HMC346C8_08 Datasheet, PDF (1/6 Pages) Hittite Microwave Corporation – GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR, DC - 8 GHz

v02.1008
5
Typical Applications
The HMC346C8 is ideal for:
• Basestation Infrastructure
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar, & ECM
• Test Instrumentation
Functional Diagram
HMC346C8
GaAs MMIC SMT VOLTAGE-
VARIABLE ATTENUATOR, DC - 8 GHz
Features
Wide Bandwidth: DC - 8 GHz
Low Phase Shift vs. Attenuation
30 dB Attenuation Range
Surface Mount Ceramic Package
General Description
The HMC346C8 is an absorptive Voltage Variable
Attenuator (VVA) in a non-hermetic surface-mount
ceramic package operating from DC - 8 GHz. It fea-
tures 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 con-
trol RF signal levels over a 30 dB amplitude range.
Applications include AGC circuits and temperature
compensation of multiple gain stages in microwave
radios and test instrumentation.
Electrical Specifications, T_A = +25° C, 50 ohm system
Parameter
Min
Typical
Max
Insertion Loss
DC - 6 GHz
DC - 8 GHz
1.9
2.9
2.1
3.1
Attenuation Range
DC - 8 GHz
30
Return Loss
DC - 8 GHz
10
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
2
8
Input Power for 0.25 dB Compression (0.5 - 8 GHz)
Input Third Order Intercept (0.5 - 8 GHz)
(Two-tone Input Power = -8 dBm Each Tone)
Min. Atten.
+8
-2
Atten. >2 dB
Min. Atten.
+25
Atten. >2 dB
+10
Units
dB
dB
dB
dB
ns
ns
dBm
dBm
dBm
dBm
5 - 78
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Order On-line at www.hittite.com