HMC121_01 Datasheet, PDF (1/4 Pages) Hittite Microwave Corporation – GaAs MMIC VOLTAGE-VARIABLE ATTENUATOR, DC - 15 GHz

v01.0801
MICROWAVE CORPORATION
HMC121
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, DC - 15 GHz
Typical Applications
• Base Station Infrustructure
• Portable Wireless, CATV & DBS
2
• MMDS & Wireless LAN
• Wireless Local Loop
• Military, Space, & Test Equipment
Functional Diagram
Features
Wide Bandwidth: DC - 15 GHz
Low Phase Shift vs. Attenuation
30 dB Attenuation Range
Simplified Voltage Control
General Description
The HMC121 chip is an absorptive voltage variable
attenuator. It features an on-chip reference atten-
uator for use with an external op-amp to provide
simple single voltage attenuation control. The device
is ideal in designs where an analog control signal
must control RF signal levels over a 30 dB range,
such as AGC circuits and in temperature compensa-
tion of multiple gain stages. See SMT packaged ver-
sions HMC121G8 (hermetic) and HMC121C8 (non
hermetic).
Electrical Specifications, T_A = +25° C, 50 ohm system
Parameter
Insertion Loss
DC - 8 GHz:
DC - 15 GHz:
Attenuation Range
Return Loss
DC - 8 GHz:
DC - 15 GHz:
Switching Characteristics
tRISE, tFALL (10/90% RF):
tON, tOFF (50% CTL to 10/90% RF):
Input Power for 0.25 dB Compression (0.5 - 15 GHz)
Min Atten:
Atten. >2 dB:
Input Third Order Intercept (0.5 - 15 GHz)
(Two - tone Input Power = 8 dBm Each Tone)
Min Atten:
Atten. >2 dB:
Min.
25
13
10
Typ.
1.8
2
30
18
15
3
6
+10
-2
+25
+10
Max. Units
2.8
dB
3.5
dB
dB
dB
dB
ns
ns
dBm
dBm
dBm
dBm
2 - 10
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone]
Visit us at www.hittite.com, or Email at [e-mail]