HMC881LP5E
v01.0110
FILTER - TUNABLE, LOW PASS SMT
2.2 - 4.0 GHz
3
Typical Applications
The HMC881LP5E is ideal for:
• Test & Measurement Equipment
• Military, RADAR & EW
• SATCOM & Space
Features
Fast Tuning Response
Excellent Wideband Rejection
Single Positive Frequency Control: 0 to +14V
Low Insertion Loss &
User Selectable Cutoff Frequency
• R&D Laboratories
Single Chip Replacement
for Mechanically Tuned Designs
32 Lead 5x5 mm SMT Package: 25 mm2
General Description
Functional Diagram
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 Specifications, TA = +25°C
Parameter
Min.
0
Typ.
Max.
Units
GHz
GHz
GHz
GHz
dB
Passband
4
4
[1]
ƒcutoff Tuning Range
2.2
Stopband Frequency (Rejection >20 dB)
Re-entry Frequency (Rejection <30 dB)
Insertion Loss
1.25 x ƒcutoff
30
3.8
10
Return Loss
dB
Maximum Input Power for Linear Operation
Frequency Control Voltage (Vfctl)
10
14
1
dBm
V
0
Frequency Control Port Source/Sink Current (Ifctl
)
mA
Residual Phase Noise [2] (1 MHz offset)
ƒcutoff Drift Rate (Fixed Vfctl)
-165
-0.8
dBc/Hz
MHz/°C
Tuning Characteristics [3]
tFULLBAND (0% Vfctl to 90% RF)
150
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.
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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