HMC346LC3B
v06.0514
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR， DC - 18 GHz
General Description
Features
Functional Diagram
Wide Bandwidth: DC - 18 GHz
Low Phase Shift vs. Attenuation
30 dB Attenuation Range
Simplified Voltage Control
RoHS Compliant 3 x 3 mm SMT Package
Electrical Specifications， TA = +25° C， 50 Ohm system
Typical Applications
The HMC346LC3B is ideal for:
? Test Instrumentation
? Fiber Optics & Broadband_Telecom
? Microwave Radio & VSAT
? Military Radios， Radar， & ECM
The HMC346LC3B is an absorptive Voltage Variable
Attenuator (VVA) in a leadless “Pb free” RoHS
compliant SMT mount ceramic package operating from
DC - 18 GHz. It features an on-chip reference
attenuator for use with an external op-amp to provide
simple single voltage 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 amplitude range. The HMC346LC3B allows
the use of surface mount manufacturing techniques.
Parameter Min Typical Max Units
Insertion Loss
DC - 10 GHz
DC - 14 GHz
DC - 18 GHz
1.5
2.2
2.8
2.0
2.7
3.5
dB
dB
dB
Attenuation Range DC - 12 GHz
DC - 18 GHz
26
22
30
26
dB
dB
Return Loss DC - 18 GHz 10 dB
Input Power for 0.25 dB Compression (0.5 - 18 GHz)
Min. Atten:
Atten. >2 dB:
+8
-4
dBm
dBm
Input Third Order Intercept (0.5 - 18 GHz)
(Two-tone Input Power = -8 dBm Each Tone)
Min. Atten:
Atten. >2 dB:
+25
+10
dBm
dBm
Switching Characteristics tRISE， tFALL (10/90%_RF):
tON， tOFF (50%_CTL to 10/90%_RF):
28
ns
ns
