HMC335G16
v00.1102
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
5
ATTENUATORS - SMT
Typical Applications
The HMC335G16 is ideal for:
• Telecom Infrastructure
• Military Radios, Radar & ECM
• Space Applications
• Test Instrumentation
Features
1 dB LSB Steps to 31 dB
Single Control Line Per Bit
± 0.5 dB Typical Bit Error
16 Lead Hermetic SMT Package
Functional Diagram
General Description
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 attenu-
ator 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.
Electrical Specifi cations,
T
A
= +25° C, Vee = -5V & Vctl = 0/Vee
Parameter
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
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
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)
DC - 3 GHz
140
160
ns
ns
Frequency
DC - 1.5 GHz
1.5 - 3.0 GHz
DC - 3 GHz
DC - 3 GHz
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
0.5 - 3.0 GHz
0.5 - 3.0 GHz
Min.
Typical
2.0
2.3
31
13
± 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
24
44
Max.
2.5
2.8
Units
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
5 - 72
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
Return Loss RF1, RF2
Insertion Loss
0
-1
INSERTION LOSS (dB)
(Only Major States are Shown)
0
-5
RETURN LOSS (dB)
-10
-15
-20
-25
-30
-35
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
5
ATTENUATORS - SMT
5 - 73
-2
-3
-4
-5
-6
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
+25C
+85C
-40C
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
-15
-20
-25
-30
-35
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Bit Error
vs. Attenuation State
3
2
BIT ERROR (dB)
1
0
-1
-2
-3
0
4
8
12
16
20
24
28
32
ATTENUATION STATE (dB)
0.12 GHz
1.0 GHz
2.0 GHz
3.0 GHz
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
Bit Error vs. Frequency
(Only Major States are Shown)
5
Relative Phase vs. Frequency
(Only Major States are Shown)
100
80
RELATVIE PHASE (deg)
60
40
20
0
-20
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
3
BIT ERROR (dB)
1
-1
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
-3
-5
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
0
0.5
1
1.5
2
2.5
3
3.5
4
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
HMC335G16
v00.1102
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
5
ATTENUATORS - SMT
Worst Case Step Error
Between Successive Attenuation States
3
2
STEP ERROR (dB)
1
0
-1
-2
-3
0
0.5
1
1.5
2
2.5
3
3.5
4
FREQUENCY (GHz)
Absolute Maximum Ratings
Control Voltage (V1 - V5)
Bias Voltage (Vee)
Storage Temperature
Operating Temperature
RF Input Power (0.5 - 3 GHz)
Vee - 0.5 Vdc
-7.0 Vdc
-65 to +150 °C
-40 to +85 °C
+26 dBm
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Bias Voltage & Current
Vee Range = -5.0 Vdc
±
10%
Vee (VDC)
-5.0
lee (Typ.) (mA)
3
lee (Max.) (mA)
6
Truth Table
Control Voltage Input
V1
16 dB
Low
Low
V2
8 dB
Low
Low
Low
Low
High
Low
High
V3
4 dB
Low
Low
Low
High
Low
Low
High
V4
2 dB
Low
Low
High
Low
Low
Low
High
V5
1 dB
Low
High
Low
Low
Low
Low
High
Attenuation
State
RF1 - RF2
Reference I.L.
1 dB
2 dB
4 dB
8 dB
16 dB
31 dB
Max. Atten.
Control Voltage
State
Low
High
Bias Condition
0 to -2V @ 70 µA Typ.
Vee to Vee + 0.8V @ 5 µA Typ.
Low
Low
Low
High
High
Note: Vee = -5V
±
10%
Any combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
5 - 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
HMC335G16
v00.1102
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Outline Drawing
5
ATTENUATORS - SMT
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
Pin Number
1
Function
Vee
Description
Supply Voltage -5V ±10%
Interface Schematic
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.
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 - 75
HMC335G16
v00.1102
1dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
5
ATTENUATORS - SMT
Application Circuit
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
(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.
5 - 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
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