19-2929; Rev 0; 8/03
IT
TION K
VALUA
E
BLE
AVAILA
1200MHz to 2500MHz Adjustable
RF Predistorter
General Description
Features
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
Up to 12dB ACPR Improvement*
Independent Gain and Phase Expansion Controls
Gain Expansion Up to 7dB
Phase Expansion Up to 24°
1200MHz to 2500MHz Frequency Range
Exceptional Gain and Phase Flatness
Group Delay <1.3ns (Gain and Phase Sections
Combined)
±0.04ns
Group Delay Ripple Over a 100MHz Band
Capable of Handling Input Drives Up to +23dBm
On-Chip Temperature Variation Compensation
Single +5V Supply
Low Power Consumption: 75mW (typ)
Fully Integrated into Small 28-Pin Thin QFN
Package
MAX2009
The MAX2009 adjustable RF predistorter is designed to
improve power amplifier (PA) adjacent-channel power
rejection (ACPR) by introducing gain and phase expan-
sion in a PA chain to compensate for the PA’s gain and
phase compression. With its +23dBm maximum input
power level and wide adjustable range, the MAX2009
can provide up to 12dB of ACPR improvement for
power amplifiers operating in the 1200MHz to 2500MHz
frequency band. Lower frequencies of operation can be
achieved with this IC’s counterpart, the MAX2010.
The MAX2009 is unique in that it provides up to 7dB of
gain expansion and 24° of phase expansion as the
input power is increased. The amount of expansion is
configurable through two independent sets of control:
one set adjusts the gain expansion breakpoint
and slope, while the second set controls the same
parameters for phase. With these settings in place, the
linearization circuit can be run in either a static set-and-
forget mode, or a more sophisticated closed-loop
implementation can be employed with real-time soft-
ware-controlled distortion correction. Hybrid correction
modes are also possible using simple lookup tables to
compensate for factors such as PA temperature drift
or PA loading.
The MAX2009 comes in a 28-pin thin QFN exposed
pad (EP) package (5mm x 5mm) and is specified for
the extended (-40°C to +85°C) temperature range.
*Performance
dependent on amplifier, bias, and modulation.
Ordering Information
PART
MAX2009ETI-T
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
28 Thin QFN-EP*
*EP
= Exposed paddle.
Applications
WCDMA/UMTS, cdma2000, DCS1800, and
PCS1900 Base Stations
Feed-Forward PA Architectures
Digital Baseband Predistortion Architectures
Military Applications
WLAN Applications
GND*
ING
GND*
GND*
OUTP
GND*
2
3
4
5
6
7
8
GND*
9
INP
10
GND*
GND*
1
OUTG
GND*
GND*
Functional Diagram/
Pin Configuration
GND*
22
21 V
CCG
GAIN
CONTROL
20 GND*
19 PBRAW
18 PBEXP
17 PBIN
PHASE
CONTROL
16 GND*
15 V
CCP
11
PFS1
12
PFS2
13
PDCS1
14
PDCS2
GCS
GBP
23
GFS
24
28
27
26
25
MAX2009
*INTERNALLY CONNECTED TO EXPOSED GROUND PADDLE.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim's website at www.maxim-ic.com.
1200MHz to 2500MHz Adjustable
RF Predistorter
MAX2009
ABSOLUTE MAXIMUM RATINGS
V
CCG
, V
CCP
to GND ..............................................-0.3V to +5.5V
ING, OUTG, GCS, GFS, GBP to GND......-0.3V to (V
CCG
+ 0.3V)
INP, OUTP, PFS_, PDCS_, PBRAW,
PBEXP, PBIN to GND ............................-0.3V to (V
CCP
+ 0.3V)
Input (ING, INP, OUTP, OUTG) Level ............................+23dBm
PBEXP Output Current ........................................................±1mA
Continuous Power Dissipation (T
A
= +70°C)
28-Pin Thin QFN-EP
(derate 21mW/°C above +70°C) ...............................1667mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature ......................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering 10s) ..................................+300°C
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.
DC ELECTRICAL CHARACTERISTICS
(MAX2009 EV kit; V
CCG
= V
CCP
= +4.75V to +5.25V; no RF signal applied; INP, ING, OUTP, OUTG are AC-coupled and terminated to
50Ω; V
PF_S1
= open; PBEXP shorted to PBRAW; V
PDCS1
= V
PDCS2
= 0.8V; V
PBIN
= V
GBP
= V
GCS
= GND; V
GFS
= V
CCG
; T
A
= -40°C to
+85°C. Typical values are at V
CCG
= V
CCP
= +5.0V, T
A
= +25°C, unless otherwise noted.)
PARAMETER
Supply Voltage
Supply Current
Analog Input Voltage Range
V
CCG
, V
CCP
V
CCP
V
CCG
PBIN, PBRAW
GBP, GFS, GCS
V
GFS
= V
GCS
= V
PBRAW
= 0V
Analog Input Current
Logic-Input High Voltage
Logic-Input Low Voltage
Logic Input Current
V
GBP
= 0 to +5V
V
PBIN
= 0 to +5V
PDCS1, PDCS2 (Note 1)
PDCS1, PDCS2 (Note 1)
-2
0
0
-2
-100
-100
2.0
0.8
+2
CONDITIONS
MIN
4.75
5.8
10
TYP
MAX
5.25
7
12.1
V
CCP
V
CCG
+2
+170
+220
V
V
µA
µA
UNITS
V
mA
V
2
_______________________________________________________________________________________
1200MHz to 2500MHz Adjustable
RF Predistorter
AC ELECTRICAL CHARACTERISTICS
(MAX2009 EV kit, V
CCG
= V
CCP
= +4.75V to +5.25V, 50Ω environment, P
IN
= -20dBm, f
IN
= 1200MHz to 2500MHz, V
GCS
= +1.0V,
V
GFS
= +5.0V, V
GBP
= +1.2V, V
PBIN
= V
PDCS1
= V
PDCS2
= 0V, V
PF_S1
= +5V, V
PBRAW
= V
PBEXP
, T
A
= -40°C to +85°C. Typical values
are at f
IN
= 2140MHz, V
CCG
= V
CCP
= +5V, T
A
= +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER
Operating Frequency Range
VSWR
PHASE CONTROL SECTION
Nominal Gain
Gain Variation Over Temperature
Gain Flatness
Phase-Expansion Breakpoint
Maximum
Phase-Expansion Breakpoint
Minimum
Phase-Expansion Breakpoint
Variation Over Temperature
T
A
= -40°C to +85°C
Over a 100MHz band
V
PBIN
= +5V
V
PBIN
= 0V
T
A
= -40°C to +85°C
V
PF_S1
= +5V, V
PDCS1
= V
PDCS2
= 0V,
P
IN
= -20 dBm to +23 dBm
Phase Expansion
V
PDCS1
= 5V, V
PDCS2
= 0V, V
PF_S1
= +1.5V
V
PDCS1
= 0V, V
PDCS2
= 5V, V
PF_S1
= +1.5V
V
PF_S1
= 0V, V
PDCS1
= V
PDCS2
= +5V,
P
IN
= -20dBm to +23dBm
Phase-Expansion Slope
Maximum
Phase-Expansion Slope Minimum
Phase Slope Variation Over
Temperature
Phase Ripple
Noise Figure
Absolute Group Delay
Group Delay Ripple
Parasitic Gain Expansion
Interconnects de-embedded
Over a 100MHz band
P
IN
= -20dBm to +23dBm
P
IN
= +15dBm
V
PF_S1
= 0V, V
PDCS1
= V
PDCS2
= +5V,
P
IN
= +15dBm
P
IN
= +15dBm, T
A
= -40°C to +85°C
Over a 100MHz band, deviation from linear phase
-7.5
-1.4
±0.1
23
3.7
±1.3
23.7
14.2
9.2
7.6
1.2
0.4
-0.1
±0.15
7.5
0.7
±0.03
0.9
Degrees
/dB
Degrees
/dB
Degrees
/dB
Degrees
dB
ns
ns
dB
Degrees
dB
dB
dB
dBm
dBm
dB
ING, INP, OUTG, OUTP
CONDITIONS
MIN
1200
1.3:1
TYP
MAX
2500
UNITS
MHz
MAX2009
_______________________________________________________________________________________
3
1200MHz to 2500MHz Adjustable
RF Predistorter
MAX2009
AC ELECTRICAL CHARACTERISTICS (continued)
(MAX2009 EV kit, V
CCG
= V
CCP
= +4.75V to +5.25V, 50Ω environment, P
IN
= -20dBm, f
IN
= 1200MHz to 2500MHz, V
GCS
= +1.0V,
V
GFS
= +5.0V, V
GBP
= +1.2V, V
PBIN
= V
PDCS1
= V
PDCS2
= 0V, V
PF_S1
= +5V, V
PBRAW
= V
PBEXP
, T
A
= -40°C to +85°C. Typical values
are at f
IN
= 2140MHz, V
CCG
= V
CCP
= +5V, T
A
= +25°C, unless otherwise noted.) (Notes 1, 2)
PARAMETER
GAIN CONTROL SECTION
-16
Nominal Gain
Gain Variation Over Temperature
Gain Flatness
Gain-Expansion Breakpoint
Maximum
Gain-Expansion Breakpoint
Minimum
Gain-Expansion Breakpoint
Variation Over Temperature
Gain Expansion
Gain-Expansion Slope
Gain Slope Variation Over
Temperature
Noise Figure
Absolute Group Delay
Group Delay Ripple
Phase Ripple
Parasitic Phase Expansion
Interconnects de-embedded
Over a 100MHz band
Over a 100MHz band, deviation from linear phase
P
IN
= -20dBm to +23dBm
V
GCS
= 0V, V
GFS
= +5V
V
GCS
= +5V, V
GFS
= 0V
T
A
= -40°C to +85°C
Over a 100MHz band
V
GBP
= +5V
V
GBP
= +0.5V
T
A
= -40°C to +85°C
V
GFS
= +5V, P
IN
= -20dBm to +23dBm
V
GFS
= 0V, P
IN
= -20dBm to +23dBm
V
GFS
= +5V, P
IN
= +15dBm
V
GFS
= +0V, P
IN
= +15dBm
P
IN
= +15dBm, T
A
= -40°C to +85°C
-23
-8.5
-1
±0.3
23
-3
-0.3
6.6
3.6
0.5
0.26
-0.04
16
0.61
±0.01
±0.07
5
dB
dB
dBm
dBm
dB
dB
dB/dB
dB/dB
dB
ns
ns
Degrees
Degrees
dB
CONDITIONS
MIN
TYP
MAX
UNITS
Note 1:
Guaranteed by design and characterization.
Note 2:
All limits reflect losses and characteristics of external components shown in the
Typical Application Circuit,
unless otherwise
noted.
4
_______________________________________________________________________________________
1200MHz to 2500MHz Adjustable
RF Predistorter
MAX2009
Typical Operating Characteristics
Phase Control Section
(MAX2009 EV kit, V
CCP
= +5.0V, P
IN
= -20dBm, V
PBIN
= 0V, V
PF_S1
= +5.0V, V
PDCS1
= V
PDCS2
= 0V, f
IN
= 2140MHz, T
A
= +25°C,
unless otherwise noted.)
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
6.2
6.1
SUPPLY CURRENT (mA)
6.0
5.9
5.8
5.7
5.6
5.5
5.4
5.3
4.75
4.85
4.95
5.05
5.15
5.25
SUPPLY VOLTAGE (V)
35
B
40
1.1
2.1 2.3
1.9
FREQUENCY (GHz)
A = V
PDCS1
= V
PDCS2
= V
PF_S1
= 0V
B = V
PDCS1
= V
PDCS2
= 0V, V
PF_S1
= 5V
C = V
PDCS1
= V
PDCS2
= 5V, V
PF_S1
= 0V
D = V
PDCS1
= V
PDCS2
= V
PF_S1
= 5V
1.3
1.5
1.7
2.5
40
1.1
1.7 1.9
2.1 2.3
FREQUENCY (GHz)
A = V
PDCS1
= V
PDCS2
= V
PF_S1
= 0V
B = V
PDCS1
= V
PDCS2
= 0V, V
PF_S1
= 5V
C = V
PDCS1
= V
PDCS2
= 5V, V
PF_S1
= 0V
D = V
PDCS1
= V
PDCS2
= V
PF_S1
= 5V
1.3
1.5
2.5
35
T
A
= -40°C
T
A
= +85°C
T
A
= +25°C
MAX2009TOC01
SMALL-SIGNAL INPUT RETURN LOSS
vs. FREQUENCY
MAX2009TOC02
SMALL-SIGNAL OUTPUT RETURN LOSS
vs. FREQUENCY
5
OUTPUT RETURN LOSS (dB)
10
15
20
25
30
D
B
C
MAX2009TOC03
6.3
0
5
INPUT RETURN LOSS (dB)
10
15
D
20
25
30
A
C
0
A
LARGE-SIGNAL INPUT RETURN LOSS
vs. FREQUENCY
MAX2009TOC04
LARGE-SIGNAL OUTPUT RETURN LOSS
vs. FREQUENCY
5
OUTPUT RETURN LOSS (dB)
10
GAIN (dB)
15
20
25
30
35
40
2.5
1.1
2.1 2.3
1.9
FREQUENCY (GHz)
A = V
PDCS1
= V
PDCS2
= V
PF_S1
= 0V
B = V
PDCS1
= V
PDCS2
= 0V, V
PF_S1
= 5V
C = V
PDCS1
= V
PDCS2
= 5V, V
PF_S1
= 0V
D = V
PDCS1
= V
PDCS2
= V
PF_S1
= 5V
1.3
1.5
1.7
2.5
B
D
C
P
IN
= +15dBm
MAX2009TOC05
SMALL-SIGNAL GAIN
vs. FREQUENCY
-5.5
-6.0
-6.5
-7.0
-7.5
-8.0
-8.5
T
A
= +85°C
T
A
= +25°C
T
A
= -40°C
MAX2009TOC06
0
P
IN
= +15dBm
5
INPUT RETURN LOSS (dB)
10
15
20
25
30
35
40
1.1
2.1 2.3
1.9
FREQUENCY (GHz)
A = V
PDCS1
= V
PDCS2
= V
PF_S1
= 0V
B = V
PDCS1
= V
PDCS2
= 0V, V
PF_S1
= 5V
C = V
PDCS1
= V
PDCS2
= 5V, V
PF_S1
= 0V
D = V
PDCS1
= V
PDCS2
= V
PF_S1
= 5V
1.3
1.5
1.7
B
A
D
C
0
-5.0
A
-9.0
-9.5
-10.0
1.1
1.3
1.5
1.7
1.9
2.1
2.3
2.5
FREQUENCY (GHz)
_______________________________________________________________________________________
5
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