MICROWAVE CORPORATION
v01.0304
HMC346
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 20 GHz
Features
Wide Bandwidth: DC - 20 GHz
Low Phase Shift vs. Attenuation
32 dB Attenuation Range
Die Size: 0.85 mm x 0.85 mm x 0.1 mm
Typical Applications
This attenuator is ideal for use as a VVA
for DC - 20 GHz applications:
2
ATTENUATORS - CHIP
鈥?Point-to-Point Radio
鈥?VSAT Radio
Functional Diagram
General Description
The HMC346 die is an absorptive Voltage Variable
Attenuator (VVA) operating from DC - 20 GHz. It
features an on-chip reference attenuator for use with
an external op-amp to provide simple single volt-
age attenuation control, 0 to -3V. The device is
ideal in designs where an analog DC control signal
must control RF signal levels over a 30 dB ampli-
tude range. For plastic packaged version, see the
HMC346MS8G which operates from DC - 8 GHz.
Electrical Speci鏗乧ations,
T
A
= +25擄 C, 50 ohm system
Parameter
Insertion Loss
DC - 12GHz:
DC - 20 GHz:
DC - 12 GHz:
DC - 20 GHz:
DC - 12 GHz:
12 - 20 GHz:
tRISE, tFALL (10/90% RF):
tON, tOFF (50% CTL to 10/90% RF):
Min. Atten:
Atten. >2 dB:
Min. Atten:
Atten. >2 dB:
27
22
6
10
Min.
Typ.
1.7
2.2
32
25
10
15
2
8
+8
+4
+25
+10
Max.
2.3
2.8
Units
dB
dB
dB
dB
dB
dB
ns
ns
dBm
dBm
dBm
dBm
Attenuation Range
Return Loss
Switching Characteristics
Input Power for 0.25 dB Compression (0.5 - 20 GHz)
Input Third Order Intercept (0.5 - 20 GHz)
(Two-tone Input Power = -8 dBm Each Tone)
2-2
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
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