v01.0404
MICROWAVE CORPORATION
HMC424G16
Features
0.5 dB LSB Steps to 31.5 dB
Single Control Line Per Bit
±0.5 to ±0.8 dB Typical Bit Error
16 Lead Hermetic SMT Package
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Typical Applications
The HMC424G16 is ideal for:
9
ATTENUATORS - SMT
• Telecom Infrastructure
• Military Radios, Radar & ECM
• Space Applications
• Test Instrumentation
Functional Diagram
General Description
The HMC424G16 is a broadband 6-bit GaAs IC
digital attenuator in a 16 lead glass/metal (hermetic)
surface mount package. Covering DC to 3 GHz,
the insertion loss is less than 3 dB typical. The
attenuator bit values are 0.5 (LSB), 1, 2, 4, 8, and
16 dB for a total attenuation of 31.5 dB. Attenuation
accuracy is excellent at ±0.5 dB typical step error
with an IIP3 of +32 dBm. Six control voltage inputs,
toggled between 0 and -5V, are used to select each
attenuation state at less than 70 µA each. A single
Vee bias of -5V allows operation at frequencies
down to DC.
Electrical Specifications,
T
A
= +25° C, With Vee = -5V & Vctl = 0/-5V
Parameter
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy: (Referenced to Insertion Loss)
All States
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
DC - 2.0 GHz
2.0 - 3.0 GHz
1.0 - 3.0 GHz
1.0 - 3.0 GHz
DC - 3.0 GHz
30
50
ns
ns
± 0.4 + 4% of Atten. Setting Max
± 0.5 + 5% of Atten. Setting Max
22
46
32
dB
dB
dBm
dBm
dBm
Frequency (GHz)
DC - 3.0 GHz
DC - 3.0 GHz
DC - 3.0 GHz
Min.
Typ.
3.0
31.5
12
Max.
3.6
Units
dB
dB
dB
9 - 80
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
MICROWAVE CORPORATION
v01.0404
HMC424G16
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Return Loss RF1, RF2
Insertion Loss
0
-1
INSERTION LOSS (dB)
(Only Major States are Shown)
0
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
-5
RETURN LOSS (dB)
-2
-3
-4
-5
-6
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
9
-10
+25C
+85C
-40C
-20
-25
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0
NORMALIZED ATTENUATION (dB)
-5
-10
Bit Error vs. Attenuation State
2
1.5
1
BIT ERROR (dB)
0.5
0
-0.5
-1
-1.5
-2
0.14 GHz
1 GHz
2 GHz
3 GHz
-15
-20
-25
-30
-35
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
0
2
4
6
8 10 12 14 16 18 20 22 24 26 28 30 32
ATTENUATION STATE (dB)
Bit Error vs. Frequency
(Only Major States are Shown)
3
2
BIT ERROR (dB)
1
0
-1
-2
-3
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
Relative Phase vs. Frequency
(Only Major States are Shown)
100
80
RELATVIE PHASE (deg)
60
40
20
0
-20
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
9 - 81
ATTENUATORS - SMT
-15
MICROWAVE CORPORATION
v01.0404
HMC424G16
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Worst Case Step Error
Between Successive Attenuation States
2
Bias Voltage & Current
Vee Range= -5.0 Vdc ± 10%
Vee (VDC)
-5.0
Iee (Typ.) (mA)
2
Iee (Max.) (mA)
4
STEP ERROR (dB)
9
ATTENUATORS - SMT
1.5
1
0.5
0
Control Voltage
State
Bias Condition
0 to -2V @ 70 µA Typ.
Vee to Vee +0.8V @ 5 µA Typ.
Low
High
-0.5
-1
-1.5
-2
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
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
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:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
MICROWAVE CORPORATION
v01.0404
HMC424G16
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Absolute Maximum Ratings
Control Voltage (V1 to V6)
Bias Voltage (Vee)
Channel Temperature
Thermal Resistance
Storage Temperature
Operating Temperature
RF Input Power (0.5 - 13.0 GHz)
Vee - 0.5 Vdc
-7.0 Vdc
150 °C
140 °C/W
-65 to + 150 °C
-55 to +85 °C
+25 dBm
9
Outline Drawing
NOTES:
1. PACKAGE MATERIAL: ALUMINA LOADED BOROSILICATE GLASS.
2. LEADS, BASE, COVER MATEIRAL: KOVARTM (#7052 CORNING).
3. PLATING: ELECTROLYTIC GOLD 50 MICROINCHES MIN.,
OVER ELECTROLYTIC NICKEL 75 MICROINCHES MIN.
4. ALL DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. TOLERANCES: 0.005 [.013] UNLESS OTHERWISE SPECIFIED.
6. CHARACTERS TO BE HELVETICA MEDIUM .030 HIGH,
BLACK INK, LOCATED APPROX. AS SHOWN.
7. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED
TO PCB RF GROUND.
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
9 - 83
ATTENUATORS - SMT
MICROWAVE CORPORATION
v01.0404
HMC424G16
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Pin Descriptions
Pin Number
Function
Description
Interface Schematic
9
1, 12-16
V1-V6
See truth table and control voltage table.
ATTENUATORS - SMT
2, 4-6, 8, 9, 11
GND
Package bottom must also be connected to RF/DC ground.
3, 10
RF1, RF2
These pins are DC coupled and matched to 50 Ohm.
Blocking capacitors are required if RF line is not equal to 0V.
7
Vee
Supply Voltage -5V ±10%
Suggested Driver Circuit
(One Circuit Required Per Bit Control Input)
Simple driver using inexpensive standard logic ICs provides fast switching using minimum DC current. * Recommended value
to suppress unwanted RF signals at V1 - V6 control lines.
9 - 84
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order Online at www.hittite.com
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