HMC-C018
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR MODULE, DC - 13 GHz
v00.0306
9
ATTENUATORS - CONNECTORIZED MODULES
Features
0.5 dB LSB Steps to 31.5 dB
CMOS Compatible Serial Data Interface
± 0.3 dB Typical Bit Error
Hermetically Sealed Module
Typical Applications
The HMC-C018 is ideal for:
• Telecom Infrastructure
• Military Radio, Radar & ECM
• Space Systems
• Test Instrumentation
Field Replaceable SMA Connectors
-55 to +85 C Operating Temperature
General Description
The HMC-C018 is a DC to 13 GHz 6-bit GaAs IC
Digital Serial Control Attenuator housed in a miniature
hermetic module. This wideband attenuator features
3.6 dB typical insertion loss, +38 dBm input IP3,
and bit values of 0.5 (LSB), 1, 2, 4, 8, and 16 dB for
a total attenuation of 31.5 dB. Attenuation accuracy
is excellent with ±0.3 dB typical step error. A six
bit CMOS compatible serial control word is used to
select each attenuation state and a single VDC bias
of -5V allows operation at frequencies down to DC.
Removable SMA connectors can be detached to
allow direct connection of the module’s I/O pins to a
microstrip or coplanar circuit.
Functional Diagram
Electrical Specifications,
T
A
= +25° C, With VDC = -5V and 0/+5V CMOS Control
Parameter
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy: (Referenced to Insertion Loss)
All States
0.5 - 27.5 dB
28.0 - 31.5 dB
All States
Input Power for 0.1 dB Compression
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON/tOFF (50% CTL to 10/90% RF)
REF State
All Other States
Frequency (GHz)
DC - 4.0 GHz
4.0 - 8.0 GHz
8.0 - 13 .0 GHz
DC - 13.0 GHz
DC - 8.0 GHz
8.0 - 13.0 GHz
DC - 3.0 GHz
3.0 - 10.0 GHz
3.0 - 10.0 GHz
10.0 - 13.0 GHz
1.0 - 13.0 GHz
1.0 - 13.0 GHz
DC - 13.0 GHz
600
700
ns
ns
Min.
Typ.
3.2
3.6
5.0
31.5
15
10
± (0.2 + 3% of Atten. Setting) Max
± (0.4 + 3% of Atten. Setting) Max
± (0.5 + 6% of Atten. Setting) Max
± (0.6 + 6% of Atten. Setting) Max
22
46
32
Max.
3.7
4.1
6.0
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
9 - 80
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC-C018
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR MODULE, DC - 13 GHz
Return Loss RF1, RF2
Insertion Loss
0
-1
INSERTION LOSS (dB)
-2
RETURN LOSS (dB)
-3
-4
-5
-6
-7
-8
-9
-10
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
FREQUENCY (GHz)
-30
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
FREQUENCY (GHz)
+25 C
+85 C
-55 C
v00.0306
(Only Major States are Shown)
0
-5
4 dB 1 dB
31.5 dB
I.L 0.5 dB
8 dB
16 dB
9
ATTENUATORS - CONNECTORIZED MODULES
-10
-15
-20
-25
2 dB
Normalized Attenuation
(Only Major States are Shown)
0
NORMALIZED ATTENUATION (dB)
-5
-10
-15
-20
-25
-30
-35
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
FREQUENCY (GHz)
Bit Error vs. Attenuation State
2
1.5
1
BIT ERROR (dB)
0.5
0
-0.5
-1
-1.5
-2
0
4
8
12
16
20
24
28
32
ATTENUATION STATE (dB)
0.1 GHz
13 GHz
8 GHz
4 GHz
Bit Error vs. Frequency
(Only Major States are Shown)
3
2.5
2
1.5
BIT ERROR (dB)
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
-3
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
FREQUENCY (GHz)
0.5-16 dB
Relative Phase vs. Frequency
(Only Major States are Shown)
80
70
RELATIVE PHASE (deg)
31.5 dB
60
50
40
30
20
10
0
-10
-20
0
1
2
3
4
5
6
7
8
0.5 - 4 dB
9 10 11 12 13 14 15
31.5 dB
16 dB
8 dB
FREQUENCY (GHz)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
9 - 81
HMC-C018
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR MODULE, DC - 13 GHz
v00.0306
9
ATTENUATORS - CONNECTORIZED MODULES
Worst Case Step Error
Between Successive Attenuation States
1
Absolute Maximum Ratings
Digital Inputs (Reset, Shift Clock,
Latch Enable & Serial Input)
Bias Voltage (VDC)
Storage Temperature
-0.5V to +5.5V
-7.0 Vdc
-65 to + 150 °C
-55 to +85 °C
+25 dBm
0.5
STEP ERROR (dB)
0
Operating Temperature
RF Input Power (0.5 - 13.0 GHz)
-0.5
-1
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
FREQUENCY (GHz)
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Bias Voltage & Current
VDC Range= -5.0 Vdc ± 10%
VDC
-5.0
Idc (Typ.)
(mA)
5
Idc (Max.)
(mA)
9
CMOS Control Voltages
State
Low
High
Bias Condition
0 to +1.3V
+3.5 to +5.0V
Serial Input Truth Table
Latch
Enable
X
X
X
Shift
Clock
X
Reset
L
H
H
Function
Truth Table
Serial Control Input
C0.5
Shift register cleared
Shift register clocked
H
L
H
H
H
H
H
L
H
H
L
H
H
H
H
L
H
H
H
L
H
H
H
L
H
H
H
H
L
H
H
L
H
H
H
H
H
L
H
L
H
H
H
H
H
H
L
L
C1
C2
C4
C8
C16
Attenuation
Settings
RF1 - RF2
Reference I.L.
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
Contents of shift register
transferred to Digital
Attenuator
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
9 - 82
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC-C018
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR MODULE, DC - 13 GHz
v00.0306
Timing
Parameter
Serial Input Setup
Time
Hold time from Serial
Input to Shift Clock
Setup time from Shift
Clock to Latch Enable
Propagation delay,
Latch Enable to C0.5
through C8
Setup time from Reset
to Shift Clock
Clock Frequency
(1/tclk)
Symbol
ts
th
tlsup
Min.
20
0
40
Max.
-
-
-
Units
ns
ns
ns
9
ATTENUATORS - CONNECTORIZED MODULES
tpd
-
30
ns
-
fclk
20
-
-
30
ns
MHz
Timing Diagram
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
9 - 83
HMC-C018
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
SERIAL CONTROL ATTENUATOR MODULE, DC - 13 GHz
v00.0306
9
ATTENUATORS - CONNECTORIZED MODULES
Logic / Functional Diagram
9 - 84
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
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