HMC881LP5E
v01.0110
FILTER - TUNABLE, LOW PASS SMT
2.2 - 4.0 GHz
3
FILTERS - TUNABLE - SMT
Typical Applications
The HMC881LP5E is ideal for:
• Test & Measurement Equipment
• Military, RADAR & EW
• SATCOM & Space
• R&D Laboratories
Features
Fast Tuning Response
Excellent Wideband Rejection
Single Positive Frequency Control: 0 to +14V
Low Insertion Loss &
User Selectable Cutoff Frequency
Single Chip Replacement
for Mechanically Tuned Designs
32 Lead 5x5 mm SMT Package: 25 mm
2
Functional Diagram
General Description
The HMC881LP5E is a MMIC low pass filter which
features a user selectable cutoff frequency. The
cutoff frequency can be varied from 2.2 to 4.0 GHz
by applying a single analog tuning voltage between
0 and 14V. This low pass filter provides a low 3.8 dB
insertion loss, 10 dB return loss and 1.25 x ƒcutoff
stopband attenuation of >20 dB. This tunable filter
can be used as a much smaller alternative to physi-
cally large switched filter banks and cavity tuned fil-
ters. The HMC881LP5E has excellent microphonics
due to the monolithic design, and provides a dynami-
cally adjustable solution in advanced communications
applications. The low pass tunable filter is packaged
in a RoHS compliant 5x5mm QFN leadless package.
Electrical Specifi cations,
T
A
= +25°C
Parameter
Passband
ƒcutoff
[1]
Tuning Range
Stopband Frequency (Rejection >20 dB)
Re-entry Frequency (Rejection <30 dB)
Insertion Loss
Return Loss
Maximum Input Power for Linear Operation
Frequency Control Voltage (Vfctl)
Frequency Control Port Source/Sink Current (I
fctl
)
Residual Phase Noise
[2]
(1 MHz offset)
ƒcutoff Drift Rate (Fixed Vfctl)
Tuning Characteristics
[3]
tFULLBAND (0% Vfctl to 90% RF)
-165
-0.8
150
0
Min.
0
2.2
1.25 x ƒcutoff
30
3.8
10
10
14
±1
Typ.
Max.
4
4
Units
GHz
GHz
GHz
GHz
dB
dB
dBm
V
mA
dBc/Hz
MHz/°C
ns
[1] ƒcutoff defined as the point at which the insertion loss is 3 dB below the minimum passband insertion loss.
[2] Optimum residual phase noise performance requires the use of a low noise driver circuit.
[3]Tuning speed is dependent on driver circuit. Data measured with a high speed op-amp driver and includes driver slew rate delay.
3-2
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, 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
HMC881LP5E
v01.0110
FILTER - TUNABLE, LOW PASS SMT
2.2 - 4.0 GHz
Broadband Insertion Loss
vs. Control Voltage
0
-10
Broadband
Return Loss vs. Control Voltage
0
0V
3
FILTERS - TUNABLE - SMT
INSERTION LOSS (dB)
0V
RETURN LOSS (dB)
-10
-20
-30
7V
14V
7V
14V
-20
-40
-50
-60
-70
0
5
10
15
20
25
30
S11
S22
-30
-40
0
5
10
15
20
25
30
FREQUENCY (GHz)
FREQUENCY (GHz)
Insertion Loss vs. Control Voltage
[1]
0
Return Loss vs. Control Voltage
[1]
0
0V
INSERTION LOSS (dB)
7V
14V
0V
-6
7V
RETURN LOSS (dB)
-3
-10
14V
-20
-9
-30
S11
S22
-12
0
1
2
3
4
5
-40
0
1
2
3
4
5
FREQUENCY (GHz)
FREQUENCY (GHz)
Insertion Loss vs. Temperature, Vfctl @ 7V
[1]
0
Return Loss vs. Temperature, Vfctl @ 7V
[1]
0
+25C
+85C
-40C
S11
-20
INSERTION LOSS (dB)
-6
-9
+25C
+85C
-40C
RETURN LOSS (dB)
-3
-10
-30
S22
-40
-12
0
1
2
3
4
5
0
1
2
3
4
5
FREQUENCY (GHz)
FREQUENCY (GHz)
[1] Low frequency performance limited by external DC blocking capacitors at RF input and output.
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, 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
3-3
HMC881LP5E
v01.0110
FILTER - TUNABLE, LOW PASS SMT
2.2 - 4.0 GHz
3
FILTERS - TUNABLE - SMT
Cutoff Frequency vs. Temperature
5
Average Insertion Loss vs.
Temperature in a 2 dB Bandwidth
0
+25C
+85C
-40C
3
INSERTION LOSS(dB)
4
-1
FREQUENCY(GHz)
-2
2
+25C
+85C
-40C
-3
1
-4
0
0
2
4
6
8
10
12
14
-5
0
2
4
6
8
10
12
14
Vftcl(V)
Vfctl(V)
Rejection Ratio vs. Temperature
1.5
+25C
+85C
-40C
[1]
Maximum Return Loss in a 2 dB
Bandwidth vs. Temperature
0
+25C
+85C
-40C
F20dB TO F3dB RATIO
1.4
-4
1.3
RETURN LOSS (dB)
10
12
14
-8
1.2
-12
1.1
-16
1
0
2
4
6
8
-20
0
2
4
6
8
10
12
14
Vfctl (V)
Vfctl(V)
Tuning Sensitivity vs. Temperature
300
Group Delay
1.4
1.2
TUNING SENSITIVITY (MHz/V)
250
GROUP DELAY (nsec)
0V
1
0.8
200
150
+25C
+85C
-40C
7V
0.6
0.4
0.2
0
14V
100
50
0
0
2
4
6
8
10
12
14
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
Vfctl(V)
FREQUENCY (GHz)
[1] Rejection ratio is defined as the ratio of the frequency at which the relative insertion loss is 20 dB, to ƒcutoff
3-4
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, 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
HMC881LP5E
v01.0110
FILTER - TUNABLE, LOW PASS SMT
2.2 - 4.0 GHz
Absolute Maximum Ratings
Frequency Control Voltage (Vfctl)
RF Power Input
Storage Temperature
ESD Rating (HBM)
-0.5 to +15V
26.5 dBm
-65 to +150 °C
Class 1B
Reliability Information
Junction Temperature to Maintain
1 Million Hour MTTF
Nominal Junction Temperature
(T= 85 °C and Pin = 10 dBm)
Operating Temperature
150 °C
90 °C
-40 to +85 °C
3
FILTERS - TUNABLE - SMT
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. Pin BURR LENGTH SHALL BE 0.15mm MAXIMUM.
Pin 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
HMC881LP5E
Package Body Material
RoHS-compliant Low Stress Injection Molded Plastic
Lead Finish
100% matte Sn
MSL Rating
MSL1
[2]
Package Marking
[1]
H881
XXXX
[1] 4-Digit lot number XXXX
[2] Max peak reflow temperature of 260 °C
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, 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
3-5
HMC881LP5E
v01.0110
FILTER - TUNABLE, LOW PASS SMT
2.2 - 4.0 GHz
3
FILTERS - TUNABLE - SMT
Pin Descriptions
Pin Number
1 - 4, 7 - 13,
15 - 18, 21 - 32
Function
N/C
Description
The pins are not connected internally; however, all data
shown herein was measured with these pins connected to
RF/DC ground externally.
These pins and exposed paddle
must be connected to RF/DC ground.
Interface Schematic
5, 20
GND
6
RFIN
This pin is DC coupled and matched to 50 Ohms.
External voltage must not be applied to this pin.
14
Vfctl
Cutoff frequency control voltage.
19
RFOUT
This pin is DC coupled and matched to 50 Ohms.
External voltage must not be applied to this pin.
Application Circuit
3-6
For price, delivery and to place orders: Hittite Microwave Corporation, 20 Alpha Road, 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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