General Description
The MAX2045/MAX2046/MAX2047 low-cost, fully inte-
grated vector multipliers alter the magnitude and phase
of an RF signal. Each device is optimized for the UMTS
(MAX2045), DCS/PCS (MAX2046), or cellular/GSM
(MAX2047) frequency bands. These devices feature
differential RF inputs and outputs.
The MAX2045/MAX2046/MAX2047 provide vector
adjustment through the differential I/Q amplifiers. The
I/Q amplifiers can interface with voltage and/or current
digital-to-analog converters (DACs). The voltage inputs
are designed to interface to a voltage-mode DAC, while
the current inputs are designed to interface to a current-
mode DAC. An internal 2.5V reference voltage is provid-
ed for applications using single-ended voltage DACs.
The MAX2045/MAX2046/MAX2047 operate from a 4.75V
to 5.25V single supply. All devices are offered in a com-
pact 5mm
5mm, 32-lead thin QFN exposed-paddle
packages.
The MAX2045/MAX2046/MAX2047 evaluation kits are
available, contact factory for availability.
Applications
UMTS/PCS/DCS/Cellular/GSM Base Station
Feed-Forward and Predistortion Power Amplifiers
RF Magnitude and Phase Adjustment
RF Cancellation Loops
Beam-Forming Applications
Features
o Multiple RF Frequency Bands of Operation
2040MHz to 2240MHz (MAX2045)
1740MHz to 2060MHz (MAX2046)
790MHz to 1005MHz (MAX2047)
o 0.2dB Gain Flatness
o 1 Phase Flatness
o 3dB Control Bandwidth: 260MHz
o 15dBm Input IP3
o 15dB Gain Control Range
o Continuous 360 Phase Control Range
o 6.5dB Maximum Gain for Continuous Phase
o On-Chip Reference for Single-Ended
Voltage-Mode Operation
o 800mW Power Consumption
o Space-Saving 5mm x 5mm Thin QFN Package
o Single 5V supply
MAX2045/MAX2046/MAX2047
High-Gain Vector Multipliers
________________________________________________________________ Maxim Integrated Products
1
Ordering Information
19-2728; Rev 0; 1/03
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
PART
TEMP RANGE
PIN-PACKAGE
MAX2045ETJ-T
-40C to +85C
32 Thin QFN-EP*
MAX2046ETJ-T
-40C to +85C
32 Thin QFN-EP*
MAX2047ETJ-T
-40C to +85C
32 Thin QFN-EP*
MAX2045
MAX2046
MAX2047
2
1
3
4
5
6
7
8
23
24
22
21
20
19
18
17
10
9
11
12
13
14
15
16
31
32
30
29
28
27
26
25
VI1
VI2
VQ1
VQ2
II1
II2
IQ1
IQ2
REFOUT
V
CC
GND
RFOUT1
RFOUT2
GND
GND
GND
GND
V
CC
GND
GND
GND
RBIAS
GND
GND
GND
GND
GND
GND
GND
GND
RFIN1
RFIN2
90
PHASE
SHIFTER
OUTPUT
STAGE
CONTROL
AMPLIFIER I
CONTROL
AMPLIFIER Q
VECTOR
MULTIPLIER
2.5V
REFERENCE
QFN
Pin Configuration/Block Diagram
*EP = Exposed paddle.
MAX2045/MAX2046/MAX2047
High-Gain Vector Multipliers
2
_______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit as shown in Figure 1; V
CC
= 4.75V to 5.25V, T
A
= -40C to +85C, R
BIAS
= 280
, no RF inputs applied, RF
input and output ports are terminated with 50
. Typical values are at V
CC
= 5V and T
A
= +25C, unless otherwise noted.)
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
V
CC
to GND .............................................................-0.3V to +6V
VI1, V12, VQ1, VQ2, RFIN1, RFIN2,
RFOUT1, RFOUT2 ....................................-0.3V to V
CC
+ 0.3V
RFOUT1, RFOUT2 Sink Current..........................................35mA
REFOUT Source Current.......................................................4mA
II1, II2, IQ1, IQ2 ........................................................-0.3V to +1V
II1, II2, IQ1, IQ2 Sink Current ...........................................+10mA
Continuous RF Input Power (CW)...................................+15dBm
Continuous Power Dissipation (T
A
= +70C)
32-Pin Thin QFN (derate 21.3mW/C above +70C) .......1.7W
Operating Temperature Range ...........................-40C to +85C
Junction Temperature ......................................................+150C
Storage Temperature Range .............................-40C to +150C
Lead Temperature (soldering, 10s) .................................+300C
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Supply Voltage Range
V
CC
4.75
5
5.25
V
MAX2045
120
160
200
MAX2046
120
160
200
Operating Supply Current
I
CC
MAX2047
120
160
200
mA
Differential Input Resistance,
VI1 to VI2, VQ1 to VQ2
Input resistance between VI1 and VI2 or
VQ1 and VQ2
6.5
9
11.5
k
Common-Mode Input Voltage,
VI1, VI2, VQ1, VQ2
V
CM
2.5
V
Input Resistance, II1, II2, IQ1,
IQ2
Single-ended resistance to ground
150
200
250
Reference Voltage
V
REFOUT
REFOUT unloaded
2.3
2.45
2.6
V
AC ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit as shown in Figure 1; V
CC
= 4.75V to 5.25V, T
A
= -40C to +85C, R
BIAS
= 280
, f
IN
= 2.14GHz
(MAX2045), f
IN
= 1.9GHz (MAX2046), f
IN
= 915MHz (MAX2047), input current range = 0 to 4mA (if using a current-mode DAC), and
differential input voltage range = 0 to 0.707V (if using a voltage-mode DAC). If using a current-mode DAC, voltage mode I/Q inputs
are left open. If using a voltage-mode DAC, all current-mode I/Q inputs are left open. Typical values are at V
CC
= 5V and T
A
=
+25C, unless otherwise noted.) (Notes 1, 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
RF Differential Input Impedance
50
RF Differential Output Impedance
300
RF Differential Load Impedance
200
Continuous Phase Range
0
360
Degrees
MAX2045/MAX2046/MAX2047
High-Gain Vector Multipliers
_______________________________________________________________________________________
3
MAX2045 ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit as shown in Figure 1; V
CC
= 4.75V to 5.25V, T
A
= -40C to +85C, R
BIAS
= 280
, f
IN
= 2.14GHz, input cur-
rent range = 0 to 4mA (if using a current-mode DAC), and differential input voltage range = 0 to 0.707V (if using a voltage-mode
DAC). If using a current-mode DAC, voltage mode I/Q inputs are left open. If using a voltage-mode DAC, all current-mode I/Q inputs
are left open. Typical values are at V
CC
= 5V and T
A
= +25C, unless otherwise noted.) (Notes 1, 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Frequency Range
2040
2240
MHz
RF Input Return Loss
-14
dB
RF Output Return Loss
-16.4
dB
VOLTAGE MODE
VI = VQ = 0.707V
(radius = 1V)
7
VI = VQ = 0.5V
(radius = 0.707V)
3.4
VI = VQ = 0.25V
(radius = 0.35V)
-3
Power Gain
VI = VQ = 0.125V
(radius = 0.175V)
-8.7
dB
Power-Gain Range
Difference in gain between VI = VQ = 0.707V and
VI = VQ = 0.125V
15.7
dB
Reverse Isolation
Over entire control range
-74
dB
Maximum Power Gain for
Continuous Coverage of Phase
Change
0 to 360 (radius = 1V)
6.1
dB
Maximum Power Gain with
Reduced Phase Coverage
0 to 360 (radius = 1V)
7
dB
Group Delay
VI = VQ = 0.707V (radius = 1V)
1.38
ns
Gain Drift Over Temperature
VI = VQ = 0.707V (radius = 1V)
-0.027
dB/
C
Gain Flatness Over Frequency
VI = VQ = 0.707V (radius = 1V); UMTS,
f
IN
= 2140MHz
100MHz
0.21
dB
Phase Flatness Over Frequency
Electrical delay removed, VI = VQ = 0.707V
(radius = 1V), UMTS, f
IN
= 2140MHz 100MHz
0.2
Degrees
VI = VQ = 0.707V
(radius = 1V)
-147.7
VI = VQ = 0.5V
(radius = 0.707V)
-148.3
VI = VQ = 0.25V
(radius = 0.35V)
-148.2
Output Noise Power
VI = VQ = 0.125V
(radius = 0.175V)
-148.1
dBm/Hz
VI = VQ = 0.707V
(radius = 1V)
6.7
IP1dB
VI = VQ = 0.125V
(radius = 0.175V)
9.3
dBm
VI = VQ = 0.707V
(radius = 1V)
15.2
IIP3
VI = VQ = 0.125V
(radius = 0.175V)
14.7
dBm
MAX2045/MAX2046/MAX2047
High-Gain Vector Multipliers
4
_______________________________________________________________________________________
MAX2046 ELECTRICAL CHARACTERISTICS
(Typical Operating Circuit as shown in Figure 1; V
CC
= 4.75V to 5.25V, T
A
= -40C to +85C, R
BIAS
= 280
, f
IN
= 1.9GHz, input cur-
rent range = 0 to 4mA (if using a current-mode DAC), and differential input voltage range = 0 to 0.707V (if using a voltage-mode
DAC). If using a current-mode DAC, voltage mode I/Q inputs are left open. If using a voltage-mode DAC, all current-mode I/Q inputs
are left open. Typical values are at V
CC
= 5V and T
A
= +25C, unless otherwise noted.) (Notes 1, 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Frequency Range
1740
2060
MHz
RF Input Return Loss
-21.1
dB
RF Output Return Loss
-21.7
dB
VOLTAGE MODE
VI = VQ = 0.707V
(radius = 1V)
7.4
VI = VQ = 0.5V
(radius = 0.707V)
3.8
VI = VQ = 0.25V
(radius = 0.35V)
-2.5
Power Gain
VI = VQ = 0.125V
(radius = 0.175V)
-8.2
dB
Power-Gain Range
Difference in gain between VI = VQ = 0.707V and
VI = VQ = 0.125V
15.6
dB
Reverse Isolation
Over entire control range
-76
dB
Maximum Power Gain for
Continuous Coverage of Phase
Change
0 to 360 (radius = 1V)
6.5
dB
Maximum Power Gain with
Reduced Phase Coverage
0 to 360 (radius = 1V)
7.4
dB
Group Delay
VI = VQ = 0.707V (radius = 1V)
1.54
ns
Gain Drift Over Temperature
VI = VQ = 0.707V (radius = 1V)
-0.026
dB/
C
PCS, f
IN
= 1960MHz
100MHz
0.14
Gain Flatness Over Frequency
VI = VQ = 0.707V
(radius = 1V)
DCS, f
IN
= 1842.5MHz
100MHz
0.3
dB
MAX2045 ELECTRICAL CHARACTERISTICS (continued)
(Typical Operating Circuit as shown in Figure 1; V
CC
= 4.75V to 5.25V, T
A
= -40C to +85C, R
BIAS
= 280
, f
IN
= 2.14GHz, input cur-
rent range = 0 to 4mA (if using a current-mode DAC), and differential input voltage range = 0 to 0.707V (if using a voltage-mode
DAC). If using a current-mode DAC, voltage mode I/Q inputs are left open. If using a voltage-mode DAC, all current-mode I/Q inputs
are left open. Typical values are at V
CC
= 5V and T
A
= +25C, unless otherwise noted.) (Notes 1, 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
CURRENT MODE
II1 = IQ1 = 4mA, II2 = IQ2 = 0mA
6.2
Power Gain (Note 4)
II1 = IQ1 = 1mA, II2 = IQ2 = 0mA
-8.7
dB
Power-Gain Range
Difference in gain between II1 = IQ1 = 4mA, II2 = IQ2 =
0mA and II1 = IQ1 = 1mA, II2 = IQ2 = 0mA
14.9
dB
Gain Flatness Over Frequency
II1 = IQ1 = 4mA, II2 = IQ2 = 0mA; UMTS,
f
IN
= 2140MHz
100MHz
0.27
dB
Phase Flatness Over Frequency
Electrical delay removed, II1 = IQ1 = 4mA,
II2 = IQ2 = 0mA
0.8
Degrees
MAX2045/MAX2046/MAX2047
High-Gain Vector Multipliers
_______________________________________________________________________________________
5
MAX2046 ELECTRICAL CHARACTERISTICS (continued)
(Typical Operating Circuit as shown in Figure 1; V
CC
= 4.75V to 5.25V, T
A
= -40C to +85C, R
BIAS
= 280
, f
IN
= 1.9GHz, input cur-
rent range = 0 to 4mA (if using a current-mode DAC), and differential input voltage range = 0 to 0.707V (if using a voltage-mode
DAC). If using a current-mode DAC, voltage mode I/Q inputs are left open. If using a voltage-mode DAC, all current-mode I/Q inputs
are left open. Typical values are at V
CC
= 5V and T
A
= +25C, unless otherwise noted.) (Notes 1, 2, 3)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
PCS, f
IN
= 1960MHz
100MHz
1.3
Phase Flatness Over Frequency
Electrical delay removed,
VI = VQ = 0.707V
(radius = 1V)
DCS, f
IN
= 1842.5MHz
100MHz
1.2
Degrees
VI = VQ = 0.707V
(radius = 1V)
-146.8
VI = VQ = 0.5V
(radius = 0.707V)
-147.4
VI = VQ = 0.25V
(radius = 0.35V)
-147.4
Output Noise Power
VI = VQ = 0.125V
(radius = 0.175V)
-147.3
dBm/Hz
VI = VQ = 0.707V
(radius = 1V)
6.5
IP1dB
VI = VQ = 0.125V
(radius = 0.175V)
9.1
dBm
VI = VQ = 0.707V
(radius = 1V)
15.2
IIP3
VI = VQ = 0.125V
(radius = 0.175V)
14.8
dBm
CURRENT MODE
II1 = IQ1 = 4mA, II2 = IQ2 = 0mA
6.6
Power Gain (Note 4)
II1 = IQ1 = 1mA, II2 = IQ2 = 0mA
-8.2
dB
Power-Gain Range
Difference in gain between II1 = IQ1 = 4mA, II2 = IQ2 =
0mA and II1 = IQ1 = 1mA, II2 = IQ2 = 0mA
14.8
dB
PCS, f
IN
= 1960MHz
100MHz
0.14
Gain Flatness Over Frequency
II1 = IQ1 = 4mA, II2 = IQ2 =
0mA
DCS, f
IN
= 1842.5MHz
100MHz
0.33
dB
PCS, f
IN
= 1960MHz
100MHz
0.8
Phase Flatness Over Frequency
Electrical delay removed,
II1 = IQ1 = 4mA,
II2 = IQ2 = 0mA
DCS, f
IN
= 1842.5MHz
100MHz
1.6
Degrees
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