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For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
1
HMC424LP3 / 424LP3E
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
v08.0809
Functional Diagram
Electrical Specifications, T
A
 = +25?C, With Vee = -5V & VCTL= 0/-5V
The HMC424LP3 / HMC424LP3E is ideal for:
" Basestation Infrastructure
" Fiber Optics & Broadband Telecom
" Microwave & VSAT Radios
" Military & Space
" Test Instrumentation
0.5 dB LSB Steps to 31.5 dB
Single Control Line Per Bit
?0.5 dB Typical Bit Error
9mm
2
 Leadless SMT Plastic Package
The HMC424LP3 & HMC424LP3E are broadband
6-bit GaAs IC digital attenuators in low cost leadless
surface mount packages. 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 typical step error with an IIP3 of
+32 dBm. Six control voltage inputs, toggled between
0 and -5V, are used to select each attenuation state.
A single Vee bias of -5V allows operation at frequ-
encies down to DC.
Parameter
Frequency (GHz)
Min.
Typ.
Max.
Units
Insertion Loss
DC - 4 GHz
4.0 - 8.0 GHz
8.0 - 13.0 GHz
3.1
3.5
4.0
3.8
4.0
4.6
dB
dB
dB
Attenuation Range
DC - 13.0 GHz
31.5
dB
Return Loss (RF1 & RF2, All Atten. States)
DC - 13.0 GHz
9
12
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
0.5 - 15.5 dB States
16 - 31.5 dB States
DC - 13.0 GHz
DC - 13.0 GHz
?(0.3 + 3% of Atten. Setting) Max
?(0.3 + 5% 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
Typical Applications
Features
General Description
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