HMC121C8 Datasheet, PDF (1/6 Pages) Hittite Microwave Corporation – GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR DC - 10 GHz

MICROWAVE CORPORATION
HMC121C8
GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR DC - 10 GHz
FEBRUARY 2001
Features
General Description
V03.0400
WIDE BANDWIDTH: DC - 10 GHz
LOW PHASE SHIFT VS. ATTENUATION
2 ^{25 dB ATTENUATION RANGE}
SIMPLIFIED VOLTAGE CONTROL
The HMC121C8 is an absorptive Voltage
Variable Attenuator (VVA) in a non-hermetic
surface-mount package covering DC - 10
GHz. It features an on-chip reference at-
tenuator 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 25 dB
amplitude range. Applications include AGC
circuits and temperature compensation of
multiple gain stages in microwave point-to-
point and VSAT radios. See HMC121G8
for a hermetic SMT version of this device.
Guaranteed Performance, 50 ohm system, -55 to +85 deg C
Parameter
Min
Typical
Max
Inse rtion L oss
DC - 6 GHz :
DC - 8 GHz :
DC - 10 GHz :
2.0
2.5
2.2
3.2
3.5
4.5
Attenuation Range
DC - 6 GHz:
20
25
DC - 10 GHz :
25
30
Return Loss
DC - 8 GHz:
11
15
DC - 10 GHz :
8
12
Switching Characteristics
tRISE, tFALL (10/90% RF):
3
tON, tOFF (50% CTL to 10/90% RF):
6
Input Power for 0.25 dB C ompre ssion
Min. Atten:
+3
(0.5 - 10 GHz)
Atten. >2 dB:
-3
Input Third Order Intercept (two - 8 dBm
Min. Atten:
+18
signals, 0.5 - 10 GHz)
+10
Units
dB
dB
dB
dB
dB
dB
ns
ns
dBm
dBm
dBm
dBm
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone]
2 - 14
Fax: [phone]
Web Site: www.hittite.com