HMC424LH5
v02.0909
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
5
ATTENUATORS - DIGITAL - SMT
Typical Applications
The HMC424LH5 is ideal for:
• Telecom Infrastructure
• Military Radio, Radar & ECM
• Space Systems
• Test Instrumentation
Features
0.5 dB LSB Steps to 31.5 dB
Single Control Line Per Bit
± 0.3 dB Typical Bit Error
Hermetic SMT Package, 25mm
2
Screening to MIL-PRF-38535 (Class B or S) Available
Functional Diagram
General Description
The HMC424LH5 is a broadband 6-bit GaAs MMIC
digital attenuator housed in a hermetic SMT leadless
package. Covering DC to 13 GHz, the insertion loss is
less than 3.5 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. A single Vee
bias of -5V allows operation at frequencies down to
DC. The HMC424LH5 is compatible with standard and
lead free surface mount manufacturing techniques
and is suitable for high reliability military, industrial
and space applications.
Electrical Specifi cations,
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)
0.5 - 16.5 dB States
17 - 31.5 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)
REF State
All Other States
DC - 13.0 GHz
DC - 13.0 GHz
1.0 - 13.0 GHz
1.0 - 13.0 GHz
DC - 13.0 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 - 4 GHz
4.0 - 8.0 GHz
8.0 - 13.0 GHz
DC - 13.0 GHz
DC - 13.0 GHz
Min.
Typ.
2.7
3.3
4.2
31.5
12
Max.
3.2
3.8
4.7
Units
dB
dB
dB
dB
dB
5 - 104
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
HMC424LH5
v02.0909
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
Return Loss RF1, RF2
Insertion Loss
0
(Only Major States are Shown)
0
5
31.5 dB
0.5 dB
INSERTION LOSS (dB)
-2
RETURN LOSS (dB)
-5
8 dB
1 dB
I.L 2 dB
4 dB
16 dB
-4
+25 C
+85 C
-40 C
-10
-6
-15
-8
-20
-10
0
3
6
9
12
15
FREQUENCY (GHz)
-25
0
3
6
9
12
15
FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
0
NORMALIZED ATTENUATION (dB)
-5
-10
-15
-20
-25
-30
-35
0
3
6
9
12
15
FREQUENCY (GHz)
-2
0
4
8
12
16
20
24
28
32
ATTENUATION STATE (dB)
1
BIT ERROR (dB)
Bit Error vs. Attenuation State
2
0
-1
0.1 GHz
4 GHz
8 GHz
13 GHz
Bit Error vs. Frequency
(Only Major States are Shown)
2
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)
60
1
BIT ERROR (dB)
RELATIVE PHASE (deg)
40
31.5 dB
0
20
16 dB
8 dB
-1
0
0.5 - 4 dB
-2
0
3
6
9
12
15
FREQUENCY (GHz)
-20
0
3
6
9
12
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
5 - 105
ATTENUATORS - DIGITAL - SMT
HMC424LH5
v02.0909
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
5
ATTENUATORS - DIGITAL - SMT
Worst Case Step Error
Between Successive Attenuation States
2
Bias Voltage & Current
Vee Range= -5 Vdc ± 10%
Vee
(VDC)
-5.0
Iee (Typ.)
(mA)
3
Iee (Max.)
(mA)
5
1
STEP ERROR (dB)
0
Control Voltage
-1
State
Low
-2
0
3
6
9
12
15
FREQUENCY (GHz)
Bias Condition
0 to -3V @ 35 μA Typ.
Vee to Vee +0.8V @ 5 μA Typ.
High
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.
5 - 106
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
HMC424LH5
v02.0909
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
Absolute Maximum Ratings
Control Voltage (V1 to V6)
Bias Voltage (Vee)
Channel Temperature
Thermal Resistance
Continuous Pdiss (T= 85 °C)
(derate 2.9 mW/ °C above 85 °C)
Storage Temperature
Operating Temperature
RF Input Power (0.5 - 13 GHz)
Vee - 0.5 Vdc
-7 Vdc
150 °C
344 °C/W
0.18 W
-65 to + 150 °C
-40 to +85 °C
+25 dBm
5
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
NOTES:
1. PACKAGE BODY MATERIAL: CERAMIC & KOVAR
2. LEAD AND GROUND PADDLE PLATING: GOLD 40 - 80 MICROINCHES.
3. DIMENSIONS ARE IN INCHES [MILLIMETERS].
4. LEAD SPACING TOLERANCE IS NON-CUMULATIVE
5. PAD BURR LENGTH 0.15mm MAX.
PAD BURR HEIGHT 0.25mm MAX.
6. 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:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
5 - 107
ATTENUATORS - DIGITAL - SMT
HMC424LH5
v02.0909
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
5
ATTENUATORS - DIGITAL - SMT
Pin Description
Pad Number
1, 9
Function
RF1, RF2
Description
This pin is DC coupled and matched to 50 Ohm. Blocking capaci-
tors are required if RF line potential is not equal to 0V.
Interface Schematic
2-7
V6 - V1
See truth table and control voltage table.
8, 10, 12
GND
Package base must also be connected to RF ground
11
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.
5 - 108
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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