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HMC939LP4 / 939LP4E
v01.1211
Attenuators - SMT
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Typical Applications
Features
The HMC939LP4 / HMC939LP4E is ideal for:
1.0 dB LSB Steps to 31 dB
• Fiber Optics & Broadband Telecom
Single Positive Control Line Per Bit
• Microwave Radio & VSAT
±1.0 dB Typical Bit Error
• Military Radios, Radar & ECM
High Input IP3: +43 dBm
• Space Applications
16mm2 Leadless SMT Plastic Package
• Sensors
• Test & Measurement Equipment
Functional Diagram
General Description
The HMC939LP4 & HMC939LP4E are broadband
5-bit GaAs IC digital attenuators in low cost leadless
surface mount packages. Covering 0.1 to 33.0 GHz,
the insertion loss is less than 5 dB typical. The attenuator bit values are 1.0 (LSB), 2, 4, 8, 16 for a total attenuation of 31 dB. Attenuation accuracy is excellent
at ±0.4 dB typical step error with an IIP3 of +43 dBm.
Five control voltage inputs, toggled between +5V and
0V, are used to select each attenuation state.
Electrical Specifications, TA = +25° C, With Vdd = +5V, Vss = -5V, P0 - P4 = 0/ +5V
Parameter
Frequency (GHz)
Typ.
Max.
Units
0.1 - 18.0 GHz
18.0 - 26.5 GHz
26.5 - 33.0 GHz
4.0
5.5
6.5
5.5
7.0
8.5
dB
dB
dB
Attenuation Range
0.1 - 33.0 GHz
31
dB
Return Loss (RF1 & RF2, All Atten. States)
0.1 - 33.0 GHz
12
dB
Insertion Loss
Attenuation Accuracy: (Referenced to Insertion Loss)
1.0 - 15 dB States
16 - 31 dB States
16 - 31 dB States
0.1 - 33.0 GHz
0.1 - 20.0 GHz
20.0 - 33.0 GHz
Min.
± (0.5 + 5%) of Atten. Setting Max
± (0.5 + 5%) of Atten. Setting Max
± (0.6 + 8%) of Atten. Setting Max
Input Power for 0.1 dB Compression
0.1 - 0.5 GHz
0.5 - 33.0 GHz
20
25
dBm
dBm
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
0.1 - 0.5 GHz
0.5 - 33.0 GHz
40
43
dBm
dBm
Switching Characteristics
0.1 - 33.0 GHz
60
90
ns
ns
tRISE, tFALL (10/90% RF)
tON/tOFF (50% CTL to 10/90% RF)
1
dB
dB
dB
Idd
0.1 - 33.0 GHz
2.5
4.5
6.5
mA
Iss
0.1 - 33.0 GHz
-7.0
-5.0
-3.0
mA
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or [email protected]
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Normalized Attenuation
Insertion Loss vs. Temperature
(Only Major States are Shown)
0
INSERTION LOSS (dB)
-2
-4
-6
-8
+25 C
+85 C
-40 C
-10
-12
-5
-10
-15
-20
-25
-30
-35
-40
0
5
10
15
20
25
30
35
40
0
5
10
FREQUENCY (GHz)
Input Return Loss
25
30
35
40
30
35
40
30
35
40
(Only Major States are Shown)
0
0
-10
-10
RETURN LOSS (dB)
RETURN LOSS (dB)
20
Output Return Loss
(Only Major States are Shown)
-20
-30
-40
-20
-30
-40
-50
-50
0
5
10
15
20
25
30
35
40
0
5
10
FREQUENCY (GHz)
15
20
25
FREQUENCY (GHz)
Bit Error vs. Frequency
Bit Error vs. Attenuation State
(Only Major States are Shown)
3
2.4
5 GHz
10 GHz
18 GHz
26.5 GHz
33 GHz
1.6
2
BIT ERROR (dB)
2
BIT ERROR (dB)
15
FREQUENCY (GHz)
Attenuators - SMT
NORMALIZED ATTENUATION (dB)
0
1.2
0.8
0.4
0
31 dB
1
0
-1
-2
-0.4
-3
-0.8
0
4
8
12
16
20
ATTENUATION STATE (dB)
24
28
0
5
10
15
20
25
FREQUENCY (GHz)
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or [email protected]
2
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Step Attenuation vs. Attenuation State
0.1 - 18 GHz
Relative Phase vs. Frequency
(Only Major States are Shown)
120
1.6
STEP ATTENUATION (dB)
RELATIVE PHASE (deg)
80
31 dB
60
40
20
1.2
0.8
5 GHz
10 GHz
18 GHz
0.4
0
-20
0
5
10
15
20
25
30
35
0
40
0
FREQUENCY (GHz)
4
8
12
24
28
32
30
26
P0.1dB (dBm)
1.2
0.8
0.4
26.5 GHz
33 GHz
0
0
4
8
12
16
20
22
18
+25 C
+85 C
-40 C
14
10
24
28
6
0.01
32
0.1
Input IP3 Over Major Attenuation States
50
IP3 (dBm)
50
40
30
40
+25 C
+85 C
-40 C
30
1
FREQUENCY (GHz)
10
100
Input IP3 vs. Temperature
60
0.1
10
(Minimum Attenuation State)
60
20
0.01
1
FREQUENCY (GHz)
ATTENUATION STATE (dB)
IP3 (dBm)
20
Input Power for 0.1 dB Compression
1.6
-0.4
3
16
ATTENUATION STATE (dB)
Step Attenuation vs. Attenuation State
18 - 33 GHz
STEP ATTENUATION (dB)
Attenuators - SMT
100
100
20
0.01
0.1
1
10
100
FREQUENCY (GHz)
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or [email protected]
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
RF Input Power (0.1 to 33.0 GHz)
+25 dBm
Vdd
+5V @ 4.5 mA
Control Voltage (P0 to P4)
Vdd + 0.5V
Vss
-5V @ 5 mA
Vdd
+7 Vdc
Vss
-7 Vdc
Channel Temperature
150 °C
Continuous Pdiss (T = 85 oC)
(derate 6.8 mW/oC above 85 oC)
0.451 W
Thermal Resistance
144 °C/W
Storage Temperature
-65 to + 150 °C
Operating Temperature
-40 to +85 °C
ESD Sensitivity (HBM)
Class 1A
Control Voltage
State
Bias Condition
Low
0 to 0.8V @ 1 µA
High
2 to 5V @ 1 µA
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
Attenuators - SMT
Bias Voltages & Currents
Absolute Maximum Ratings
NOTES:
1. LEADFRAME MATERIAL: COPPER ALLOY
2. DIMENSIONS ARE IN INCHES [MILLIMETERS]
3. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
4. PAD BURR LENGTH SHALL BE 0.15mm MAXIMUM.
PAD BURR HEIGHT SHALL BE 0.05mm MAXIMUM.
5. PACKAGE WARP SHALL NOT EXCEED 0.05mm.
6. ALL GROUND LEADS AND GROUND PADDLE MUST BE
SOLDERED TO PCB RF GROUND.
7. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED
LAND PATTERN.
Package Information
Part Number
Package Body Material
Lead Finish
MSL Rating
HMC939LP4
Low Stress Injection Molded Plastic
Sn/Pb Solder
MSL1
[1]
HMC939LP4E
RoHS-compliant Low Stress Injection Molded Plastic
100% matte Sn
MSL1
[2]
Package Marking [3]
H939
XXXX
H939
XXXX
[1] Max peak reflow temperature of 235 °C
[2] Max peak reflow temperature of 260 °C
[3] 4-Digit lot number XXXX
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or [email protected]
4
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Attenuators - SMT
Truth Table
5
Control Voltage Input
P4
16 dB
P3
8 dB
P2
4 dB
P1
2 dB
P0
1 dB
Attenuation
State
RF1 - RF2
High
High
High
High
High
Reference I.L.
High
High
High
High
Low
1 dB
High
High
High
Low
High
2 dB
4 dB
High
High
Low
High
High
High
Low
High
High
High
8 dB
Low
High
High
High
High
16 dB
Low
Low
Low
Low
Low
31 dB
Any Combination of the above states will provide an attenuation
approximately equal to the sum of the bits selected.
Pin Descriptions
Pad Number
Function
Description
1
Vss
Negative Bias -5V
2-4, 6-13,
15-17, 19
N/C
The pins are not connected internally; however, all data
shown herein was measured with these pins connected to
RF/DC ground externally.
5, 14
RF1, RF2
These pins are DC coupled and matched to 50 Ohm. Blocking
capacitors are required if RF line potential is not equal to 0V.
18
Vdd
Positive Bias +5V
20 - 24
P0 - P4
See truth table and control voltage table.
GND
Package bottom must be connected to RF/DC ground.
Interface Schematic
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or [email protected]
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Attenuators - SMT
Application Circuit
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or [email protected]
6
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Attenuators - SMT
Evaluation PCB
List of Materials for Evaluation PCB 130450 [1]
Item
Description
J1, J2, J4, J5
2.9 mm PC Mount RF Connector
J3
DC Connector
C1, C2
1000 pF Capacitor, 0402 Pkg.
U1
HMC939LP4 Digital Attenuator
PCB [2]
131909 Evaluation Board
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Rogers 4350
7
The circuit board used in the application should use
RF circuit design techniques. Signal lines should
have 50 Ohm impedance while the package ground
leads 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: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or [email protected]
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Attenuators - SMT
Notes:
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343
Fax: 978-250-3373
Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or [email protected]
8