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Datasheet: HMC121G8 (Hittite Microwave Corporation)

Gaas Mmic Smt Voltage-variable Attenuator Dc - 8 Ghz

 

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Hittite Microwave Corporation
2 - 20
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343
Fax: 978-250-3373
Web Site: www.hittite.com
MICROWAVE CORPORATION
F
EBRUARY
2001
A
TTENU
A
T
ORS
2
SMT
General Description
WIDE BANDWIDTH: DC - 8 GHZ
LOW PHASE SHIFT VS. ATTENUATION
30 dB ATTENUATION RANGE
SIMPLIFIED VOLTAGE CONTROL
The HMC121G8 is an absorptive voltage
variable attenuator provided in a surface-
mount hermetic package. It features an on-
chip reference attenuator 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 amplitude range, such as in AGC
circuits and in temperature compensation of
multiple gain stages. Applications include
military ECM and communications as well
as commercial microwave radios and VSAT.
Features
Guaranteed Performance,
50 ohm system, -55 to +85 deg C
GaAs MMIC SMT VOLTAGE-VARIABLE ATTENUATOR DC - 8 GHz
Parameter
Min.
Typ.
Max.
Units
Insertion Loss
DC - 4 GHz:
1.5
3.0
dB
DC - 8 GHz:
2
3.5
dB
Attenuation Range
25
30
dB
Return Loss
DC - 4 GHz:
10
15
dB
DC - 8 GHz:
7
10
dB
Switching Characteristics
tRISE, tFALL ( 10/90% RF):
3
ns
tON, tOFF (50% CTL to 10/90% RF):
6
ns
Input Power for 0.25dB Comp. ( 0.5 - 8GHz)
Min. Atten:
+10
dBm
Atten. > 2dB:
-2
dBm
Input Third Order Intercept (two - 8 dBm signals)
Min. Atten:
+25
dBm
Atten. > 2dB:
+10
dBm
HMC121G8
2 - 21
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343
Fax: 978-250-3373
Web Site: www.hittite.com
MICROWAVE CORPORATION
F
EBRUARY
2001
2
A
TTENU
A
T
ORS
SMT
-40
-30
-20
-10
0
ATTENUATION (dB)
0
2
4
6
8
10
FREQUENCY (GHz)
-5
-4
-3
-2
-1
0
INSERTION LOSS (dB)
0
2
4
6
8
10
FREQUENCY (GHz)
-30
-20
-10
0
RETURN LOSS (dB)
0
2
4
6
8
10
FREQUENCY (GHz)
-3
-2.5
-2
-1.5
-1
-0.5
0
CONTROL VOLTAGE
0
5
10
15
20
25
30
RELATIVE ATTENUATION (dB)
V1
V2
-5
0
5
10
15
20
25
30
35
40
45
RELATIVE PHASE (DEG)
0
2
4
6
8
10
FREQUENCY (GHz)
18 dB
12 dB
9 dB
3 dB
Insertion Loss
Relative Attenuation
Return Loss
Relative Attenuation vs.
Control Voltage
Relative Phase
HMC121G8 SMT VOLTAGE-VARIABLE ATTENUATOR DC - 8 GHz
HMC121G8
2 - 22
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343
Fax: 978-250-3373
Web Site: www.hittite.com
MICROWAVE CORPORATION
F
EBRUARY
2001
A
TTENU
A
T
ORS
2
SMT
25
30
35
40
45
50
55
60
65
0
0.1
1
10
SECOND
H
ARM
O
NI
C
(
dBc)
FREQUENCY (GHz)
3 dB
6 dB
10 dB
Reference
10
20
30
40
50
60
0
0.1
1
10
SECOND
O
RDER
I
NTERCEPT
(
d
Bm
)
FREQUENCY (GHz)
3 dB
6 dB
10 dB
Reference
5
10
15
20
25
30
0
0.1
1
10
THI
R
D
O
RDER
I
NTERCEPT
(
d
Bm)
FREQUENCY (GHz)
3 dB
6 dB
10 dB
Reference
0
5
10
15
20
0
0.1
1
10
1
d
B
C
OM
PRESSI
ON
(
d
Bm
)
FREQUENCY (GHz)
6 dB
10 dB
Reference
-10
-5
0
5
10
15
0
0.1
1
10
0.
25
dB
COM
P
RESSI
ON
(
d
Bm
)
FREQUENCY (GHz)
6 dB
10 dB
Reference
HMC121G8 SMT VOLTAGE-VARIABLE ATTENUATOR DC - 8 GHz
Input Third Order
Intercept vs. Attenuation
Input Second Order
Intercept vs. Attenuation
Second Harmonic
vs. Attenuation
0.25 dB Compression
vs. Attenuation
1 dB Compression
vs. Attenuation
HMC121G8
2 - 23
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343
Fax: 978-250-3373
Web Site: www.hittite.com
MICROWAVE CORPORATION
F
EBRUARY
2001
2
A
TTENU
A
T
ORS
SMT
HMC121G8 SMT VOLTAGE-VARIABLE ATTENUATOR DC - 8 GHz
PIN 1
RF2
CASE BOTTOM IS GROUND
V2
I
O
V1
0.070 +/-0.020
ORIENTATION TAB
GND
GND
RFI
0.180 SQ
0.150
0.400
(4.57 SQ)
(3.81)
MAX
(10.16)
MAX
0.050
0.015 +/-0.003
TYP
(1.27)
TYP
(0.38 +/-0.08)
8 PLCS
0.005 +/-0.002
0.070
(0.13 +/-0.05)
8 PLCS
(1.78)
MAX
(1.78 +/-0.51)
8 PLCS
0.004
0.10
COPLANARITY
PIN 8
HMC
121G8
V1
O
I
V2
RF2
RF1
50
50
500
500
500
500
Schematic
Absolute Maximum Ratings
RF Input
+16dBm
Control Voltage Range
+1.0 to -6.0 Vdc
Storage Temperature
-65 to +150 deg C
Operating Temperature
-55 to +125 deg C
Outline Drawing
1. MATERIAL:
A) PACKAGE BODY - ALUMINA LOADED BOROSILICATE GLASS
B) LEADS, BASE, & COVER - ASTM F - 15 ALLOY
2. PLATING: ELECTROLYTIC GOLD 50 MICRO INCHES MINIMUM
3. DIMENSIONS ARE IN INCHES (MILLIMETERS), UNLESS OTHERWISE SPECIFIED
TOL. ARE 0.005(0.13)
HMC121G8
2 - 24
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343
Fax: 978-250-3373
Web Site: www.hittite.com
MICROWAVE CORPORATION
F
EBRUARY
2001
A
TTENU
A
T
ORS
2
SMT
Single-Line Control Driver
External op-amp control circuit maintains impedance match while attenuation is varied. Input control ranges
from 0 Volts (min. attenuation) to -2.5 Volts (max. attenuation.)
V1
O
I
V2
RF2
RF1
50
50
500
500
500
500
3.9K
3.9K
500
+5V
-5V
500
CTL
1N4148
TL321
OR EQUIVALENT
HMC121G8 SMT VOLTAGE-VARIABLE ATTENUATOR DC - 8 GHz
HMC121G8
2 - 25
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343
Fax: 978-250-3373
Web Site: www.hittite.com
MICROWAVE CORPORATION
F
EBRUARY
2001
2
A
TTENU
A
T
ORS
SMT
NOTES:
HMC121G8 SMT VOLTAGE-VARIABLE ATTENUATOR DC - 8 GHz
HMC121G8
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