HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Typical Applications
the HMC939LP4 / HMC939LP4e is ideal for:
• Fiber Optics & Broadband Telecom
• Microwave Radio & VSAT
• Military Radios, Radar & ECM
• Space Applications
• Sensors
• Test & Measurement Equipment
Features
1.0 dB LSB Steps to 31 dB
Single Positive Control Line Per Bit
±1.0 dB Typical Bit Error
High Input IP3: +43 dBm
16mm
2
Leadless SMT Plastic Package
AttenuAtors - sMt
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 attenu-
ator bit values are 1.0 (LSB), 2, 4, 8, 16 for a total atten-
uation 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,
T
A
= +25° C, With Vdd = +5V, Vss = -5V, P0 - P4 = 0/ +5V
Parameter
Insertion Loss
Attenuation Range
Return Loss (RF1 & RF2, All Atten. States)
Attenuation Accuracy: (Referenced to Insertion Loss)
1.0 - 15 dB States
16 - 31 dB States
16 - 31 dB States
Frequency (GHz)
0.1 - 18.0 GHz
18.0 - 26.5 GHz
26.5 - 33.0 GHz
0.1 - 33.0 GHz
0.1 - 33.0 GHz
0.1 - 33.0 GHz
0.1 - 20.0 GHz
20.0 - 33.0 GHz
0.1 - 0.5 GHz
0.5 - 33.0 GHz
0.1 - 0.5 GHz
0.5 - 33.0 GHz
0.1 - 33.0 GHz
tRISE, tFALL (10/90% RF)
tON/tOFF (50% CTL to 10/90% RF)
Idd
Iss
0.1 - 33.0 GHz
0.1 - 33.0 GHz
2.5
-7.0
60
90
4.5
-5.0
6.5
-3.0
ns
ns
mA
mA
Min.
Typ.
4.0
5.5
6.5
31
12
± (0.5 + 5%) of Atten. Setting Max
± (0.5 + 5%) of Atten. Setting Max
± (0.6 + 8%) of Atten. Setting Max
20
25
40
43
Max.
5.5
7.0
8.5
Units
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dBm
dBm
Input Power for 0.1 dB Compression
Input Third Order Intercept Point
(Two-Tone Input Power= 0 dBm Each Tone)
Switching Characteristics
1
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 apps@hittite.com
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Insertion Loss vs. Temperature
0
NORMALIZED ATTENUATION (dB)
-2
INSERTION LOSS (dB)
-4
-6
-8
-10
-12
0
5
10
15
20
25
30
35
40
FREQUENCY (GHz)
Normalized Attenuation
0
-5
-10
-15
-20
-25
-30
-35
-40
0
5
10
15
20
(Only Major States are Shown)
+25 C
+85 C
-40 C
25
30
35
40
FREQUENCY (GHz)
Input Return Loss
0
(Only Major States are Shown)
Output Return Loss
0
(Only Major States are Shown)
-10
RETURN LOSS (dB)
RETURN LOSS (dB)
-10
-20
-20
-30
-30
-40
-40
-50
0
5
10
15
20
25
30
35
40
FREQUENCY (GHz)
-50
0
5
10
15
20
25
30
35
40
FREQUENCY (GHz)
Bit Error vs. Attenuation State
2.4
2
1.6
BIT ERROR (dB)
1.2
0.8
0.4
0
-0.4
-0.8
0
4
8
12
16
20
24
28
ATTENUATION STATE (dB)
5 GHz
10 GHz
18 GHz
26.5 GHz
33 GHz
Bit Error vs. Frequency
3
2
BIT ERROR (dB)
1
0
-1
-2
-3
(Only Major States are Shown)
31 dB
0
5
10
15
20
25
30
35
40
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 apps@hittite.com
AttenuAtors - sMt
2
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Relative Phase vs. Frequency
(Only Major States are Shown)
120
100
Step Attenuation vs. Attenuation State
0.1 - 18 GHz
1.6
AttenuAtors - sMt
STEP ATTENUATION (dB)
RELATIVE PHASE (deg)
80
31 dB
1.2
60
40
20
0
-20
0.8
5 GHz
10 GHz
18 GHz
0.4
0
5
10
15
20
25
30
35
40
0
0
4
8
12
16
20
24
28
32
ATTENUATION STATE (dB)
FREQUENCY (GHz)
Step Attenuation vs. Attenuation State
18 - 33 GHz
1.6
STEP ATTENUATION (dB)
1.2
Input Power for 0.1 dB Compression
30
26
P0.1dB (dBm)
22
18
14
10
6
0.01
+25 C
+85 C
-40 C
0.8
0.4
26.5 GHz
33 GHz
0
-0.4
0
4
8
12
16
20
24
28
32
ATTENUATION STATE (dB)
0.1
1
FREQUENCY (GHz)
10
100
Input IP3 Over Major Attenuation States
60
Input IP3 vs. Temperature
(Minimum Attenuation State)
60
50
IP3 (dBm)
IP3 (dBm)
50
40
40
30
30
+25 C
+85 C
-40 C
20
0.01
0.1
1
FREQUENCY (GHz)
10
100
20
0.01
0.1
1
FREQUENCY (GHz)
10
100
3
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 apps@hittite.com
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Absolute Maximum Ratings
RF Input Power (0.1 to 33.0 GHz)
Control Voltage (P0 to P4)
Vdd
Vss
Channel Temperature
Continuous Pdiss (T = 85 C)
(derate 6.8 mW/
o
C above 85
o
C)
o
Bias Voltages & Currents
Vdd
Vss
+5V @ 4.5 mA
-5V @ 5 mA
+25 dBm
Vdd + 0.5V
+7 Vdc
-7 Vdc
150 °C
0.451 W
144 °C/W
-65 to + 150
°C
-40 to +85
°C
Class 1A
Control Voltage
State
Low
High
Bias Condition
0 to 0.8V @ 1 µA
2 to 5V @ 1 µA
Thermal Resistance
Storage Temperature
Operating Temperature
ESD Sensitivity (HBM)
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Outline Drawing
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
HMC939LP4
HMC939LP4e
Package Body Material
Low Stress Injection Molded Plastic
RoHS-compliant Low Stress Injection Molded Plastic
Lead Finish
Sn/Pb Solder
100% matte Sn
MSL Rating
MsL1
MsL1
[1]
Package Marking
[3]
H939
XXXX
H939
XXXX
[2]
[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 apps@hittite.com
AttenuAtors - sMt
4
HMC939LP4 / 939LP4E
v01.1211
1.0 dB LSB GaAs MMIC 5-BIT DIGITAL
ATTENUATOR, 0.1 - 33 GHz
Truth Table
AttenuAtors - sMt
Control Voltage Input
P4
16 dB
High
High
High
High
High
Low
Low
P3
8 dB
High
High
High
High
Low
High
Low
P2
4 dB
High
High
High
Low
High
High
Low
P1
2 dB
High
High
Low
High
High
High
Low
P0
1 dB
High
Low
High
High
High
High
Low
Attenuation
State
RF1 - RF2
Reference I.L.
1 dB
2 dB
4 dB
8 dB
16 dB
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
Interface Schematic
1
Vss
Negative Bias -5V
2-4, 6-13,
15-17, 19
5, 14
n/C
The pins are not connected internally; however, all data
shown herein was measured with these pins connected to
RF/DC ground externally.
These pins are DC coupled and matched to 50 Ohm. Blocking
capacitors are required if RF line potential is not equal to 0V.
RF1, RF2
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.
5
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 apps@hittite.com
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