General Description
The MAX2267/MAX2268/MAX2269 power amplifiers are
optimized for IS-98-based CDMA and PDC cellular telephones operating in the Japanese cellular-frequency
band. When matched for CDMA operation, the amplifiers achieve 27dBm output power with 35% efficiency
(MAX2268), with margin over the adjacent and alternate
channel specification. At a +17dBm output—a very
common power level for CDMA phones—the MAX2268
still has 7% efficiency, yielding excellent overall talk
time. At the same power level, the MAX2267/MAX2269
have an unprecedented 12%/17% efficiency, while still
obtaining 28%/29% efficiency at maximum output
power.
The MAX2267/MAX2268/MAX2269 have internally referenced bias ports that are normally terminated with simple resistors. The bias ports allow customization of
ACPR margin and gain. They can also be used to
“throttle back” bias current when generating low power
levels. The MAX2267/MAX2268/MAX2269 have excellent gain stability over temperature (±0.8dB), so overdesign of driver stages and excess driver current are
dramatically reduced, further increasing the phone’s
talk time. The devices can be operated from +2.7V to
+4.5V while meeting all ACPR specifications over the
entire temperature range.
The devices are packaged in a 16-pin TSSOP with
exposed paddle (EP). For module or direct chip attach
applications, the MAX2267 is also available in die form.
Applications
Cellular-Band CDMA Phones
Cellular-Band PDC Phones
2-Way Pagers
Power-Amplifier Modules
Features
♦ Low Average CDMA Current Consumption in
Typical Urban Scenario
55mA (MAX2267)
90mA (MAX2268)
50mA (MAX2269)
♦ 0.5µA Shutdown Mode Eliminates External
Supply Switch
♦ ±0.8dB Gain Variation Over Temperature
♦ No External Reference or Logic Interface
Circuitry Needed
♦ Supply Current and ACPR Margin Dynamically
Adjustable
♦ +2.7V to +4.5V Single-Supply Operation
♦ 35% Efficiency at +2.7V Operation
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
________________________________________________________________ Maxim Integrated Products 1
TOP VIEW
MAX2267/MAX2269
IN1 IN0
BIAS2H
V
CC
GND
NFP
OUT0
BIAS1L
OUT1
PWR
V
CC
SHDN
BIAS1H
V
CC
BIAS2L
OUT1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
BIAS
TSSOP-EP
19-1567; Rev 0; 1/00
EVALUATION KIT MANUAL
FOLLOWS DATA SHEET
Pin Configurations/
Functional Diagrams
Ordering Information
Selector Guide
*Contact factory for dice specifications.
Pin Configurations continued at end of data sheet.
16 TSSOP-EP
Dice*
16 TSSOP-EP
PIN-
PACKAGE
TEMP. RANGE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
MAX2268EUE
MAX2267E/D
MAX2267EUE
PART
16 TSSOP-EP-40°C to +85°C
MAX2269EUE
TSSOP-EP
5mm x 6.4mm
MAX2269 29 17 —
DEVICE
MAX2267
MAX2268 34
28 12
7 41
—
PDC AT
+29dBm
CDMA AT
+17dBm
CDMA AT
+27dBm
HIGH POWER-ADDED EFFICIENCY (%)
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
2 _______________________________________________________________________________________
ABSOLUTE MAXIMUM RATINGS
DC ELECTRICAL CHARACTERISTICS
(VCC= +2.7V to +4.5V no input signal applied, V
SHDN
= 2.0V, TA= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at V
CC
= +3.5V and TA= +25°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.
VCCto GND (no RF input) ........................................-0.3V to +5V
Logic Inputs to GND...................................-0.3V to (VCC+ 0.3V)
BIAS_ _ to GND..........................................-0.3V to (VCC+ 0.3V)
RF Input Power ...................................................+6dBm (20mW)
Logic Input Current...........................................................±10mA
Output VSWR with +6dBm Input ..........................................2.5:1
Total DC Power Dissipation (T
PADDLE
= +100°C)
16-Pin TSSOP-EP (derate 60mW/°C
above T
PADDLE
= +100°C)..............................................4W
θJA.................................................................................8°C/W
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
AC ELECTRICAL CHARACTERISTICS—MAX2267
(MAX2267 EV kit, VCC= V
PWR
= V
SHDN
= +3.5V, fIN= 906MHz, CDMA modulation, SHDN = VCC, matching networks tuned for
887MHz to 925MHz operation, 50Ω system, T
A
= +25°C, unless otherwise noted.)
MAX2267/MAX2269
MAX2268
SHDN = PWR = GND
Logic = V
CC
Logic = GND
CONDITIONS
34
100
I
CC
V
2.7 4.5
V
CC
Operating Voltage Range
Idle Current
V
0.8
Logic Threshold Low
V
2.0
Logic Threshold High
90
µA
0.5 10
I
CC
Shutdown Supply Current
µA
-1 5
Logic Input Current High
µA
-1 1
Logic Input Current Low
UNITSMIN TYP MAXSYMBOLPARAMETER
PWR = V
CC
PWR = GND
14 15.5
PWR = GND,
VCC= 2.8V
PWR = GND
PWR = VCC= 2.8V
PWR = V
CC
dB
24.5 26
G
P
Power Gain (Note 1)
PWR = VCCor GND
ACPR specification
met with
f
IN
= 887MHz to
925MHz
ACPR specification
met with
f
IN
= 887MHz to
925MHz
CONDITIONS
MHz
887 925
f
IN
Frequency Range (Notes 1, 2)
dBm
27
P
OUT
Output Power
(High-Power Mode) (Note 1)
24.5 25.5
dBm
16 17.5
P
OUT
Output Power
(Low-Power Mode) (Note 1)
UNITSMIN TYP MAXSYMBOLPARAMETER
mA
TA= +25°C
TA= T
MIN
to T
MAX
, relative to TA= +25°C dB±0.8
Gain Variation vs. Temperature
(Note 1)
20.5 23
23
PWR = GND
TA= T
MIN
to T
MAX
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
_______________________________________________________________________________________ 3
AC ELECTRICAL CHARACTERISTICS—MAX2268
(MAX2268 EV kit, VCC= V
SHDN
= +3.5V, fIN= 906MHz, CDMA modulation, matching networks tuned for 887MHz to 925MHz opera-
tion, 50Ω system, T
A
= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Adjacent-Channel Power Ratio
Limit (Notes 1, 2)
ACPR -44 -48 dBc
Alternate-Channel Power Ratio
Limit (Notes 1, 2)
ACPR -56 -57.5 dBc
Power-Mode Switching Time 550 ns
Turn-On Time (Notes 1, 4) 15µs
Maximum Input VSWR VSWR 2.3:1
Nonharmonic Spurious due
to Load Mismatch (Notes 1, 5)
-60 dBc
Noise Power (Note 6)
-137
-134
Harmonic Suppression 32 dBc
CONDITIONS
(Note 4)
VCC= 2.8V to 4.5V, offset = 885kHz,
30kHz BW, f
IN
= 887MHz to 925MHz
VCC= 2.8V to 4.5V, offset = 1980kHz,
30kHz BW, f
IN
= 887MHz to 925MHz
PWR = VCCor GND
fIN= 887MHz to 925MHz, PWR = GND or V
CC
PIN= +6dBm
Measured at 851MHz
PWR = GND, measured at 851MHz
(Note 7)
dBm/Hz
PARAMETER SYMBOL MIN TYP MAX UNITS
24.5 25.5
Output Power (Note 1) P
OUT
27
dBm
Gain Variation vs. Temperature
(Note 1)
±0.7 dB
Adjacent-Channel Power Ratio
(Notes 1, 2)
ACPR -44 -48 dBc
Alternate-Channel Power Ratio
(Notes 1, 2)
ACPR -56 -57.5 dBc
Frequency Range (Notes 1, 2) f
IN
887 925
MHz
24
CONDITIONS
ACPR specification
met with
f
IN
= 887MHz to
925MHz
TA= T
MIN
to T
MAX
, relative to TA= +25°C
VCC= 2.8V to 4.5V, offset = 885kHz,
30kHz BW, f
IN
= 887MHz to 925MHz
VCC= 2.8V to 4.5V, offset = 1980kHz,
30kHz BW, f
IN
= 887MHz to 925MHz
TA= T
MIN
to T
MAX
Power Gain (Note 1) G
P
25.5 27
dB
TA= +25°C
AC ELECTRICAL CHARACTERISTICS—MAX2267 (continued)
(MAX2267 EV kit, VCC= V
PWR
= V
SHDN
= +3.5V, fIN= 906MHz, CDMA modulation, SHDN = VCC, matching networks tuned for
887MHz to 925MHz operation, 50Ω system, T
A
= +25°C, unless otherwise noted.)
28PWR = VCC, P
OUT
= +27dBm
Power-Added Efficiency
(Note 3)
PAE
12
%
PWR = GND, P
OUT
= 17.5dBm
VCC= 3.5V
VCC= 2.8V
Power-Added Efficiency
(Note 3)
PAE
35
%
PINadjusted to give P
OUT
= 27dBm
Turn-On Time (Notes 1, 4) 15µs
Maximum Input VSWR VSWR 1.5:1f
IN
= 887MHz to 925MHz
PINadjusted for P
OUT
= 13.6dBm 5.5
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
4 _______________________________________________________________________________________
AC ELECTRICAL CHARACTERISTICS—MAX2268 (continued)
(MAX2268 EV kit, VCC= V
SHDN
= +3.5V, fIN= 906MHz, CDMA modulation, matching networks tuned for 887MHz to 925MHz opera-
tion, 50Ω system, T
A
= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Nonharmonic Spurious Due
to Load Mismatch (Notes 1, 5)
-60 dBc
Noise Power (Note 6) -138 dBm/Hz
Harmonic Suppression 47 dBc
CONDITIONS
PIN= +6dBm
Measured at 851MHz
(Note 7)
AC ELECTRICAL CHARACTERISTICS—MAX2269
(MAX2269 EV kit, VCC= V
PWR
= V
SHDN
= +3.5V, fIN= 906MHz, CDMA modulation, SHDN = VCC, matching networks tuned for
887MHz to 925MHz operation, 50Ω system, T
A
= +25°C, unless otherwise noted.)
17PWR = GND, P
OUT
= 17dBm
PWR = VCC, P
OUT
= +27dBm
%
29
PAE
Power-Added Efficiency
(Note 3)
VCC= 2.8V to 4.5V, offset = 1980kHz,
30kHz BW, f
IN
= 887MHz to 925MHz
dBc-56 -57.5ACPR
Alternate-Channel Power Ratio
Limit (Notes 1, 2)
VCC= 2.8V to 4.5V, offset = 885kHz,
30kHz BW, f
IN
= 887MHz to 925MHz
dBc-44 -48ACPR
Adjacent-Channel Power Ratio
Limit (Notes 1, 2)
PWR = GND,
V
CC
= 2.8V
13.5 15
PWR = GND
PWR = VCC= 2.8V
PWR = V
CC
dB
24.5 26
G
P
Power Gain (Note 1)
PWR = V
CC
PWR = VCCor GND
ACPR specification
met with
f
IN
= 887MHz to
925MHz
ACPR specification
met with
f
IN
= 887MHz to
925MHz
CONDITIONS
MHz
887 925
f
IN
Frequency Range (Notes 1, 2)
dBm
27
P
OUT
Output Power
(High-Power Mode) (Note 1)
24.5 25.5
dBm
15.5 17
P
OUT
Output Power
(Low-Power Mode) (Note 1)
UNITSMIN TYP MAXSYMBOLPARAMETER
TA= +25°C
TA= T
MIN
to T
MAX
, relative to TA= +25°C dB±0.8
Gain Variation vs. Temperature
(Note 1)
PWR = GND
TA= T
MIN
to T
MAX
23.5 26
23
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
_______________________________________________________________________________________ 5
Note 1: Minimum and maximum values are guaranteed by design and characterization, not production tested.
Note 2: P
MAX
is met over this frequency range at the ACPR limit with a single matching network. For optimum performance at other
frequencies, the output matching network must be properly designed. See the Applications Information section. Operation
between 750MHz and 1000MHz is possible but has not been characterized.
Note 3: PAE is specified into a 50Ω load, while meeting the ACPR requirement.
Note 4: Time from logic transition until P
OUT
is within 1dB of its final mean power.
Note 5: Murata isolator as load with 20:1 VSWR any phase angle after isolator.
Note 6: Noise power can be improved by using the circuit in Figures 1 and 2.
Note 7: Harmonics measured on the evaluation kit, which provides some harmonic attenuation in addition to the rejection provided
by the IC. The combined suppression is specified.
AC ELECTRICAL CHARACTERISTICS—MAX2269 (continued)
(MAX2269 EV kit, VCC= V
PWR
= V
SHDN
= +3.5V, fIN= 906MHz, CDMA modulation, SHDN = VCC, matching networks tuned for
887MHz to 925MHz operation, 50Ω system, T
A
= +25°C, unless otherwise noted.)
PARAMETER SYMBOL MIN TYP MAX UNITS
Power-Mode Switching Time 550 ns
Turn-On Time (Notes 1, 4) 15µs
Maximum Input VSWR VSWR 2.4:1
Nonharmonic Spurious due to
Load Mismatch (Notes 1, 5)
-60 dBc
Noise Power (Note 6)
-137
-130
Harmonic Suppression 32 dBc
CONDITIONS
(Note 4)
PWR = VCCor GND
fIN= 887MHz to 925MHz, PWR = GND or V
CC
PIN= +6dBm
Measured at 851MHz
PWR = GND, measured at 851MHz
(Note 7)
dBm/Hz
0
20
40
60
80
100
120
140
2.5 3.53.0 4.0 4.5 5.0 5.5
MAX2267
SHUTDOWN CURRENT vs. SUPPLY VOLTAGE
MAX2267/9-01
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
TA = +85°C
TA = -40°C
TA = +25°C
PWR = GND
SHDN = GND
NO INPUT DRIVE
20
22
26
24
28
30
2.5 3.53.0 4.0 4.5 5.0
MAX2267
GAIN vs. SUPPLY VOLTAGE
MAX2267/9-02
SUPPLY VOLTAGE (V)
GAIN (dB)
PWR = V
CC
TA = -40°C
TA = +85°C
TA = +25°C
18
20
24
22
26
28
2.5 4.03.0
3.5
4.5 5.0
MAX2267
GAIN vs. SUPPLY VOLTAGE
MAX2267/9-03
SUPPLY VOLTAGE (V)
GAIN (dB)
PWR = GND
TA = -40°C
TA = +85°C
TA = +25°C
Typical Operating Characteristics
(MAX2267/MAX2268/MAX2269 EV kits, VCC= +3.5V, SHDN = VCC, CDMA modulation, TA= +25°C, unless otherwise noted.)
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
6 _______________________________________________________________________________________
PWR = V
CC
TA = +25°C
TA = -40°C
TA = +85°C
24
26
30
28
32
34
2.5 3.53.0 4.0 4.5 5.0
MAX2267
POWER-ADDED EFFICIENCY
vs. SUPPLY VOLTAGE
MAX2267/9-04
SUPPLY VOLTAGE (V)
PAE (%)
8
9
11
10
13
12
14
2.5 4.03.0
3.5
4.5 5.0
MAX2267
POWER-ADDED EFFICIENCY
vs. SUPPLY VOLTAGE
MAX2267/9-05
SUPPLY VOLTAGE (V)
PAE (%)
TA = -40°C
TA = +85°C
TA = +25°C
PWR = GND
25
28
27
26
29
30
31
32
04
2
68
MAX2267
OUTPUT POWER vs. INPUT POWER
MAX2267/9-06
INPUT POWER (dBm)
OUTPUT POWER (dBm)
PWR = V
CC
TA = -40°C
TA = +25°C
TA = +85°C
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC= +3.5V, SHDN = VCC, CDMA modulation, TA= +25°C, unless otherwise noted.)
8
12
16
20
24
-14 -8-12
-10
-6 -4 -2
MAX2267
OUTPUT POWER vs. INPUT POWER
MAX2267/9-07
INPUT POWER (dBm)
OUTPUT POWER (dBm)
TA = +25°C
TA = +85°C
TA = -40°C
PWR = GND
23
25
24
26
27
28
0155
10
20 25
30
35
MAX2267
GAIN vs. OUTPUT POWER
MAX2267/9-08
OUTPUT POWER (dBm)
GAIN (dB)
PWR = V
CC
TA = +25°C
TA = +85°C
TA = -40°C
21
22
24
23
25
26
-10 5-5
0
10 15 20
MAX2267
GAIN vs. OUTPUT POWER
MAX2267/9-09
OUTPUT POWER (dBm)
GAIN (dB)
PWR = GND
TA = -40°C
TA = +85°C
TA = +25°C
0
200
400
600
800
0155
10
20 25
30
35
MAX2267
SUPPLY CURRENT vs. OUTPUT POWER
MAX2267/9-10
OUTPUT POWER (dBm)
SUPPLY CURRENT (mA)
PWR = V
CC
PWR = GND
0
40
80
120
160
093
6
12 15 18
MAX2267
SUPPLY CURRENT vs. OUTPUT POWER
MAX2267/9-11
OUTPUT POWER (dBm)
SUPPLY CURRENT (mA)
TA = +85°C
TA = -40°C
TA = +25°C
-80
-70
-50
-60
-40
-30
51510 20 25 30
MAX2267
ADJACENT-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267/9-12
OUTPUT POWER (dBm)
ACPR (dBc)
PWR = V
CC
TA = +25°C
TA = +85°C
TA = -40°C
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
_______________________________________________________________________________________ 7
PWR = GND
-80
-70
-50
-60
-40
-30
-10 5-5
0
10 15 20
MAX2267
ADJACENT-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267/9-13
OUTPUT POWER (dBm)
ACPR (dBc)
TA = -40°C
TA = +85°C
TA = +25°C
-90
-70
-80
-60
-50
-40
51510 20 25 30
MAX2267
ALTERNATE-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267/9-14
OUTPUT POWER (dBm)
ACPR (dBc)
PWR = V
CC
TA = +85°C
TA = -40°C
TA = +25°C
-80
-70
-50
-60
-40
-30
880 900890 910 920 930
MAX2267
ADJACENT-CHANNEL POWER RATIO
vs. FREQUENCY
MAX2267/9-16
FREQUENCY (MHz)
ACPR (dBc)
PWR = V
CC
P
OUT
= +27dBm
TA = +25°C
TA = -40°C
TA = +85°C
-90
-80
-60
-70
-50
-40
880 900890 910 920 930
MAX2267
ALTERNATE-CHANNEL POWER RATIO
vs. FREQUENCY
MAX2267/9-17
FREQUENCY (MHz)
ACPR (dBc)
PWR = V
CC
P
OUT
= +27dBm
TA = +25°C
TA = -40°C
TA = +85°C
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC= +3.5V, SHDN = VCC, CDMA modulation, TA= +25°C, unless otherwise noted.)
PWR = V
CC
0
25
15
5
30
35
40
10
20
45
50
55
020
25
51015
30 35
MAX2267
POWER-ADDED EFFICIENCY
vs. OUTPUT POWER
OUTPUT POWER (dBm)
PAE (%)
MAX2267/9-18
V
CC
= 3.5V
V
CC
= 2.7V
0
5
10
15
20
-10 5-5
0
10 15 20
MAX2267
POWER-ADDED EFFICIENCY
vs. OUTPUT POWER
MAX2267/9-19
OUTPUT POWER (dBm)
PAE (%)
PWR = GND
TA = +25°C
TA = -40°C
TA = +85°C
24
26
30
28
32
34
890880 910900 920 930
MAX2267
POWER-ADDED EFFICIENCY
vs. FREQUENCY
MAX2267/9-20
FREQUENCY (MHz)
PAE (%)
PWR = V
CC
P
OUT
= +27dBm
TA = +25°C
TA = +85°C
TA = -40°C
PWR = GND
P
OUT
= +17dBm
5
15
10
20
890880 910900 920 930
MAX2267
POWER-ADDED EFFICIENCY
vs. FREQUENCY
MAX2267/9-21
FREQUENCY (MHz)
PAE (%)
TA = -40°C
TA = +25°C
TA = +85°C
PWR = GND
-5 50101520
MAX2267
ALTERNATE-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267/9-15
OUTPUT POWER (dBm)
-90
-70
-80
-60
-50
-40
ACPR (dBc)
TA = +85°C
TA = +25°C
TA = -40°C
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
8 _______________________________________________________________________________________
-80
-70
-50
-60
-40
-30
51510 20 25 30
MAX2268
ADJACENT-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267/9-28
OUTPUT POWER (dBm)
ACPR (dBc)
TA = +25°C
TA = +85°C
TA = -40°C
-90
-80
-60
-70
-50
-40
51510 20 25 30
MAX2268
ALTERNATE-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267/9-29
OUTPUT POWER (dBm)
ACPR (dBc)
TA = +85°C
TA = +25°C
TA = -40°C
-80
-70
-50
-60
-40
-30
880 900890 910 920 930
MAX2268
ADJACENT-CHANNEL POWER RATIO
vs. FREQUENCY
MAX2267/9-30
FREQUENCY (MHz)
ACPR (dBc)
TA = +25°C
TA = -40°C
TA = +85°C
0
20
40
60
80
100
120
140
2.5 3.53.0 4.0 4.5 5.0 5.5
MAX2268
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
MAX2267/9-22
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
TA = +85°C
TA = -40°C
TA = +25°C
20
22
26
24
28
30
2.5 3.53.0 4.0 4.5 5.0
MAX2268
GAIN vs. SUPPLY VOLTAGE
MAX2267/9-23
SUPPLY VOLTAGE (V)
GAIN (dB)
TA = -40°C
TA = +85°C
TA = +25°C
30
32
36
34
38
40
2.5 3.53.0 4.0 4.5 5.0
MAX2268
POWER-ADDED EFFICIENCY
vs. SUPPLY VOLTAGE
MAX2267/9-24
SUPPLY VOLTAGE (V)
PAE (%)
TA = +85°C
TA = -40°C
TA = +25°C
25
28
27
26
29
30
31
32
04
2
68
MAX2268
OUTPUT POWER vs. INPUT POWER
MAX2267/9-25
INPUT POWER (dBm)
OUTPUT POWER (dBm)
TA = -40°C
TA = +85°C
TA = +25°C
V
CC
= 3.5V
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC= +3.5V, SHDN = VCC, CDMA modulation, TA= +25°C, unless otherwise noted.)
23
25
24
26
27
28
0155
10
20 25
30
35
MAX2268
GAIN vs. OUTPUT POWER
MAX2267/9-26
OUTPUT POWER (dBm)
GAIN (dB)
TA = +85°C
TA = +25°C
TA = -40°C
V
CC
= 3.5V
0
200
400
600
800
0155
10
20 25
30
35
MAX2268
SUPPLY CURRENT vs. OUTPUT POWER
MAX2267/9-27
OUTPUT POWER (dBm)
SUPPLY CURRENT (mA)
USING OPTIONAL TB
CIRCUIT IN FIGURE 2
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
_______________________________________________________________________________________ 9
-90
-80
-60
-70
-50
-40
880 900890 910 920 930
MAX2268
ALTERNATE-CHANNEL POWER RATIO
vs. FREQUENCY
MAX2267/9-31
FREQUENCY (MHz)
ACPR (dBc)
TA = +25°C
TA = -40°C
TA = +85°C
0
25
15
5
30
35
40
10
20
45
50
55
020
25
51015
30 35
MAX2268
POWER-ADDED EFFICIENCY
vs. OUTPUT POWER
OUTPUT POWER (dBm)
PAE (%)
MAX2267/9-32
V
CC
= 3.5V
V
CC
= 2.7V
0
20
40
60
80
100
120
140
2.5 3.53.0 4.0 4.5 5.0 5.5
MAX2269
SHUTDOWN CURRENT vs. SUPPLY VOLTAGE
MAX2267/9-34
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (nA)
TA = +85°C
TA = -40°C
TA = +25°C
PWR = GND
SHDN = GND
NO INPUT DRIVE
20
22
26
24
28
30
2.5 3.53.0 4.0 4.5 5.0
MAX2269
GAIN vs. SUPPLY VOLTAGE
MAX2267/9-35
SUPPLY VOLTAGE (V)
GAIN (dB)
PWR = V
CC
TA = -40°C
TA = +85°C
TA = +25°C
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC= +3.5V, SHDN = VCC, CDMA modulation, TA= +25°C, unless otherwise noted.)
PWR = V
CC
TA = +25°C
TA = -40°C
TA = +85°C
24
26
30
28
32
34
2.5 3.53.0 4.0 4.5 5.0
MAX2269
POWER-ADDED EFFICIENCY
vs. SUPPLY VOLTAGE
MAX2267/9-37
SUPPLY VOLTAGE (V)
PAE (%)
20
22
26
24
28
30
2.5 4.03.0
3.5
4.5 5.0
MAX2269
GAIN vs. SUPPLY VOLTAGE
MAX2267/9-36
SUPPLY VOLTAGE (V)
GAIN (dB)
PWR = GND
TA = -40°C
TA = +85°C
TA = +25°C
TA = -40°C
TA = +85°C
TA = +25°C
13
14
16
15
18
17
19
2.5 4.03.0
3.5
4.5 5.0
MAX2269
POWER-ADDED EFFICIENCY
vs. SUPPLY VOLTAGE
MAX2267/9-38
SUPPLY VOLTAGE (V)
PAE (%)
PWR = GND
30
32
36
34
38
40
880 900890 910 920 930
MAX2268
POWER-ADDED EFFICIENCY
vs. FREQUENCY
MAX2267/9-33
FREQUENCY (MHz)
PAE (%)
TA = -40°C
TA = +85°C
TA = +25°C
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
10 ______________________________________________________________________________________
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC= +3.5V, SHDN = VCC, CDMA modulation, TA= +25°C, unless otherwise noted.)
8
12
16
20
24
-14 -8-12
-10
-6 -4 -2
MAX2269
OUTPUT POWER vs. INPUT POWER
MAX2267/9-40
INPUT POWER (dBm)
OUTPUT POWER (dBm)
PWR = GND
TA = +85°C
TA = -40°C
TA = +25°C
23
25
24
26
27
28
0155
10
20 25
30
35
MAX2269
GAIN vs. OUTPUT POWER
MAX2267/9-41
OUTPUT POWER (dBm)
GAIN (dB)
PWR = V
CC
TA = -40°C
TA = +85°C
TA = +25°C
24
25
27
26
28
29
-10 5-5
0
10 15 20
MAX2269
GAIN vs. OUTPUT POWER
MAX2267/9-42
OUTPUT POWER (dBm)
GAIN (dB)
PWR = GND
TA = -40°C
TA = +85°C
TA = +25°C
PWR = V
CC
0
200
400
600
800
0155
10
20 25
30
35
MAX2269
SUPPLY CURRENT vs. OUTPUT POWER
MAX2267/9-43
OUTPUT POWER (dBm)
SUPPLY CURRENT (mA)
PWR = GND
0
40
80
120
160
093
6
12 15 18
MAX2269
SUPPLY CURRENT vs. OUTPUT POWER
MAX2267/9-44
OUTPUT POWER (dBm)
SUPPLY CURRENT (mA)
TA = +25°C
TA = +85°C
TA = -40°C
-80
-70
-50
-60
-40
-30
51510 20 25 30
MAX2269
ADJACENT-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267/9-45
OUTPUT POWER (dBm)
ACPR (dBc)
PWR = V
CC
TA = +85°C
TA = -40°C
TA = +25°C
PWR = GND
-80
-70
-50
-60
-40
-30
-10 5-5
0
10 15 20
MAX2269
ADJACENT-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267/9-46
OUTPUT POWER (dBm)
ACPR (dBc)
TA = +85°C
TA = +25°C
TA = -40°C
-90
-80
-60
-70
-50
-40
51510 20 25 30
MAX2269
ALTERNATE-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267/9-47
OUTPUT POWER (dBm)
ACPR (dBc)
PWR = V
CC
TA = +85°C
TA = -40°C
TA = +25°C
25
28
27
26
29
30
31
32
04
2
68
MAX2269
OUTPUT POWER vs. INPUT POWER
MAX2267/9-39
INPUT POWER (dBm)
OUTPUT POWER (dBm)
PWR = V
CC
TA = -40°C
TA = +85°C
TA = +25°C
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
______________________________________________________________________________________ 11
-80
-70
-50
-60
-40
-30
880 900890 910 920 930
MAX2269
ADJACENT-CHANNEL POWER RATIO
vs. FREQUENCY
MAX2267/9-49
FREQUENCY (MHz)
ACPR (dBc)
PWR = V
CC
P
OUT
= +27dBm
TA = +85°C
TA = -40°C
TA = +25°C
-90
-80
-60
-70
-50
-40
880 900890 910 920 930
MAX2269
ALTERNATE-CHANNEL POWER RATIO
vs. FREQUENCY
MAX2267/9-50
FREQUENCY (MHz)
ACPR (dBc)
PWR = V
CC
P
OUT
= +27dBm
TA = +85°C
TA = -40°C
TA = +25°C
0
25
15
5
30
35
40
10
20
45
50
55
020
25
51015
30 35
MAX2269
POWER-ADDED EFFICIENCY
vs. OUTPUT POWER
OUTPUT POWER (dBm)
PAE (%)
MAX2267/9-51
PWR = V
CC
V
CC
= 3.5V
V
CC
= 2.7V
TA = -40°C
TA = +85°C
TA = +25°C
0
5
10
15
20
-10 5-5
0
10 15 20
MAX2269
POWER-ADDED EFFICIENCY
vs. OUTPUT POWER
MAX2267/9-52
OUTPUT POWER (dBm)
PAE (%)
PWR = GND
24
26
30
34
32
28
890880 910900 920 930
MAX2269
POWER-ADDED EFFICIENCY
vs. FREQUENCY
MAX2267/9-53
FREQUENCY (MHz)
PAE (%)
PWR = V
CC
P
OUT
= +27dBm
TA = +85°C
TA = -40°C
TA = +25°C
10
20
15
25
890880 910900 920 930
MAX2269
POWER-ADDED EFFICIENCY
vs. FREQUENCY
MAX2267/9-54
FREQUENCY (MHz)
PAE (%)
PWR = GND
P
OUT
= +17dBm
TA = +85°C
TA = -40°C
TA = +25°C
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC= +3.5V, SHDN = VCC, CDMA modulation, TA= +25°C, unless otherwise noted.)
PWR = GND
-90
-80
-60
-70
-50
-40
-5 50101520
MAX2269
ALTERNATE-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267/9-48
OUTPUT POWER (dBm)
ACPR (dBc)
TA = -40°C
TA = +85°C
TA = +25°C
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
12 ______________________________________________________________________________________
Detailed Description
The MAX2267/MAX2268/MAX2269 are linear power
amplifiers (PAs) intended for CDMA and TDMA applications. The devices have been fully characterized in the
887MHz to 925MHz Japanese cellular band and can be
used from 750MHz to 1000MHz by adjusting the input
and output match. In CDMA applications, they provide
+27dBm of output power and up to 35% power-added
efficiency (PAE) from a single +2.7V to +4.5V supply.
An inherent drawback of traditional PAs is that their efficiency drops rapidly with reduced output power. For
example, in a PA designed for maximum efficiency at
+27dBm, the efficiency at +15dBm falls well below
4.5% (over 200mA from a 3.5V supply). This behavior
significantly reduces talk time in CDMA phones
because over 90% of the time they are at output powers below +16dBm. The MAX2267/MAX2268/MAX2269
are optimized for lowest current draw at output powers
that are most likely to occur in real-life situations. This
provides up to 50% reduced average PA current.
High-Power and Low-Power Modes
The MAX2267/MAX2269 are designed to provide optimum PAE in both high- and low-power modes. For a
+3.5V supply, maximum output power is +27dBm in
high-power mode. In low-power mode, output power is
+17dBm and +17.5dBm, respectively. Use the system’s microcontroller to determine required output
power, and switch between the two modes as appropriate with the PWR logic pin.
Bias Control
The bias current of the first stage in low-power mode is
proportional to the current flowing out of BIAS1L. The
voltage at BIAS1L is fixed by an internal bandgap refer-
Pin Description
IN1 RF Input Port. Requires external matching network.11
IN0 RF Input Port. Requires external matching network.—16
BIAS1L
OUT0
NFP
GND
BIAS2H
BIAS1H
SHDN
BIAS2L
OUT1
V
CC
PWR
NAME
Low-Power Mode First Stage Bias Control. See General Description.—10
RF Output Port. Requires an appropriate output matching network and collector
bias.
—11
Noise Filtering Pin. Connect noise filtering network as described in
Noise Filtering section. If unused, leave open.
1212
Ground. Solder the package slug to high-thermal-conductivity circuit board
ground plane.
13, Slug13, Slug
High-Power Mode Second Stage Bias Control. See General Description.1515
High-Power Mode First Stage Bias Control. See General Description.44
Shutdown Control Input. Drive SHDN low to enable shutdown. Drive high for
normal operation. On the MAX2268, make sure that both pins get driven simultaneously. To place the MAX2267 into shutdown mode, also pull the PWR pin low.
2, 66
Low-Power Mode Second Stage Bias Control. See General Description.—7
RF Output Ports. Require an appropriate output matching network and collector
bias.
8, 98, 9
Voltage Supply. It is critical to bypass these pins with capacitors to GND as
close to the pins as possible.
3, 53, 5, 14
Mode-Select Input. Drive low to select the low-power mode (BIAS1L and
BIAS2L). Drive high to select high-power mode (BIAS1H and BIAS2H).
—2
PIN
MAX2268
MAX2267
MAX2269
FUNCTION
N.C. Not internally connected. Do not make any connections to these pins.
7, 10, 11, 14,
16
—
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
______________________________________________________________________________________ 13
ence, so the current out of this pin is inversely proportional to the value of the resistor between this pin and
ground. Similarly, the bias current of the first stage in
high-power mode is proportional to the current flowing
out of BIAS1H. The current in the second stage is proportional to the currents out of BIAS2L and BIAS2H for
low- and high-power modes, respectively.
Additionally, these resistors allow for customization of
gain and alternate- and adjacent-channel power ratios.
Increasing the bias current in the first stage increases the
gain and improves alternate-channel power ratio at the
expense of efficiency. Increasing the bias current in the
second stage increases gain at the expense of efficiency
as well as adjacent- and alternate-channel power ratios.
The PA bias current can be dynamically adjusted by
summing a current into the bias pin of interest with an
external source such as a DAC. See the MAX2268
Typical Application Circuit for using a voltage DAC and
current setting resistors RTB1 and RTB2. Choosing
RTB1 = R1 and RTB2 = R2 allows current adjustment
between 0mA to double the nominal idle current with
DAC voltages between 0V and 2.4V. The DAC must be
able to source approximately 100µA.
Shutdown Mode
Pull pins 2 and 6 low to place the MAX2267/MAX2268/
MAX2269 into shutdown mode. In this mode, all gain
stages are disabled and supply current drops to 0.5µA.
Applications Information
Increasing Efficiency
The MAX2269 incorporates an additional external
switch to increase efficiency to 17% at +17dBm and to
29% at +27dBm. This increase in efficiency is mainly
due to the additional isolation between the high- and
low-power outputs provided by the external switch.
External Components
The MAX2267/MAX2268/MAX2269 require matching
circuits at their inputs and outputs for operation in a
50Ω system. The simplified application circuits in
Figures 1, 2, and 3 describe the topology of the circuit-
Figure 1. MAX2267 Typical Application Circuit
RFIN
C2
L1
L3
C3
C11
C12
V
SHDN
CC
PWR
V
V
CC
CC
RH1
RL2
L4
C4
L2
C1
MAX2267
1
2
3
4
5
6
7
8
BIAS
16
15
14
13
12
11
10
9
C7
RH2
V
C13
RL1
C9
RFOUT
CC
OPTIONAL NOISE-REDUCTION CIRCUIT
L6
C6
L5
C8
V
CC
C5
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
14 ______________________________________________________________________________________
Figure 2. MAX2268 Typical Application Circuit
ry for each device. For more detailed circuit diagrams,
refer to the MAX2267/MAX2268/MAX2269 EV kit manual. The EV kit manual suggests component values that
are optimized for best simultaneous efficiency and
return loss performance. Use high-quality components
in these matching circuits for greatest efficiency.
Layout and Power-Supply Bypassing
A properly designed PC board is essential to any
RF/microwave circuit. Be sure to use controlled impedance lines on all high-frequency inputs and outputs.
Proper grounding of the GND pins is fundamental; if the
PC board uses a topside RF ground, connect all GND
pins (especially the TSSOP package exposed GND pad)
directly to it. On boards where the ground plane is not on
the component side, it’s best to connect all GND pins to
the ground plane with plated through-holes close to the
package.
To minimize coupling between different sections of the
system, the ideal power-supply layout is a star configuration with a large decoupling capacitor at a central
VCCnode. The VCCtraces branch out from this central
node, each leading to a separate VCCnode on the PC
board. A second bypass capacitor with low ESR at the
RF frequency of operation is located at the end of each
trace. This arrangement provides local decoupling at
the VCCpin.
Input and output impedance-matching networks are
very sensitive to layout-related parasitics. It is important
to keep all matching components as close to the IC as
possible to minimize the effects of stray inductance
and stray capacitance of PC board traces.
OPTIONAL TB CIRCUIT
TX
POWER
RTB2
RTB1
C3
C11
V
CC
R1
C12
V
V
SHDN
CC
CC
C4
RFIN
L1
C1
MAX2268
L3
1
2
3
4
5
6
7
8
L4
BIAS
16
15
14
13
12
11
10
9
C13
C9
R2
L7
OPTIONAL
NOISE-REDUCTION
CIRCUIT
L6
C6
C7
RFOUT
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
______________________________________________________________________________________ 15
Figure 3. MAX2269 Typical Application Circuit
Noise Filtering
For improved noise performance, the MAX2267/
MAX2268/MAX2269 allow for additional noise filtering
for further suppression of transmit noise. Use the rec-
ommended component values in the MAX2267/
MAX2268/MAX2269 EV kit manual for optimal noise
power.
RFIN
L1
L3
PWR
C3
C11
C12
V
SHDN
CC
V
CC
V
CC
RH1
RL2
L4
C4
L2
C1
1
2
3
4
5
6
7
8
C2
MAX2269
BIAS
16
15
14
13
12
11
10
9
RL1
RH2
C13
V
CC
L6
C6
OPTIONAL NOISEREDUCTION CIRCUIT
L5
C5
V
CC
R1
OPTIONAL
U1
UPG152TA
C7
C9
L7
RFOUT
N.C.
3
6
2
C8
4
5
PWR
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
16 ______________________________________________________________________________________
TRANSISTOR COUNT: 1256
Chip Information
Package Information
Pin Configurations/
Functional Diagrams (continued)
TOP VIEW
IN1 N.C.
1
SHDN
2
V
3
CC
BIAS1H
4
V
5
CC
SHDN
6
N.C.
7
OUT1
8
MAX2268
TSSOP-EP
BIAS
16
15
14
13
12
11
10
9
BIAS2H
N.C.
GND
NFP
N.C.
N.C.
OUT1
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