HMC258
v03.1007
GaAs MMIC SUB-HARMONICALLY
PUMPED MIXER, 14 - 21 GHz
Features
Integrated LO Amplifier: 0 dBm Drive
Sub-Harmonically Pumped (x2) LO
High 2LO/RF Isolation: 40 dB
Die Size: 0.85 x 1.15 x 0.1 mm
Typical Applications
The HMC258 is ideal for:
• Microwave Point-to-Point Radios
3
MIXERS - SUB-HARMONIC - CHIP
• VSAT
• SATCOM
Functional Diagram
General Description
The HMC258 chip is a compact sub-harmonically
pumped (x2) single ended MMIC mixer with an
integrated LO amplifier which can be used as an
upconverter or downconverter. The chip utilizes a
GaAs MESFET technology that results in a small
overall chip area of 0.9mm
2
. The 2LO to RF isolation
is excellent eliminating the need for additional fil-
tering. The LO amplifier is a single bias (+5V) two
stage design with only 0 dBm drive requirement. A
less stringent oscillator design is made possible by the
low LO drive and sub-harmonic nature of the chip. All
data is with the chip in a 50 ohm test fixture connected
via 0.025 mm (1 mil) diameter wire bonds of minimal
length <0.31 mm (<12 mils).
Electrical Specifi cations,
T
A
= +25° C, LO Drive = 0 dBm
Parameter
Min.
Frequency Range, RF
Frequency Range, LO
Frequency Range, IF
Conversion Loss
Noise Figure (SSB)
2LO to RF Isolation
2LO to IF Isolation
IP3 (Input)
1 dB Compression (Input)
Supply Current (Idd)
30
30
0
-5
IF = 1 GHz
Vdd = +5.0V
Typ.
14 - 21
7 - 10.5
DC - 3
10
10
40
40 ~ 50
7
0
50
67
13.5
13.5
34
38
0
-4
Max.
Min.
IF = 1 GHz
Vdd = +5.0V
Typ.
17 - 20
8.5 - 10
DC - 3
9.5
9.5
40
40 ~ 50
7
1
50
67
12
12
Max.
GHz
GHz
GHz
dB
dB
dB
dB
dBm
dBm
mA
Units
3-8
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC258
v03.1007
GaAs MMIC SUB-HARMONICALLY
PUMPED MIXER, 14 - 21 GHz
Conversion Gain vs.
Temperature @ LO = 0 dBm
0
Isolation @ LO = 0 dBm
0
-10
ISOLATION (dB)
-20
-30
-40
-50
-60
2 LO/IF
LO/RF
LO/IF
2 LO/RF
RF/IF
CONVERSION GAIN (dB)
-5
-10
3
MIXERS - SUB-HARMONIC - CHIP
3-9
-15
+25 C
-55 C
+85 C
-20
-25
13
14
15
16
17
18
19
20
21
22
23
RF FREQUENCY (GHz)
13
14
15
16
17
18
19
20
21
22
23
RF FREQUENCY (GHz)
Conversion Gain vs. LO Drive
0
+2 dBm
CONVERSION GAIN (dB)
-5
0 dBm
+4 dBm
Return Loss @ LO = 0 dBm
0
-5
RETURN LOSS (dB)
-10
-15
-20
-25
-30
-35
IF
RF
LO
-10
-15
-4 dBm
-20
-2 dBm
-25
13
14
15
16
17
18
19
20
21
22
23
RF FREQUENCY (GHz)
-40
0
2
4
6
8
10
12
14
16
18
20
22
FREQUENCY (GHz)
IF Bandwidth @ LO = 0 dBm
0
IF CONVERSION GAIN (dB)
Upconverter Performance
Conversion Gain vs. LO Drive
0
-4 dBm
-2 dBm
0 dBm
+2 dBm
+4 dBm
-10
CONVERSION GAIN (dB)
0
1
2
3
4
5
6
-5
-5
-10
-15
-15
-20
-20
-25
IF FREQUENCY (GHz)
-25
13
14
15
16
17
18
19
20
21
22
23
RF FREQUENCY (GHz)
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC258
v03.1007
GaAs MMIC SUB-HARMONICALLY
PUMPED MIXER, 14 - 21 GHz
Input IP3 vs. LO Drive
20
15
Input IP3 vs. Temperature @ LO = 0 dBm
20
15
10
5
0
-2 dBm
0 dBm
+2 dBm
-55 C
+25 C
+85 C
IP3 (dBm)
5
0
-5
-10
13
14
15
16
17
18
19
20
21
22
23
RF FREQUENCY (GHz)
MIXERS - SUB-HARMONIC - CHIP
IP3 (dBm)
3
10
-5
-10
13
14
15
16
17
18
19
20
21
22
23
RF FREQUENCY (GHz)
Input IP2 vs. LO Drive
60
55
50
IP2 (dBm)
45
40
35
30
25
20
13
14
15
16
17
18
19
20
21
22
23
RF FREQUENCY (GHz)
+2 dBm
0 dBm
-2 dBm
Input IP2 vs. Temperature @ LO = 0 dBm
60
55
50
IP2 (dBm)
45
40
35
30
25
20
13
14
15
16
17
18
19
20
21
22
23
RF FREQUENCY (GHz)
-55 C
+25 C
+85 C
MxN Spurious Outputs
@ LO Drive = 0 dBm
nLO
mRF
-3
±5
±4
±3
±2
±1
0
P1dB vs. Temperature @ LO = 0 dBm
6
+25 C
-55 C
+85 C
4
P1dB (dBm)
-2
-1
0
1
2
3
-44
-57
-18
-52
-9
-26
X
-52
-56
-30
+20
-46
-49
-2
2
0
-2
RF = 18 GHz @ -10 dBm
LO = 8.5 GHz @ 0 dBm
All values in dBc below the IF power level
-4
13
14
15
16
17
18
19
20
21
22
23
RF FREQUENCY (GHz)
3 - 10
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC258
v03.1007
GaAs MMIC SUB-HARMONICALLY
PUMPED MIXER, 14 - 21 GHz
Absolute Maximum Ratings
RF / IF Input (Vdd = +5V)
LO Drive (Vdd = +5V)
Vdd
Storage Temperature
Operating Temperature
+13 dBm
+13 dBm
+10 Vdc
-65 to +150 °C
-55 to +85 °C
NOTE: A 100pF single layer chip bypass capacitor is
recommended on the Vdd port no further than 0.762 mm
(30 mils) from the HMC258
3
MIXERS - SUB-HARMONIC - CHIP
3 - 11
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Pad Descriptions
Pad Number
Function
Description
Interface Schematic
1
Vdd
Power supply for the LO Amplifier. An external RF bypass
capacitor of 100 - 330 pF is required. A MIM border capacitor
is recommended. The bond length to the capacitor should be
as short as possible. The ground side of the capacitor should
be connected to the housing ground.
2
IF
This pad is DC coupled and should be DC blocked
externally using a series capacitor whose value has been
chosen to pass the necessary IF frequency range. Any applied
DC voltage to this pin will result in die non-function and pos-
sible die failure.
This pad is AC coupled
and matched to 50 Ohm.
This pad is AC coupled
and matched to 50 Ohm.
3
RF
4
LO
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
HMC258
v03.1007
GaAs MMIC SUB-HARMONICALLY
PUMPED MIXER, 14 - 21 GHz
Outline Drawing
3
MIXERS - SUB-HARMONIC - CHIP
Die Packaging Information
Standard
WP-8 (Waffle Pack)
[1]
NOTES:
1. ALL DIMENSIONS ARE IN INCHES [MM].
2. BOND PADS ARE .004” SQUARE.
3. TYPICAL BOND PAD SPACING CENTER TO CENTER IS .006”.
4. BACKSIDE METALLIZATION: GOLD.
5. BOND PAD METALLIZATION: GOLD.
6. BACKSIDE METAL IS GROUND.
7. CONNECTION NOT REQUIRED FOR UNLABELED BOND PADS.
Alternate
[2]
[1] Refer to the “Packaging Information” section for die
packaging dimensions.
[2] For alternate packaging information contact Hittite
Microwave Corporation.
3 - 12
For price, delivery, and to place orders, please contact Hittite Microwave Corporation:
20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373
Order On-line at www.hittite.com
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