ALPHA AM028D1-00 Datasheet
Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com 1
Specifications subject to change without notice. 2/00A
26–33 GHz GaAs MMIC
Double Balanced Down Converter Mixer
Features
■ Low Conversion Loss, 6.5 dB
■ Insensitive to LO Power Variations
■ High LO to RF Isolation, 27 dB
■ No DC Bias Required
Description
Alpha’s double balanced GaAs Schottky diode mixer has
a typical conversion loss of 6.5 dB at an LO power level
as low as 11 dBm over the band 26–33 GHz. The chip
uses Alpha’s proven Schottky diode technology, and is
based upon MBE layers for the highest uniformity and
repeatability. The diodes employ surface passivation to
ensure a rugged, reliable part with through-substrate via
holes and gold-based backside metallization to facilitate
an epoxy die attach process. All chips are screened for
DC diode parameters and lot samples are RF measured
to guarantee performance.
Dimensions indicated in mm.
All pads are ≥ 0.07 mm wide.
Chip thickness = 0.1 mm.
Chip Outline
Parameter Symbol Min. Typ.
2
Max. Unit
RF and LO Frequency Range FRF, F
LO
26–33 GHz
IF Frequency Range F
IF
0–2 GHz
LO Power Level P
LO
11–21 dBm
Conversion Loss
1
L
C
6.5 dB
RF and LO Return Loss
1
RLRF, RL
LO
20 dB
LO to RF Isolation
1
ISO
LO-RF
27 dB
LO to IF Isolation
1
ISO
LO-IF
30 dB
RF Input 1 dB Compression Point
1
P
1 dB
12 dBm
Two Parallel Diode Series Resistance 1.5 Ω
Electrical Specifications at 25°C
50 OHMS50 OHMS
50 OHMS50 OHMS
OHMIC ADDED 9-4-92OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92OHMIC ADDED 9-4-92
0.000
0.000
1.582
2.155
2.320
1.166
0.085
0.085
0.591
1.086
Absolute Maximum Ratings
Characteristic Value
Operating Temperature -55°C to +125°C
Storage Temperature -65°C to +150°C
Total Input Power (RF + LO) 23 dBm
AM028D1-00
1. Not measured on a 100% basis.
2. Typical represents the median parameter value across the specified
frequency range for the median chip.
26–33 GHz GaAs MMIC Double Balanced Down Converter Mixer AM028D1-00
2 Alpha Industries, Inc. [781] 935-5150 • Fax [617] 824-4579 • Email sales@alphaind.com • www.alphaind.com
Specifications subject to change without notice. 2/00A
Performance vs. LO Power
F
RF
= 28 GHz, FLO = 27 GHz, PRF = -10 dBm
LO Power (dBm)
Conversion Loss (dB)
0
10
20
30
40
50
Return Loss & Isolation (dB)
4
6
8
10
12
14
7 9 11 13 15 17 19
Conversion Loss
LO Return Loss
LO to RF Isolation
LO to IF Isolation
01234 1089765
Performance vs. IF Frequency
F
RF
= 28 GHz, FLO = FRF + FIF, PLO = 12 dBm
4
6
8
10
12
14
IF Frequency (GHz)
Conversion Loss (dB)
50 OHMS50 OHMS
50 OHMS50 OHMS
OHMIC ADDED 9-4-92OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92OHMIC ADDED 9-4-92
RF
IF
LO
50 OHMS50 OHMS
50 OHMS50 OHMS
OHMIC ADDED 9-4-92OHMIC ADDED 9-4-92
OHMIC ADDED 9-4-92OHMIC ADDED 9-4-92
RF
IF
LO
90˚ Phase Shifter/Splitter
LO
IF
RF
6
4
8
10
12
14
25 26 27 28 29 30 31 32 33 34
Performance vs. LO Frequency
F
RF
= FLO + 1 GHz, PLO = 12 dBm
LO Frequency (GHz)
Conversion Loss (dB)
0
10
20
30
40
50
Return Loss & Isolation (dB)
Conversion Loss
LO Return Loss
LO to RF Isolation
LO to IF Isolation
Typical Performance Data
Wire Bonding Configurations
Circuit Schematic
Single IF bond configuration.
Requires two IF bonds.
LO to IF isolation is degraded by 7 dB for this configuration.
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