Document Outline
- List of Figures
- 1. Available Conversion Gain vs. Frequency and Temperature
- 2. Noise Figure vs. Frequency and Temperature
- 3. OutputPower vs. Frequency and Temperature
- 4. Available Conversion Gain vs. Frequency and Voltage
- 5. Noise Figure Frequency and Supply Voltage
- 6. Output Power vs. Frequency and Voltage
- 7. RF, LO, and IF Return Loss vs. Frequency
- 8. Device Current vs. Supply Voltage and Temperature
- 9. SSB Noise Figure vs. Frequency and Supply Voltage
- 10. SSB Noise Figure vs. Frequency and Temperature
- 11. Conversion Gain vs. Frequency and Supply Voltage
- 12. Conversion Gain vs. Frequency and Temperature
- 13. Available Conversion Gain and Noise Figure vs. LO Drive Power
- 14. One dB Compression and Input Third Order Intercept vs. LO Drive Power
- 15. Isolation (LO-RF, RF-IF, LO-IF) vs. Frequency with no RF and IF Matching Networks
- 16. Isolation (RF-LO, RF-IF, LO-IF) vs. Frequency with RF and IF Matching Networks
- 17.CascodeFETMixer
- 18. Test Circuit.
- 19. Normal Distribution.
- 20. Phase Reference Planes
- 21. RF Layout.
- 22. Image and IF Filters.
- 23. RF Input HPF Matching.
- 24. IF Output LPF Matching.
- 25. Bias Connection.
- 26. Available Conversion Gain and SSB Noise Figure vs. Device Current (Source Resistor).
- 27. One dB Compression and Input Third Order Intercept Point vs. Device Current (Resistor)
- 28. PCB Layout
- 29. Schematic of Example Application Circuit
- 30. RF Input Impedance Match
- 31. IF Input Impedance Match
- 32. Complete 1.9 GHz Mixer
- 33. 800-900 MHz Cellular and ISM Band Mixer.
- 34. 2.4 GHz ISM Band Mixer.
- 35. PCB Pad Layout (dimensions in inches)
- 36. Surface Mount Assembly Profile.
- List of Tables
- 1. Component Values for 1.9 GHz Downconverter.
- Features
- Applications
- Simplified Schematic
- Surface Mount Package SOT-363 (SC-70)
- Pin Connections and Package Marking
- Description
- IAM-91563 Absolute Maximum Ratings
- IAM-91563 Electrical Specifications, TC = 25C, Vd = 3V
- IAM-91563 Typical Performance
- IAM-91563 Typical Performance
- IAM-91563 Typical Reflection Coefficients
- IAM-91563 Applications Information
- Phase Reference Planes
- RF Layout
- PCB Material
- Application Guidelines
- RF Port
- IF port
- LO Port
- 1.9 GHz Design Example
- Designs for Other Frequencies
- SOT-363 PCB Footprint
- SMT Assembly
- Electrostatic Sensitivity
- Package Dimensions
- Part Number Ordering Information
7-135
0.8 6 GHz 3 V Downconverter
Technical Data
Features
+0 dBm Input IP
3
at 1.9 GHz
Single +3V Supply
8.5 dB SSB Noise Figure at
1.9 GHz
9.0 dB Conversion Gain at
1.9 GHz
Ultra-miniature Package
Applications
Downconverter for PCS,
PHS, ISM, WLL, and other
Wireless Applications
IAM-91563
Description
Hewlett-Packard's IAM-91563 is an
economical 3V GaAs MMIC mixer
used for frequency down-conver-
sion. RF frequency coverage is
from 0.8 to 6 GHz and IF coverage
is from 50 to 700 MHz. Packaged
in the SOT-363 package, this
4.0 sq. mm. package requires half
the board space of a SOT-143 and
only 15% the board space of an
SO-8 package.
At 1.9 GHz, the IAM-91563 pro-
vides 9 dB of conversion gain,
thus eliminating an RF or IF gain
stage normally needed with a
lossy mixer. LO drive power is
nominally only -5 dBm, eliminat-
ing an LO buffer amplifier. The
8.5 dB noise figure is low enough
to allow the system to use a low
cost LNA. The -6 dBm Input IP
3
provides adequate system linearity
for most commercial applications,
but is adjustable to 0 dBm.
The circuit uses GaAs PHEMT
technology with proven reliability,
and uniformity. The MMIC
consists of a cascode FET struc-
ture that provides unbalanced gm
modulation type mixing. An on-
chip LO buffer amp drives the
mixer while bias circuitry allows a
single +3V supply (through a
choked IF port). The LO port is
internally matched to 50
. The
RF and IF ports are high imped-
ance and require external match-
ing networks.
Surface Mount Package
SOT-363 (SC-70)
Pin Connections and
Package Marking
IF and V
d
GND
91
LO
GND
RF
1
2
3
6
5
4 SOURCE
BYPASS
Note:
1. Package marking provides orienta-
tion and identification.
LO
1
SOURCE
BYPASS
4
RF
3
GROUND
2, 5
IF and V
d
6
Simplified Schematic
5965-9973E
7-136
IAM-91563 Absolute Maximum Ratings
Absolute
Symbol
Parameter
Units
Maximum
[1]
V
d
Device Voltage, RF output to ground
V
6.0
V
RF,
V
LO
RF voltage or LO voltage to ground
V
+0.5, -1.0
P
in
CW RF Input Power
dBm
+13
T
ch
Channel Temperature
C
150
T
STG
Storage Temperature
C
-65 to 150
Thermal Resistance
[2]
:
ch-c
= 310
C/W
Notes:
1. Permanent damage may occur if
any of these limits are exceeded.
2. T
C
= 25
C (T
C
is defined to be the
temperature at the package pins
where contact is made to the
circuit board).
IAM-91563 Electrical Specifications,
T
C
= 25
C, V
d
= 3 V
Symbol
Parameters and Test Conditions
Units Min. Typ. Max.
Std Dev
[2]
G
test
Gain in test circuit
[1]
RF=1890 GHz, IF=250 MHz
dB
4.0
9.0
NF
test
Noise Figure in test circuit
[1]
RF=1890 GHz, IF=250 MHz
dB
8.5
11.0
I
d
Device Current
mA
6.0
9.0
12.0
NF
Noise Figure (RF & IF with external matching,
f = 0.9 GHz
dB
7.0
IF=250 MHz, LO power=-5 dBm)
f = 1.9 GHz
8.5
0.5
f = 2.4 GHz
11.0
f = 4.0 GHz
16.5
f = 6.0 GHz
18.0
G
c
Conversion gain (RF and IF with external matching,
f = 0.9 GHz
dB
11.0
IF=250 MHz, LO power=-5 dBm)
f = 1.9 GHz
9.0
1.5
f = 2.4 GHz
7.7
f = 4.0 GHz
4.6
f = 6.0 GHz
1.7
P
1 dB
Output power @ 1 dB compression (RF and IF with
f = 0.9 GHz
dBm
-6.7
external matching, IF=250 MHz, LO power =-5 dBm)
f = 1.9 GHz
-8.0
1.3
f = 2.4 GHz
-8.7
f = 4.0 GHz
-15.0
f = 6.0 GHz
-17.8
RL
RF
RF port return loss
f = 0.5 - 6.0 GHz
dB
-1.7
0.2
RL
LO
LO port return loss
f = 0.5 - 6.0 GHz
dB
-9.4
0.3
RL
IF
IF port return loss
f = 50 - 700 MHz
dB
-3.7
0.2
IP
3
Input Third Order Intercept Point
RF = 1.9 GHz, IF = 250 MHz
dBm
-6.0
1.3
I
d
= 9.0 mA, LO power = -5 dBm
IP
3
Input Third Order Intercept Point
RF = 1.9 GHz, IF = 250 MHz
dBm
0
1.1
I
d
= 15 mA, LO power = -2 dBm
ISOL
L-R
LO-RF Isolation
RF = 1.9 GHz
dB
18
ISOL
R-I
RF-IF Isolation (No Match)
dB
2
ISOL
L-I
LO-IF Isolation (No Match)
dB
4
Notes:
1. Guaranteed specifications are 100% tested in the circuit in Figure 18 in the Applications Information section.
2. Standard deviation number is based on measurement of at least 500 parts from three non-consecutive wafer lots during
the initial characterization of this product, and is intended to be used as an estimate for distribution of the typical
specification.
7-137
IAM-91563 Typical Performance,
T
C
= 25
C, V
d
= 3.0 V, RF=1890 MHz, LO = -5 dBm, IF = 250 MHz,
unless otherwise stated.
7-138
IAM-91563 Typical Performance,
T
C
= 25
C, V
d
= 3.0 V, RF=1890 MHz, LO = -5 dBm, IF = 250 MHz,
unless otherwise stated.
0
300
400
500
100
200
600
700
IF FREQUENCY (MHz)
Figure 12. Conversion Gain vs.
Frequency and Temperature.
2
4
6
8
12
10
CONVERSION GAIN
(dB)
T
A
= +85
C
T
A
= +25
C
T
A
= -40
C
0
300
400
500
100
200
600
700
IF FREQUENCY (MHz)
Figure 10. SSB Noise Figure vs.
Frequency and Temperature.
-10
-7
-6
-5
-9
-8
-4
-3
-2
-1
LO POWER (dBm)
Figure 13. Available Conversion Gain
and Noise Figure vs. LO Drive Power.
2
4
6
8
12
10
SSB NOISE FIGURE
(dB)
4
6
8
10
14
12
CONVERSION GAIN and
NOISE FIGURE
(dB)
T
A
= +85
C
T
A
= +25
C
T
A
= -40
C
0
300
400
500
100
200
600
700
IF FREQUENCY (MHz)
Figure 11. Conversion Gain vs.
Frequency and Supply Voltage.
2
4
6
8
12
10
CONVERSION GAIN
(dB)
T
A
= 3.3V
T
A
= 3.0V
T
A
= 2.7V
-10
-7
-6
-5
-9
-8
-4
-3
-2
-1
LO POWER (dBm)
Figure 14. One dB Compression and
Input Third Order Intercept vs. LO
Drive Power.
-10
-8
-6
-4
0
-2
P
1 dB
and INPUT IP
3
(dBm)
0
3
4
5
1
2
6
-20
-18
-16
-14
-12
-10
-8
-6
0
-2
-4
ISOLATION (dB, No Match)
RF FREQUENCY (GHz)
Figure 15. Isolation (LO-RF, RF-IF,
LO-IF) vs. Frequency with no RF and
IF Matching Networks.
0
3
4
5
1
2
6
-40
-36
-32
-28
-24
-20
-16
-12
0
-4
-8
ISOLATION (dB)
RF FREQUENCY (GHz)
Figure 16. Isolation (RF-LO, RF-IF,
LO-IF) vs. Frequency with RF and IF
Matching Networks.
GAIN
NF
IP
3
P
1 dB
RF-IF
LO-IF
LO-RF
RF-LO
RF-IF
LO-IF
7-139
IAM-91563 Typical Reflection Coefficients,
T
C
= 25
C, Z
O
= 50
, V
d
= 3 V
Frequency (GHz)
RF (Mag)
RF (Ang)
LO (Mag)
LO (Ang)
IF (Mag)
IF (Ang)
0.1
0.43
-1
0.64
-8
0.2
0.39
-6
0.63
-9
0.3
0.39
-8
0.63
-10
0.4
0.39
-9
0.63
-10
0.5
0.39
-10
0.62
-11
0.6
0.39
-11
0.62
-12
0.7
0.40
-14
0.62
-13
0.8
0.91
-18
0.39
-14
0.9
0.91
-21
0.39
-16
1
0.91
-23
0.38
-17
1.1
0.92
-25
0.39
-17
1.2
0.91
-28
0.39
-19
1.3
0.88
-29
0.40
-22
1.4
0.87
-32
0.39
-22
1.5
0.85
-33
0.39
-24
1.6
0.84
-34
0.39
-25
1.7
0.83
-35
0.39
-26
1.8
0.82
-37
0.39
-27
1.9
0.82
-37
0.38
-29
2
0.81
-39
0.39
-29
2.1
0.81
-40
0.38
-31
2.2
0.81
-41
0.38
-31
2.3
0.81
-42
0.37
-32
2.4
0.81
-44
0.37
-33
2.5
0.80
-45
0.36
-34
2.6
0.80
-45
0.36
-35
2.7
0.81
-46
0.35
-36
2.8
0.81
-48
0.35
-36
2.9
0.81
-50
0.34
-37
3
0.82
-51
0.34
-37
3.1
0.83
-53
0.33
-38
3.2
0.83
-55
0.33
-39
3.3
0.83
-56
0.32
-39
3.4
0.85
-59
0.32
-40
3.5
0.86
-61
0.31
-40
3.6
0.87
-64
0.32
-42
3.7
0.85
-67
0.31
-42
3.8
0.83
-71
0.30
-45
3.9
0.83
-71
0.30
-43
4
0.82
-73
0.29
-46
4.1
0.83
-76
0.29
-45
4.2
0.83
-79
0.28
-47
4.3
0.84
-82
0.29
-48
4.4
0.84
-85
0.27
-49
4.5
0.84
-87
0.28
-50
4.6
0.85
-91
0.26
-51
4.7
0.84
-95
0.28
-52
4.8
0.85
-97
0.25
-52
4.9
0.85
-100
0.27
-54
5
0.85
-103
0.25
-54
5.1
0.86
-106
0.27
-57
5.2
0.85
-108
0.25
-56
5.3
0.84
-113
0.27
-58
5.4
0.84
-115
0.25
-58
5.5
0.84
-117
0.27
-61
5.6
0.83
-121
0.25
-61
5.7
0.83
-123
0.27
-64
5.8
0.81
-125
0.25
-65
5.9
0.81
-128
0.26
-67
6
0.80
-130
0.24
-65
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