HITTITE HMC424LH5_09

HMC424LH5
v02.0909
ATTENUATORS - DIGITAL - SMT
5
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
Typical Applications
Features
The HMC424LH5 is ideal for:
0.5 dB LSB Steps to 31.5 dB
• Telecom Infrastructure
Single Control Line Per Bit
• Military Radio, Radar & ECM
± 0.3 dB Typical Bit Error
• Space Systems
Hermetic SMT Package, 25mm2
Screening to MIL-PRF-38535 (Class B or S) Available
• Test Instrumentation
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, TA = +25° C, With Vee = -5V & VCTL= 0/-5V
Parameter
Frequency (GHz)
Typ.
Max.
Units
Insertion Loss
DC - 4 GHz
4.0 - 8.0 GHz
8.0 - 13.0 GHz
Min.
2.7
3.3
4.2
3.2
3.8
4.7
dB
dB
dB
Attenuation Range
DC - 13.0 GHz
31.5
dB
Return Loss (RF1 & RF2, All Atten. States)
DC - 13.0 GHz
12
dB
DC - 13.0 GHz
DC - 13.0 GHz
± 0.4 + 4% of Atten. Setting Max
± 0.5 + 5% of Atten. Setting Max
dB
dB
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)
5 - 104
REF State
All Other States
1.0 - 13.0 GHz
22
dBm
1.0 - 13.0 GHz
46
32
dBm
dBm
30
50
ns
ns
DC - 13.0 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
HMC424LH5
v02.0909
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
(Only Major States are Shown)
0
-2
-5
RETURN LOSS (dB)
INSERTION LOSS (dB)
0
-4
+25 C
+85 C
-40 C
-6
-8
8 dB
-10
I.L 2 dB
1 dB
16 dB
4 dB
31.5 dB
0.5 dB
-15
-20
-10
-25
0
3
6
9
12
15
0
3
6
FREQUENCY (GHz)
9
12
15
FREQUENCY (GHz)
Normalized Attenuation
Bit Error vs. Attenuation State
(Only Major States are Shown)
2
-5
1
-10
BIT ERROR (dB)
NORMALIZED ATTENUATION (dB)
0
-15
-20
-25
0
0.1 GHz
4 GHz
8 GHz
13 GHz
-1
-30
-35
-2
0
3
6
9
12
0
15
4
8
12
16
20
24
28
32
ATTENUATION STATE (dB)
FREQUENCY (GHz)
Bit Error vs. Frequency
Relative Phase vs. Frequency
(Only Major States are Shown)
(Only Major States are Shown)
2
60
8 dB
16 dB
31.5 dB
RELATIVE PHASE (deg)
0.5 dB
1 dB
2 dB
4 dB
1
BIT ERROR (dB)
ATTENUATORS - DIGITAL - SMT
5
Return Loss RF1, RF2
Insertion Loss
0
-1
31.5 dB
40
16 dB
20
8 dB
0
0.5 - 4 dB
-2
-20
0
3
6
9
FREQUENCY (GHz)
12
15
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
HMC424LH5
v02.0909
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
5
Worst Case Step Error
Between Successive Attenuation States
Bias Voltage & Current
Vee Range= -5 Vdc ± 10%
1
STEP ERROR (dB)
ATTENUATORS - DIGITAL - SMT
2
Vee
(VDC)
Iee (Typ.)
(mA)
Iee (Max.)
(mA)
-5.0
3
5
0
Control Voltage
-1
-2
0
3
6
9
12
15
State
Bias Condition
Low
0 to -3V @ 35 μA Typ.
High
Vee to Vee +0.8V @ 5 μA Typ.
FREQUENCY (GHz)
Truth Table
Control Voltage Input
Attenuation
State
RF1 - RF2
V1
16 dB
V2
8 dB
V3
4 dB
V4
2 dB
V5
1 dB
V6
0.5 dB
Low
Low
Low
Low
Low
Low
Reference
I.L.
Low
Low
Low
Low
Low
High
0.5 dB
Low
Low
Low
Low
High
Low
1 dB
Low
Low
Low
High
Low
Low
2 dB
Low
Low
High
Low
Low
Low
4 dB
Low
High
Low
Low
Low
Low
8 dB
High
Low
Low
Low
Low
Low
16 dB
High
High
High
High
High
High
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
Control Voltage (V1 to V6)
Vee - 0.5 Vdc
Bias Voltage (Vee)
-7 Vdc
Channel Temperature
150 °C
Thermal Resistance
344 °C/W
Continuous Pdiss (T= 85 °C)
(derate 2.9 mW/ °C above 85 °C)
0.18 W
Storage Temperature
-65 to + 150 °C
Operating Temperature
-40 to +85 °C
RF Input Power (0.5 - 13 GHz)
+25 dBm
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
ATTENUATORS - DIGITAL - SMT
5
Absolute Maximum Ratings
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
HMC424LH5
v02.0909
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
ATTENUATORS - DIGITAL - SMT
5
Pin Description
Pad Number
Function
Description
1, 9
RF1, RF2
This pin is DC coupled and matched to 50 Ohm. Blocking capacitors are required if RF line potential is not equal to 0V.
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%
Interface Schematic
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
HMC424LH5
v02.0909
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 13 GHz
5
ATTENUATORS - DIGITAL - SMT
Evaluation PCB
List of Materials for Evaluation PCB 110855 [1]
Item
Description
J1 - J2
PCB Mount SMA SRI Connector
J3
8 Pin DC Connector .1” Thruhole
C1
0.01 μF Capacitor, 0603 Pkg.
U1
HMC424LH5 Digital Attenuator
PCB [2]
110853 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
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 exposed paddle 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.
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 - 109