL = 0/-5V
The HMC424A 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 HMC424A die is a broadband 6-bit GaAs IC digi-
tal 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
+42 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
3.4
4.2
4.0
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 - 31.5 dB states DC - 13.0 GHz ± (0.3 + 6% of Atten. Setting) Max dB
Input Power for 0.1 dB Compression 1.0 - 13.0 GHz 24 dBm
Input Third Order Intercept Point
(Two-Tone Input Power= 15 dBm Each Tone)
REF State
All Other States
1.0 - 13.0 GHz
46
42
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
