Datasheet HMC285 Datasheet (Hittite)

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

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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: [phone] Fax: [phone] Web Site: www.hittite.com

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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: [phone] Fax: [phone] 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

MICROWAVE CORPORATION

HMC285 SMT SINGLE-BALANCED MIXER 1.7 - 3.5 GHz

HMC285

4

MIXERS

SMT

FEBRUARY 2001

Input IP3 vs. LO Drive

25
24
23
22
21
20
19
18

INPUT IP3 (dBm)

17
16
15

1 1.25 1.5 1.75 2 2.25 2.5 2.75 3

+13 dBm

+10 dBm

+7 dBm

FREQUENCY (GHz)

Input IP2 vs. LO Drive

70

60

50

40

INPUT IP2 (dBm)

30

20

1 1.25 1.5 1.75 2 2.25 2.5 2.75 3

+10 dBm

+13 dBm

+7 dBm

FREQUENCY (GHz)

Input IP3 vs. Temperature
@ LO = +10 dBm

25
24
23
22
21
20
19
18

INPUT IP3 (dBm)

17
16
15

1 1.25 1.5 1.75 2 2.25 2.5 2.75 3

-40 C
+25 C

+85 C

FREQUENCY (GHz)

P1dB vs. Temperature
@ LO = +10 dBm

15
14
13
12
11
10

9
8

INPUT P1dB (dBm)

7
6
5

1 1.3 1.5 1.8 2 2.2 2.5 2.7 3

-40 C

+25 C

+85 C

FREQUENCY (GHz)

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MXN Spurious Outputs

nLO

mRF 0 1 2 3 4

0xx-12.41133

1 10 0 38 23 43
25960614362
3 >110 87 90 80 88
4 >110 > 110 >110 >110 >110

RF= 2.6 GHz @ -10dBm
LO= 2.2 GHz @ +10 dBm
All values in dBc relative to the IF

Harmonics of LO

nLO Spur at RF Port

LO Frequency (GHz)

1.5 42 17 47 47

1.7 39164144

1.9 39 15 37 44

2.1 47 16 35 45

2.3 36 18 32 48

2.5 30 21 32 50

LO= +10 dBm
Values in dBc below input LO level measured at the RF port

1 2 3 4

12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone] Web Site: www.hittite.com

4 - 166

MICROWAVE CORPORATION

HMC285 SMT SINGLE-BALANCED MIXER 1.7 - 3.5 GHz

HMC285

V00.0700

Schematic

LO

(PIN 5)

Outline Drawing

IF (PIN 3)

RF
(PIN 1)

GND
(PINS 2, 4, 6)

FEBRUARY 2001

Absolute Maximum Ratings

RF/ IF Inpu t +13 dBm
LO Drive +27 dBm

Storage Temperature -65 to +150 deg C
Operating Temperature -55 to +85 deg C

4

MIXERS

1. MATERIAL:
A) PACKAGE BODY - LOW STRESS INJECTION-MOLDED PLASTIC,
SILICA & SILICONE IMPREGNATED.
B) LEADFRAME MATERIAL: COPPER ALLOY

2 . PLATING: LEAD-TIN SOLDER PLATE
3 . DIMENSIONS ARE IN INCHES (MILLIMETERS),

UNLESS OTHERWISE SPECIFIED TOL. ARE ±0.005 (±0.13)

4. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.006 (0.15mm) PER SIDE

5. DIMENSION DOES NOT INCLUDE MOLDFLASH OF 0.010 (0.25mm) PER SIDE

12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone] Web Site: www.hittite.com

4 - 167

SMT

MICROWAVE CORPORATION

HMC285 SMT SINGLE-BALANCED MIXER 1.7 - 3.5 GHz

HMC285

4

MIXERS

FEBRUARY 2001

The circuit board used in the final application should use RF circuit design techniques. Signal lines should have
50 ohm impedance while the package ground leads should be connected directly to the ground plane. A sufficient
number of VIA holes should be used to connect the top and bottom ground planes. The evaluation circuit board
is available from Hittite upon request.

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Evaluation Circuit Board Layout Design Details

Layout Technique Grounded Co-Planar Waveguide (GCPW)
Material Rogers 4350
Dielectric Thickness 0.020" (0.51 mm)
50 Ohm Line Width 0.031" (0.79 mm)
Gap to Ground Edge 0.010" (0.25 mm)
Ground VIA Hole Diameter 0.014" (0.36 mm)

Connectors SMA-F ( EF - Johnson P/N 142-0701-806)

SMT

12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone] Web Site: www.hittite.com

4 - 168

MICROWAVE CORPORATION

HMC285 SMT SINGLE-BALANCED MIXER 1.7 - 3.5 GHz

HMC285

V00.0700

Eval Board Layout

J1

J2

U1

J3

FEBRUARY 2001

4

MIXERS

The circuit board used in the final application should be generated with proper RF circuit design techniques.
Signal lines at RF IN and RF OUT should have 50 ohm impedance and the package ground leads and exposed
ground paddle should be connected directly to the ground plane similar to that shown above. The evaluation
circuit board shown above is available from Hittite Microwave Corporation upon request.

List of Material

J1, J2, J3 PC Mount SMA Connector
U1 HMC285 Mixer
PCB 103065 Eval Board
* Circuite Board Material: 4350

12 Elizabeth Drive, Chelmsford, MA 01824 Phone: [phone] Fax: [phone] Web Site: www.hittite.com

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SMT