HMC-C025
v00.1205
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR MODULE, DC - 13 GHz
9
ATTENUATORS - CONNECTORIZED MODULES
Features
0.5 dB LSB Steps to 31.5 dB
Single Control Line Per Bit
± 0.3 dB Typical Bit Error
CMOS Compatible Control
Typical Applications
The HMC-C025 is ideal for:
• Telecom Infrastructure
• Military Radio, Radar & ECM
• Space Systems
• Test Instrumentation
Hermetically Sealed Module
Field Replaceable SMA Connectors
-55 to +85 C Operating Temperature
General Description
The HMC-C025 is a DC to 13 GHz 6-bit GaAs IC
Digital Attenuator housed in a miniature hermetic
module. This wideband attenuator features 4 dB typi-
cal 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. Six control voltage inputs, toggled
between 0 and +5V, are used to select each attenu-
ation state. A single Vdc bias of -5V allows operation
at frequencies down to DC. Removable SMA connec-
tors 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 & VCTL = 0/+5V
Parameter
Frequency (GHz)
DC - 4.0 GHz
4.0 - 8.0 GHz
8.0 - 11 .0 GHz
11.0 - 13 .0 GHz
DC - 13.0 GHz
DC - 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
RF State
All Other States
1.0 - 13.0 GHz
DC - 13.0 GHz
22
45
ns
ns
Min.
Typ.
3.2
4.2
5.0
5.5
31.5
12
± (0.2 + 3% of Atten. Setting) Max
± (0.4 + 3% of Atten. Setting) Max
± (0.4 + 4% of Atten. Setting) Max
± (0.6 + 6% of Atten. Setting) Max
22
46
38
Max.
3.7
4.7
5.5
6.0
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
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)
9 - 74
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-C025
v00.1205
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR MODULE, DC - 13 GHz
Return Loss RF1, RF2
Insertion Loss
0
-1
INSERTION LOSS (dB)
-2
(Only Major States are Shown)
0
9
16 dB
31.5 dB
8 dB
-5
RETURN LOSS (dB)
0.5 dB
I.L
-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)
+25 C
+85 C
-40 C
-10
2 dB
4 dB
1 dB
-15
-20
-25
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
FREQUENCY (GHz)
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
13 GHz 8 GHz
4 GHz
0.1 GHz
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)
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
31.5 dB
Relative Phase vs. Frequency
(Only Major States are Shown)
60
50
RELATIVE PHASE (deg)
40
30
20
10
0
-10
0.5 - 4 dB
8 dB
31.5 dB
16 dB
-20
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
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 - 75
ATTENUATORS - CONNECTORIZED MODULES
HMC-C025
v00.1205
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR MODULE, DC - 13 GHz
Bias Voltage & Current
Vdc Range= -5.0 Vdc ± 10%
Vdc
-5.0
Idc (Typ.)
(mA)
5
Idc (Max.)
(mA)
9
9
ATTENUATORS - CONNECTORIZED MODULES
Worst Case Step Error
Between Successive Attenuation States
2
1.5
1
STEP ERROR (dB)
0.5
0
-0.5
-1
-1.5
-2
0
1
2
3
4
5
6
7
8
9 10 11 12 13 14 15
FREQUENCY (GHz)
(Bias current increases with switching rate to 15 - 20 mA)
Control Voltage
(CMOS Compatible)
State
Low
High
Bias Condition
0 to +1.5V @ 5 μA Typ.
+3.5 to +5.0V @ 800 μA Typ.
Truth Table
Control Voltage Input
V1
16 dB
Low
Low
Low
Low
Low
Low
High
High
V2
8 dB
Low
Low
Low
Low
Low
High
Low
High
V3
4 dB
Low
Low
Low
Low
High
Low
Low
High
V4
2 dB
Low
Low
Low
High
Low
Low
Low
High
V5
1 dB
Low
Low
High
Low
Low
Low
Low
High
V6
0.5 dB
Low
High
Low
Low
Low
Low
Low
High
Attenuation
State
RF1 - RF2
Reference
I.L.
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
Absolute Maximum Ratings
Control Voltage (V1 to V6)
Bias Voltage (Vdc)
Storage Temperature
Operating Temperature
RF Input Power (0.5 - 13.0 GHz)
-0.5V to +5.5V
-7.0 Vdc
-65 to + 150 °C
-55 to +85 °C
+25 dBm
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Any combination of the above states will provide
an attenuation approximately equal to the sum of
the bits selected.
9 - 76
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-C025
v00.1205
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR MODULE, DC - 13 GHz
Outline Drawing
9
ATTENUATORS - CONNECTORIZED MODULES
NOTES:
1. PACKAGE, LEADS, COVER MATERIAL: KOVAR™
2. SPACER MATERIAL: ALUMINUM
3. PLATING: ELECTROLYTIC GOLD 50 MICROINCHES MIN., OVER
ELECTROLYTIC NICKEL 75 MICROINCHES MIN.
4. ALL DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. TOLERANCES ±.005 [0.13] UNLESS OTHERWISE SPECIFIED.
6. FIELD REPLACEABLE SMA CONNECTORS.
TENSOLITE 5602 - 5CCSF OR EQUIVALENT.
7. MOUNT MODULE TO SYSTEM PLATFORM WITH #2-56 HARDWARE
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 - 77
HMC-C025
v00.1205
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR MODULE, DC - 13 GHz
9
ATTENUATORS - CONNECTORIZED MODULES
Pin Description
Pin Number
Function
Description
This pin is DC coupled and matched to 50 Ohms.
Blocking capacitors are required if RF line potential
is not equal to 0 Vdc.
Interface Schematic
1
RF1
5, 4, 3, 2, 9, 8
V1 - V6
See truth table and control voltage table.
6
RF2
This pin is DC coupled and matched to 50 Ohms.
Blocking capacitors are required if RF line potential
is not equal to 0 Vdc.
7
Vdc
Supply voltage: -5 Vdc ±10%.
10
GND
Power Supply Ground
9 - 78
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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