HITTITE HMC424G16

HMC424G16
v04.0709
ATTENUATORS - DIGITAL - SMT
5
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Typical Applications
Features
The HMC424G16 is ideal for:
0.5 dB LSB Steps to 31.5 dB
• Telecom Infrastructure
Single Control Line Per Bit
• Military Radios, Radar & ECM
±0.5 to ±0.8 dB Typical Bit Error
• Space Applications
16 Lead Hermetic SMT Package
• 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 Specifi cations, TA = +25° C, With Vee = -5V & Vctl = 0/-5V
Typ.
Max.
Units
Insertion Loss
Parameter
Frequency (GHz)
DC - 3 GHz
Min.
3.0
3.6
dB
Attenuation Range
DC - 3 GHz
31.5
dB
Return Loss (RF1 & RF2, All Atten. States)
DC - 3 GHz
12
dB
DC - 2.0 GHz
2.0 - 3.0 GHz
± 0.4 + 4% of Atten. Setting Max
± 0.5 + 5% of Atten. Setting Max
dB
dB
1.0 - 3.0 GHz
22
dBm
1.0 - 3.0 GHz
46
32
dBm
dBm
30
50
ns
ns
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)
5 - 98
REF State
All Other States
DC - 3 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
HMC424G16
v04.0709
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
5
Return Loss RF1, RF2
(Only Major States are Shown)
Insertion Loss
0.5 dB
1 dB
2 dB
4 dB
-5
RETURN LOSS (dB)
INSERTION LOSS (dB)
-1
-2
-3
-4
+25C
+85C
-40C
-5
8 dB
16 dB
31.5 dB
-10
-15
-20
-6
-25
0
0.5
1
1.5
2
2.5
3
3.5
0
4
0.5
1
FREQUENCY (GHz)
1.5
2
2.5
3
3.5
4
28
32
3.5
4
FREQUENCY (GHz)
Normalized Attenuation
(Only Major States are Shown)
Bit Error vs. Attenuation State
2
-5
0.14 GHz
1 GHz
2 GHz
3 GHz
1
-10
-15
0
-20
0.5 dB
1 dB
2 dB
4 dB
-25
-1
0.14 GHz
1 GHz
2 GHz
3 GHz
1
BIT ERROR (dB)
BIT ERROR
(dB)
NORMALIZED
ATTENUATION
(dB)
02
8 dB
16 dB
31.5 dB
0
-1
-30
-2
-35
-2
0
4
0.5
8
1
12
1.5
16
2
20
2.5
24
3
28
3.5
32
4
0
4
8
ATTENUATION
STATE
FREQUENCY
(GHz)(dB)
12
16
20
24
ATTENUATION STATE (dB)
Bit Error vs. Frequency
Relative Phase vs. Frequency
(Only Major States are Shown)
(Only Major States are Shown)
3
100
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
1
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
80
RELATVIE PHASE (deg)
2
BIT ERROR (dB)
ATTENUATORS - DIGITAL - SMT
0
0
0
-1
-2
60
40
20
0
-3
-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 - 99
HMC424G16
v04.0709
5
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Worst Case Step Error
Between Successive Attenuation States
Bias Voltage & Current
Vee Range= -5 Vdc ± 10%
1
STEP ERROR (dB)
ATTENUATORS - DIGITAL - SMT
2
1.5
Vee (VDC)
Iee (Typ.) (mA)
Iee (Max.) (mA)
-5
2
5
0.5
0
Control Voltage
-0.5
-1
State
Bias Condition
-1.5
Low
0 to -3V @ 35 μA Typ.
High
-5 to -4.2V @ 5 μA Typ.
-2
0
0.5
1
1.5
2
2.5
3
3.5
4
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 - 100
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
HMC424G16
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Absolute Maximum Ratings
Control Voltage (V1 to V6)
Vee - 0.5 Vdc
Bias Voltage (Vee)
-7 Vdc
Channel Temperature
150 °C
Thermal Resistance
330 °C/W
Storage Temperature
-65 to + 150 °C
Operating Temperature
-55 to +85 °C
RF Input Power (0.5 - 13.0 GHz)
+25 dBm
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
5
ATTENUATORS - DIGITAL - SMT
v04.0709
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:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
5 - 101
HMC424G16
v04.0709
ATTENUATORS - DIGITAL - SMT
5
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
Pin Descriptions
Pin Number
Function
Description
1, 12-16
V1 - V6
See truth table and control voltage table.
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%
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 - 102
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
HMC424G16
v04.0709
0.5dB LSB GaAs MMIC 6-BIT DIGITAL
ATTENUATOR, DC - 3 GHz
5
ATTENUATORS - DIGITAL - SMT
Evaluation PCB
List of Materials for Evaluation PCB 106566 [1]
Item
Description
J1 - J2
PCB Mount SMA Connector
J3
8 Pin DC Connector
C1
0.01 μF Capacitor, 0603 Pkg.
C2, C3
100 pF Capacitor, 0402 Pkg.
R1 - R6
100 Ohm Resistor, 0603 Pkg.
U1
HMC424G16 Digital Attenuator
PCB [2]
106461 Evaluation PCB
[1] Reference this number when ordering complete 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.
[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
5 - 103