Hittite HMC285 Datasheet
MICROWAVE CORPORATION
GaAs MMIC SMT SINGLE BALANCED MIXER 1.7 - 3.5 GHz
HMC285
4
MIXERS
FEBRUARY 2001
Features
NO EXTERNAL COMPONENTS REQUIRED
LO/RF ISOLATION: 32 dB
INPUT IP3: +20 dBm
IDEAL FOR MMDS & W-CDMA
V00.0700
General Description
The HMC285 is an ultra miniature single balanced mixer in a 6 lead plastic surface mount
SOT26 package. This passive MMIC mixer is
constructed of GaAs Schottky diodes and a
novel planar transformer balun on the chip. The
RF port is balanced via the MMIC balun while the
LO port is connected directly to the diodes. The
device can be used as an up or downconverter
for PCS, W-CDMA, 2.4 ISM, or MMDS applications. The consistent MMIC performance will
improve system operation without the need for
external components. The SOT26 package is
the smallest footprint available for a complete
single-balanced mixer, 0.118” x 0.118” (3.0mm
x 3.0mm).
Guaranteed Perf ormance, As a Function of IF Frequency, -40 to +85 deg C
SMT
Parameter
Frequency Range, RF & LO 2 - 3.5 1.7 - 2.8 GHz
Frequency Range, IF DC - 900 DC - 900 MHz
Conversion Loss 9 11 9.5 11.5 dB
Noise F igure (SSB) 9 11 9.5 11.5 dB
LO to RF Isolation 20 30 25 35 dB
LO to IF Isolation 11 20 14 20 dB
IP3 (Input) 17 21 16 20 dBm
1 dB Gain Compression (Input) 7 11 6 10 dBm
Local Oscillator Drive Level (Typical) 7 to 15 7 to 15 dBm
Note: The IF frequency may be used from 400 - 800 MHz if the RF/LO frequency range is 1.5 - 2.7 GHz with an LO
drive = +10dBm. Increasing the LO drive increases the bandwidth for all frequency schemes.
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Web Site: www.hittite.com
4 - 164
LO = +10 dBm
IF = 100 MHz
Min. Typ. Max. Min. Typ. Max.
LO = +10 dBm
IF = 400 MHz
Units
MICROWAVE CORPORATION
HMC285 SMT SINGLE-BALANCED MIXER 1.7 - 3.5 GHz
HMC285
V00.0700
Conversion Gain vs.
Temperature @ LO = +10 dBm
0
-5
-10
-15
+25 C
-20
CONVERSION GAIN (dB)
-25
-30
1 1.5 2 2.5 3 3.5 4
FREQUENCY (GHz)
-40 C
+85 C
IF = 400 MHz
Conversion Gain vs. LO Drive
0
-5
+13 dBm
-10
-15
-20
CONVERSION GAIN (dB)
-25
-30
1 1.5 2 2.5 3 3.5 4
+7 dBm
+10 dBm
+5 dBm
FREQUENCY (GHz)
IF = 400 MHz
FEBRUARY 2001
Isolation @ LO = +10 dBm
0
-10
-20
-30
-40
ISOLATION (dB)
-50
-60
1 1.5 2 2.5 3 3.5 4
LO/IF
FREQUENCY (GHz)
RF/IF
LO/RF
IF = 400 MHz
Return Loss @ LO = +10 dBm
0
-5
-10
-15
RETURN LOSS (dB)
-20
-25
1 1.5 2 2.5 3 3.5 4
RF
FREQUENCY (GHz)
IF = 400 MHz
LO
4
MIXERS
SMT
IF Bandwidth @ LO = +10 dBm,
Conversion Gain vs. IF Frequency
0
IF = 800 MHz
-5
-10
-15
-20
CONVERSION GAIN (dB)
-25
-30
1 1.5 2 2.5 3 3.5 4
12 Elizabeth Drive, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373 Web Site: www.hittite.com
IF = 400 MHz
IF = 100 MHz
FREQUENCY (GHz)
Conversion Gain & Return Loss
0
IF Conv. Gain
-5
-10
-15
-20
-25
CONVERSION GAIN & RETURN LOSS (dB)
0 0.5 1 1.5
IF Return Loss
FREQUENCY (GHz)
4 - 165
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