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Hittite Microwave Corporation

HMC985 Datasheet Preview

HMC985 Datasheet

Gaas mmic voltage

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0
v00.0211
HMC985
Gaas mmic voltage - variable
attenuator, 20 - 50 GHz
Typical Applications
The HMC985 is ideal for:
Point-to-Point Radio
VSAT Radio
Test Instrumentation
Microwave Sensors
Military, ECM & Radar
Functional Diagram
Features
Wide Bandwidth: 20 - 50 GHz
Excellent Linearity: +32 dB Input IP3
Wide Attenuation Range: 35 dB
Die Size: 2.78 x 1.37 x 0.1 mm
General Description
The HMC985 is an absorptive Voltage Variable
Attenuator (VVA) which operates from 20 - 50 GHz and
is ideal in designs where an analog DC control signal
must be used to control RF signal levels over a 35 dB
dynamic range. It features two shunt-type attenuators
which are controlled by two analog voltages, Vctrl1
and Vctrl2. Optimum linearity performance of the
attenuator is achieved by first varying Vctrl1 of the
first attenuation stage from -3V to 0V with Vctrl2 fixed
at -3V. The control voltage of the second attenuation
stage, Vctrl2, should then be varied from -3V to 0V
with Vctrl1 fixed at 0V.
However, if the Vctrl1 and Vctrl2 pins are connected
together it is possible to achieve the full analog
attenuation range with only a small degradation in
input IP3 performance. Applications include AGC
circuits and temperature compensation of multiple
gain stages in microwave point to point and VSAT
radios.
Electrical Specifications, TA = +25 °C, See Test Conditions
Parameter
Condition
20 - 27
Min.
Insertion Loss
27 - 35
35 - 50
20 - 27
25
Attenuation Range
27 - 35
30
35 - 50
35
Input Return Loss
Output Return Loss
Input Third Order Intercept
(two-tone input Power = 10 dBm Each Tone) [1]
[1] VCTR2 = -3, VCTR1 = -2.0 worst case
Typ.
3
3
3.5
30
35
40
13
13
33
Max.
3.5
4
4.5
Units
dB
dB
dB
dB
dB
dB
dB
dB
dBm
0-1
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
Datasheet pdf - http://www.DataSheet4U.net/




Hittite Microwave Corporation

HMC985 Datasheet Preview

HMC985 Datasheet

Gaas mmic voltage

No Preview Available !

www.DataSheet.co.kr
v00.0211
Attenuation vs. Frequency over Vcntl =
Variable, Vcntrl2 = -3V
0
-5
-10
-15
-2.4V
-2.0V
-1.6V
-20
-1.2V
-0.8V
-0.4V
0.0V
-25
20 25 30 35 40 45 50
FREQUENCY (GHz)
Attenuation vs. Vcnrl1
Over Temperature @ 30 GHz, Vctrl2 = -3V
0
-3 +25C
+85C
-55C
-6
-9
-12
-15
-2.4 -2 -1.6 -1.2 -0.8 -0.4
Vctrl1 (V)
0
Attenuation vs. Pin @ 30 GHz
Vctrl1 = Variable, Vctrl2 = -3V
0
-4
-8
-12
-16
-2.4 V
-0.8 V
-20
-2.0 V
-1.6V
-0.4V
0.0 V
-1.2V
-24
0 3 6 9 12 15 18 21 24
INPUT POWER (dBm)
HMC985
Gaas mmic voltage - variable
attenuator, 20 - 50 GHz
Attenuation vs. Frequency over Vcntl1 =
0V, Vctrl2 = Variable
0
-10
-20
-30
-40
-2.4V
-50
-2.0V
-1.6V
-1.2V
-60
-0.8V
-0.4V
0.0V
-70
20 25 30 35 40 45 50
FREQUENCY (GHz)
Attenuation vs. Vcntrl2
Over Temperature @ 30 GHz, Vctrl1 = 0V
0
-5
-10
+25C
+85C
-15 -55C
-20
-25
-30
-35
-40
-45
-2.4 -2 -1.6 -1.2 -0.8 -0.4
Vctrl1 (V)
0
Attenuation vs. Pin @ 30 GHz
Vctrl2 = Variable, Vctrl1 = 0V
0
-2.4 V
-2.0 V
-10
-1.6V
-1.2V
-20
-0.8 V
-0.4V
0.0 V
-30
-40
-50
0 3 6 9 12 15 18 21 24
INPUT POWER (dBm)
0
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
0-2
Datasheet pdf - http://www.DataSheet4U.net/


Part Number HMC985
Description Gaas mmic voltage
Maker Hittite Microwave Corporation
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HMC985 Datasheet PDF






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