HMC385LP4 / 385LP4E
v02.0705
MMIC VCO w/ BUFFER
AMPLIFIER, 2.25 - 2.5 GHz
Typical Applications
Features
Low noise MMIC VCO w/Buffer Amplifier for:
• Wireless Infrastructure
• Industrial Controls
Pout: +4.5 dBm
Phase Noise: -115 dBc/Hz @100 KHz
No External Resonator Needed
Single Supply: 3V @ 35 mA
QFN Leadless SMT Package, 16 mm2
• Test Equipment
• Military
Functional Diagram
General Description
The HMC385LP4 & HMC385LP4E are GaAs InGaP
Heterojunction Bipolar Transistor (HBT) MMIC VCOs
with integrated resonators, negative resistance
devices, varactor diodes, and buffer amplifiers.
Covering 2.25 to 2.5 GHz, the VCO’s phase noise
performance is excellent over temperature, shock,
vibration and process due to the oscillator’s monolithic
structure. Power output is 4.5 dBm typical from a
single supply of 3V @ 35mA. The voltage controlled
oscillator is packaged in a low cost leadless QFN
4x4 mm surface mount package.
11
Electrical Specifications, TA = +25° C, Vcc = +3V
Parameter
Frequency Range
Min.
1.5
0
Typ.
2.25 - 2.5
4.5
Max.
Units
GHz
dBm
dBc/Hz
V
Power Output
SSB Phase Noise @ 100 kHz Offset, Vtune= +5V @ RF Output
Tune Voltage (Vtune)
-115
10
10
Supply Current (Icc) (Vcc = +3.0V)
Tune Port Leakage Current
35
9
mA
μA
Output Return Loss
dB
Harmonics
2nd
3rd
-7
-23
dBc
dBc
Pulling (into a 2.0:1 VSWR)
Pushing @ Vtune= +5V
Frequency Drift Rate
2.0
-2
MHz pp
MHz/V
MHz/°C
0.25
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11 - 14
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