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HMC335G16
v00.1102
Typical Applications
Features
The HMC335G16 is ideal for:
1 dB LSB Steps to 31 dB
• Telecom Infrastructure
Single Control Line Per Bit
• Military Radios, Radar & ECM
± 0.5 dB Typical Bit Error
• Space Applications
16 Lead Hermetic SMT Package
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• Test Instrumentation
Functional Diagram
General Description
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The HMC335G16 is a broadband 5-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 2.3 dB typical. The attenuator bit values are 1 (LSB), 2, 4, 8, and 16 dB for a
total attenuation of 31 dB. Attenuation accuracy is
excellent at ±0.5 dB typical with an IIP3 of up to +44
dBm. Five bit 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 down to DC.
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ATTENUATORS - SMT
5
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Electrical Specifi cations, TA = +25° C, Vee = -5V & Vctl = 0/Vee
Parameter
Typical
Max.
Units
DC - 1.5 GHz
1.5 - 3.0 GHz
2.0
2.3
2.5
2.8
dB
dB
Attenuation Range
DC - 3 GHz
31
dB
Return Loss (RF1 & RF2, All Atten. States)
DC - 3 GHz
13
dB
Attenuation Accuracy: (Referenced to Insertion Loss)
1 - 31 dB States
1 - 27 dB States
28 - 31 dB States
1 - 23 dB States
24 - 27 dB States
28 - 31 dB States
DC - 1.0 GHz
1.0 - 2.0 GHz
1.0 - 2.0 GHz
2.0 - 3.0 GHz
2.0 - 3.0 GHz
2.0 - 3.0 GHz
± 0.3 + 5% of Atten. Setting Max
± 0.3 + 5% of Atten. Setting Max
± 0.3 + 8% of Atten. Setting Max
± 0.3 + 5% of Atten. Setting Max
± 0.3 + 8% of Atten. Setting Max
± 0.5 + 10% of Atten. Setting Max
dB
dB
dB
dB
dB
dB
Input Power for 0.1 dB Compression
0.5 - 3.0 GHz
24
dBm
Input Third Order Intercept Point
(Two-tone Input Power = 0 dBm Each Tone)
0.5 - 3.0 GHz
44
dBm
DC - 3 GHz
140
160
ns
ns
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Insertion Loss
Frequency
Min.
Switching Characteristics
tRISE, tFALL (10/90% RF)
tON, tOFF (50% CTL to 10/90% RF)
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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
HMC335G16
v00.1102
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
(Only Major States are Shown)
0
-1
-5
RETURN LOSS (dB)
0
-2
+25C
+85C
-40C
-4
-5
8 dB
16 dB
31 dB
-10
-15
-20
-25
-30
-6
-35
0
0.5
1
1.5
2
2.5
3
3.5
4
0
0.5
1
1.5
2
2.5
Normalized Attenuation
4
24
28
32
3.5
4
3
0
-5
2
-15
-20
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-10
1 dB
2 dB
4 dB
-25
-30
-35
0
0.5
1
8 dB
16 dB
31 dB
1.5
2
2.5
3
3.5
1
0
-1
0.12 GHz
1.0 GHz
2.0 GHz
3.0 GHz
-2
-3
0
4
4
8
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12
16
20
ATTENUATION STATE (dB)
FREQUENCY (GHz)
Bit Error vs. Frequency
Relative Phase vs. Frequency
(Only Major States are Shown)
(Only Major States are Shown)
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RELATVIE PHASE (deg)
1
-1
1 dB
2 dB
4 dB
-3
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
80
3
BIT ERROR (dB)
3.5
Bit Error
vs. Attenuation State
(Only Major States are Shown)
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3
FREQUENCY (GHz)
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FREQUENCY (GHz)
NORMALIZED ATTENUATION (dB)
1 dB
2 dB
4 dB
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-3
BIT ERROR (dB)
INSERTION LOSS (dB)
Insertion Loss
ATTENUATORS - SMT
5
Return Loss RF1, RF2
8 dB
16 dB
31 dB
60
40
20
0
-5
-20
0
0.5
1
1.5
2
2.5
FREQUENCY (GHz)
3
3.5
4
0
0.5
1
1.5
2
2.5
3
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
5 - 73
HMC335G16
v00.1102
5
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Worst Case Step Error
Between Successive Attenuation States
Absolute Maximum Ratings
2
1
0
Control Voltage (V1 - V5)
Vee - 0.5 Vdc
Bias Voltage (Vee)
-7.0 Vdc
Storage Temperature
-65 to +150 °C
Operating Temperature
-40 to +85 °C
RF Input Power (0.5 - 3 GHz)
+26 dBm
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STEP ERROR (dB)
-1
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
-2
-3
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Bias Voltage & Current
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ATTENUATORS - SMT
3
Truth Table
Control Voltage Input
Vee Range = -5.0 Vdc ± 10%
V5
1 dB
Attenuation
State
RF1 - RF2
Low
Low
Reference I.L.
Low
High
1 dB
High
Low
2 dB
High
Low
Low
4 dB
Low
Low
Low
8 dB
Low
Low
Low
Low
16 dB
High
High
High
High
31 dB
Max. Atten.
lee (Typ.) (mA)
lee (Max.) (mA)
-5.0
3
6
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
Low
High
High
High
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Vee (VDC)
V1
16 dB
Control Voltage
State
Low
High
Bias Condition
0 to -2V @ 70 µA Typ.
V2
8 dB
V3
4 dB
V4
2 dB
Vee to Vee + 0.8V @ 5 µA Typ.
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
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Note: Vee = -5V ± 10%
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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
HMC335G16
v00.1102
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
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ATTENUATORS - SMT
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Outline Drawing
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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.
Pin Descriptions
Function
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Pin Number
Description
1
Vee
Supply Voltage -5V ±10%
2, 4-9, 11
GND
Package bottom must also be connected to RF ground.
3, 10
RF1, RF2
These pins are DC coupled and matched to 50 Ohm.
Blocking capacitors are required.
12-16
V1-V5
See truth table and control voltage table.
Interface Schematic
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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HMC335G16
v00.1102
Application Circuit
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ATTENUATORS - SMT
5
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
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DC Blocking Capacitors C1 & C2 are required on RF1 & RF2. Choose C1 = C2 = 100 pF ~ 0.1 uF to allow lowest customer
specifi c frequency to pass with minimal loss. R1= 5K Ohm is required to supply voltage to the circuit through either Pin 3
or Pin 10.
Suggested Driver Circuit
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(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 - V5 control lines.
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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
HMC335G16
v00.1102
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
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ATTENUATORS - SMT
5
Evaluation PCB
* R2 - R6 = 100 Ohm.
These resistors are optional and may be
used to enhance decoupling of the RF
path from the control inputs.
List of Materials for Evaluation PCB 106568 [1]
Description
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Item
J1 - J2
PCB Mount SMA Connector
J3
DC Connector
R1
5k Ohm Resistor 0402 Pkg.
R2 - R6
100 Ohm Resistor, 0402 Pkg.
C1, C2
0402 Chip Capacitor,
Select Value for Lowest Frequency of Operation
C3
1000pF Capacitor, 0603 Pkg.
U1
HMC335G16 Digital Attenuator
PCB [2]
106467 Evaluation PCB
The circuit board used in the final application should
use RF circuit design techniques. Signal lines
should have 50 ohm impedance while the package
ground leads and package bottom should be connected directly to the ground plane similar to that
shown. A sufficient number of via holes should be
used to connect the top and bottom ground planes.
The evaluation circuit board shown is available from
Hittite upon request.
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
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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