
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
M
High-Gain Vector Multipliers
________________________________________________________________
Maxim Integrated Products
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.
1
Ordering Information
19-2728; Rev 0; 1/03
PART
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
32 Thin QFN-EP*
32 Thin QFN-EP*
32 Thin QFN-EP*
MAX2045
ETJ-T
MAX2046
ETJ-T
MAX2047
ETJ-T
*
EP = Exposed paddle.
MAX2045
MAX2046
MAX2047
2
1
3
4
5
6
7
8
23
24
22
21
20
19
18
17
1
9
1
1
1
1
1
1
3
3
3
2
2
2
2
2
VI1
VI2
VQ1
VQ2
II1
II2
IQ1
IQ2
R
V
CC
G
R
R
G
G
G
G
V
CC
GND
GND
GND
RBIAS
GND
GND
G
G
G
G
G
G
R
R
90
°
PHASE
SHIFTER
OUTPUT
STAGE
CONTROL
AMPLIFIER I
CONTROL
AMPLIFIER Q
VECTOR
MULTIPLIER
2.5V
REFERENCE
QFN
Pin Configuration/Block Diagram