MAXIM MAX2268

19-1567; Rev 1; 2/01
KIT
ATION
EVALU
E
L
B
A
AVAIL
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
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
Ordering Information
PART
TEMP. RANGE
PINPACKAGE
MAX2267EUE
-40°C to +85°C
16 TSSOP-EP
MAX2267E/D
MAX2268EUE
MAX2269EUE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
Dice*
16 TSSOP-EP
16 TSSOP-EP
*Contact factory for dice specifications.
Applications
Pin Configurations/
Functional Diagrams
Cellular-Band CDMA Phones
Cellular-Band PDC Phones
TOP VIEW
2-Way Pagers
MAX2267/MAX2269
Power-Amplifier Modules
IN1 1
Selector Guide
PWR 2
15 BIAS2H
VCC 3
14 VCC
BIAS1H 4
CDMA AT
+27dBm
CDMA AT
+17dBm
PDC AT
+29dBm
MAX2267
28
12
—
MAX2268
MAX2269
34
29
7
17
41
—
16 IN0
VCC 5
SHDN 6
BIAS2L 7
OUT1 8
BIAS
HIGH POWER-ADDED EFFICIENCY (%)
DEVICE
TSSOP-EP
5mm x 6.4mm
13 GND
12 NFP
11 OUT0
10 BIAS1L
9
OUT1
TSSOP-EP
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
For price, delivery, and to place orders, please contact Maxim Distribution at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
MAX2267/MAX2268/MAX2269
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.
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
ABSOLUTE MAXIMUM RATINGS
VCC to 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 (TPADDLE = +100°C)
16-Pin TSSOP-EP (derate 60mW/°C
above TPADDLE = +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
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
(VCC = +2.7V to +4.5V no input signal applied, V SHDN = 2.0V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC
= +3.5V and TA = +25°C.) (Note 8)
PARAMETER
SYMBOL
Operating Voltage Range
VCC
Idle Current
ICC
CONDITIONS
MIN
TYP
2.7
MAX2267/MAX2269
PWR = VCC
100
PWR = GND
34
MAX
UNITS
4.5
V
mA
90
MAX2268
SHDN = PWR = GND
10
µA
Logic Input Current High
Logic = VCC
-1
5
µA
Logic Input Current Low
Logic = GND
-1
1
µA
Shutdown Supply Current
ICC
0.5
2.0
Logic Threshold High
V
0.8
Logic Threshold Low
V
AC ELECTRICAL CHARACTERISTICS—MAX2267
(MAX2267 EV kit, VCC = VPWR = V SHDN = +3.5V, fIN = 906MHz, CDMA modulation, SHDN = VCC, matching networks tuned for
887MHz to 925MHz operation, 50Ω system, TA = +25°C, unless otherwise noted.)
PARAMETER
Frequency Range (Notes 1, 2)
Power Gain (Note 1)
SYMBOL
fIN
GP
CONDITIONS
PWR = VCC or GND
887
TA = +25°C
24.5
TA = TMIN to TMAX
PWR = GND
20.5
TA = TMIN to TMAX, relative to TA = +25°C
Output Power
(High-Power Mode) (Note 1)
ACPR specification
met with
fIN = 887MHz to
925MHz
PWR = VCC
ACPR specification
met with
fIN = 887MHz to
925MHz
Output Power
(Low-Power Mode) (Note 1)
2
POUT
TYP
MAX
UNITS
925
MHz
26
23
Gain Variation vs. Temperature
(Note 1)
POUT
MIN
dB
23
±0.8
dB
27
dBm
PWR = VCC = 2.8V
24.5
25.5
PWR = GND
16
17.5
PWR = GND,
VCC = 2.8V
14
15.5
_______________________________________________________________________________________
dBm
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
(MAX2267 EV kit, VCC = VPWR = V SHDN = +3.5V, fIN = 906MHz, CDMA modulation, SHDN = VCC, matching networks tuned for
887MHz to 925MHz operation, 50Ω system, TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
Adjacent-Channel Power Ratio
Limit (Notes 1, 2)
ACPR
Alternate-Channel Power Ratio
Limit (Notes 1, 2)
ACPR
CONDITIONS
MIN
TYP
VCC = 2.8V to 4.5V, offset = 885kHz,
30kHz BW, fIN = 887MHz to 925MHz
-44
-48
dBc
VCC = 2.8V to 4.5V, offset = 1980kHz,
30kHz BW, fIN = 887MHz to 925MHz
-56
-57.5
dBc
PWR = VCC, POUT = +27dBm
28
PWR = GND, POUT = 17.5dBm
12
Power-Mode Switching Time
(Note 4)
550
Turn-On Time (Notes 1, 4)
PWR = VCC or GND
Power-Added Efficiency
(Note 3)
Maximum Input VSWR
PAE
VSWR
Nonharmonic Spurious due
to Load Mismatch (Notes 1, 5)
1
fIN = 887MHz to 925MHz, PWR = GND or VCC
Harmonic Suppression
UNITS
%
ns
5
µs
-60
dBc
2.3:1
PIN = +6dBm
Noise Power (Note 6)
MAX
Measured at 851MHz
-137
PWR = GND, measured at 851MHz
-134
(Note 7)
dBm/Hz
32
dBc
AC ELECTRICAL CHARACTERISTICS—MAX2268
(MAX2268 EV kit, VCC = V SHDN = +3.5V, fIN = 906MHz, CDMA modulation, matching networks tuned for 887MHz to 925MHz operation, 50Ω system, TA = +25°C, unless otherwise noted.)
PARAMETER
Frequency Range (Notes 1, 2)
Power Gain (Note 1)
SYMBOL
CONDITIONS
GP
TA = +25°C
25.5
TA = TMIN to TMAX
TYP
MAX
UNITS
925
MHz
27
dB
24
Gain Variation vs. Temperature
(Note 1)
TA = TMIN to TMAX, relative to TA = +25°C
Output Power (Note 1)
ACPR specification
met with
fIN = 887MHz to
925MHz
POUT
MIN
887
fIN
±0.7
VCC = 3.5V
27
VCC = 2.8V
24.5
25.5
dB
dBm
Adjacent-Channel Power Ratio
(Notes 1, 2)
ACPR
VCC = 2.8V to 4.5V, offset = 885kHz,
30kHz BW, fIN = 887MHz to 925MHz
-44
-48
dBc
Alternate-Channel Power Ratio
(Notes 1, 2)
ACPR
VCC = 2.8V to 4.5V, offset = 1980kHz,
30kHz BW, fIN = 887MHz to 925MHz
-56
-57.5
dBc
Power-Added Efficiency
(Note 3)
PAE
PIN adjusted to give POUT = 27dBm
35
PIN adjusted for POUT = 13.6dBm
5.5
Turn-On Time (Notes 1, 4)
Maximum Input VSWR
1
VSWR
fIN = 887MHz to 925MHz
%
5
µs
1.5:1
_______________________________________________________________________________________
3
MAX2267/MAX2268/MAX2269
AC ELECTRICAL CHARACTERISTICS—MAX2267 (continued)
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
AC ELECTRICAL CHARACTERISTICS—MAX2268 (continued)
(MAX2268 EV kit, VCC = V SHDN = +3.5V, fIN = 906MHz, CDMA modulation, matching networks tuned for 887MHz to 925MHz operation, 50Ω system, TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
Nonharmonic Spurious Due
to Load Mismatch (Notes 1, 5)
PIN = +6dBm
Noise Power (Note 6)
Measured at 851MHz
Harmonic Suppression
(Note 7)
MIN
TYP
MAX
UNITS
-60
dBc
-138
dBm/Hz
47
dBc
AC ELECTRICAL CHARACTERISTICS—MAX2269
(MAX2269 EV kit, VCC = VPWR = V SHDN = +3.5V, fIN = 906MHz, CDMA modulation, SHDN = VCC, matching networks tuned for
887MHz to 925MHz operation, 50Ω system, TA = +25°C, unless otherwise noted.)
PARAMETER
Frequency Range (Notes 1, 2)
Power Gain (Note 1)
SYMBOL
fIN
GP
CONDITIONS
MIN
PWR = VCC or GND
887
TA = +25°C
24.5
TA = TMIN to TMAX
TYP
23.5
MHz
dB
26
Gain Variation vs. Temperature
(Note 1)
TA = TMIN to TMAX, relative to TA = +25°C
Output Power
(High-Power Mode) (Note 1)
ACPR specification
met with
fIN = 887MHz to
925MHz
PWR = VCC
PWR = VCC = 2.8V
24.5
25.5
PWR = GND
15.5
17
PWR = GND,
VCC = 2.8V
13.5
15
POUT
UNITS
925
26
23
PWR = GND
PWR = VCC
MAX
±0.8
dB
27
dBm
Output Power
(Low-Power Mode) (Note 1)
POUT
ACPR specification
met with
fIN = 887MHz to
925MHz
Adjacent-Channel Power Ratio
Limit (Notes 1, 2)
ACPR
VCC = 2.8V to 4.5V, offset = 885kHz,
30kHz BW, fIN = 887MHz to 925MHz
-44
-48
dBc
Alternate-Channel Power Ratio
Limit (Notes 1, 2)
ACPR
VCC = 2.8V to 4.5V, offset = 1980kHz,
30kHz BW, fIN = 887MHz to 925MHz
-56
-57.5
dBc
Power-Added Efficiency
(Note 3)
4
PAE
dBm
PWR = VCC, POUT = +27dBm
29
PWR = GND, POUT = 17dBm
17
_______________________________________________________________________________________
%
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
(MAX2269 EV kit, VCC = VPWR = V SHDN = +3.5V, fIN = 906MHz, CDMA modulation, SHDN = VCC, matching networks tuned for
887MHz to 925MHz operation, 50Ω system, TA = +25°C, unless otherwise noted.)
PARAMETER
SYMBOL
CONDITIONS
Power-Mode Switching Time
(Note 4)
Turn-On Time (Notes 1, 4)
PWR = VCC or GND
Maximum Input VSWR
VSWR
Nonharmonic Spurious due to
Load Mismatch (Notes 1, 5)
MIN
TYP
Harmonic Suppression
UNITS
5
µs
-60
dBc
ns
1
fIN = 887MHz to 925MHz, PWR = GND or VCC
2.4:1
PIN = +6dBm
Noise Power (Note 6)
MAX
550
Measured at 851MHz
-137
PWR = GND, measured at 851MHz
-130
(Note 7)
dBm/Hz
32
dBc
Note 1: Minimum and maximum values are guaranteed by design and characterization, not production tested.
Note 2: PMAX 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 POUT 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.
Note 8: ≥+25°C guaranteed by production test, ≤+25°C guaranteed through correlation to worst-case temperature testing.
Typical Operating Characteristics
(MAX2267/MAX2268/MAX2269 EV kits, VCC = +3.5V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.)
PWR = VCC
TA = -40°C
28
PWR = GND
TA = -40°C
26
TA = +25°C
100
60
26
24
TA = +25°C
TA = +25°C
40
GAIN (dB)
TA = +85°C
80
GAIN (dB)
SUPPLY CURRENT (nA)
28
MAX2267/9-02
PWR = GND
SHDN = GND
NO INPUT DRIVE
120
30
MAX2267/9-01
140
MAX2267
GAIN vs. SUPPLY VOLTAGE
MAX2267
GAIN vs. SUPPLY VOLTAGE
TA = +85°C
MAX2267/9-03
MAX2267
SHUTDOWN CURRENT vs. SUPPLY VOLTAGE
24
22
TA = +85°C
22
20
20
TA = -40°C
20
0
2.5
3.0
3.5
4.0
4.5
SUPPLY VOLTAGE (V)
5.0
5.5
18
2.5
3.0
3.5
4.0
SUPPLY VOLTAGE (V)
4.5
5.0
2.5
3.0
3.5
4.0
4.5
5.0
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
5
MAX2267/MAX2268/MAX2269
AC ELECTRICAL CHARACTERISTICS—MAX2269 (continued)
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC = +3.5V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.)
MAX2267
POWER-ADDED EFFICIENCY
vs. SUPPLY VOLTAGE
32
TA = -40°C
13
12
TA = -40°C
30
PAE (%)
11
TA = +25°C
TA = +85°C
28
10
TA = +85°C
26
TA = +25°C
3.5
4.0
4.5
TA = -40°C
29
TA = +85°C
28
TA = +25°C
27
25
2.5
5.0
3.5
3.0
4.0
4.5
5.0
2
0
4
6
8
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
INPUT POWER (dBm)
MAX2267
OUTPUT POWER vs. INPUT POWER
MAX2267
GAIN vs. OUTPUT POWER
MAX2267
GAIN vs. OUTPUT POWER
PWR = GND
PWR = VCC
TA = -40°C
27
TA = -40°C
20
26
MAX2267/9-08
28
MAX2267/9-07
24
3.0
30
26
8
2.5
PWR = VCC
31
9
24
PWR = GND
TA = -40°C
25
TA = +25°C
16
26
GAIN (dB)
TA = +25°C
GAIN (dB)
OUTPUT POWER (dBm)
32
MAX2267/9-09
PAE (%)
PWR = GND
OUTPUT POWER (dBm)
PWR = VCC
MAX2267/9-06
14
MAX2267/9-04
34
MAX2267
OUTPUT POWER vs. INPUT POWER
MAX2267/9-05
MAX2267
POWER-ADDED EFFICIENCY
vs. SUPPLY VOLTAGE
25
24
23
TA = +85°C
TA = +25°C
12
TA = +85°C
24
22
TA = +85°C
8
-12
-10
-8
-6
-4
-2
0
5
10
15
20
30
25
-10
35
0
-5
5
10
15
OUTPUT POWER (dBm)
OUTPUT POWER (dBm)
MAX2267
SUPPLY CURRENT vs. OUTPUT POWER
MAX2267
SUPPLY CURRENT vs. OUTPUT POWER
MAX2267
ADJACENT-CHANNEL POWER RATIO
vs. OUTPUT POWER
400
TA = +85°C
TA = +25°C
120
-30
80
TA = -40°C
PWR = VCC
-40
ACPR (dBc)
SUPPLY CURRENT (mA)
600
PWR = GND
MAX2267/9-11
160
MAX2267/9-10
PWR = VCC
20
MAX2267/9-12
INPUT POWER (dBm)
800
TA = +85°C
-50
TA = +25°C
-60
TA = -40°C
40
200
-70
0
0
0
5
10
15
20
25
OUTPUT POWER (dBm)
6
21
23
-14
SUPPLY CURRENT (mA)
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
30
35
-80
0
3
6
9
12
OUTPUT POWER (dBm)
15
18
5
10
15
20
OUTPUT POWER (dBm)
_______________________________________________________________________________________
25
30
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
TA = +25°C
PWR = VCC
TA = +85°C
-50
-40
PWR = GND
-50
TA = +85°C
-60
TA = -40°C
TA = -40°C
-70
0
-5
5
10
15
15
20
25
TA = -40°C
TA = +25°C
55
50
TA = +85°C
5
10
15
PWR = VCC
45
20
40
35
-60
TA = +25°C
PAE (%)
ACPR (dBc)
-50
PWR = VCC
POUT = +27dBm
-50
0
MAX2267
POWER-ADDED EFFICIENCY
vs. OUTPUT POWER
MAX2267/9-17
MAX2267
ALTERNATE-CHANNEL POWER RATIO
vs. FREQUENCY
TA = +85°C
-5
OUTPUT POWER (dBm)
MAX2267
ADJACENT-CHANNEL POWER RATIO
vs. FREQUENCY
-40
-70
30
OUTPUT POWER (dBm)
-40
-60
10
OUTPUT POWER (dBm)
PWR = VCC
POUT = +27dBm
TA = +25°C
-60
-90
5
20
MAX2267/9-16
-10
TA = -40°C
-80
-90
-80
ACPR (dBc)
-60
-80
-70
-30
ACPR (dBc)
ACPR (dBc)
ACPR (dBc)
TA = +25°C
-50
MAX2267/9-15
-40
-40
MAX2267/9-18
TA = +85°C
MAX2267/9-14
PWR = GND
MAX2267/9-13
-30
MAX2267
ALTERNATE-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267
ALTERNATE-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2267
ADJACENT-CHANNEL POWER RATIO
vs. OUTPUT POWER
TA = -40°C
VCC = 2.7V
30
25
-70
20
-70
-80
10
-80
-90
0
15
VCC = 3.5V
5
890
900
910
920
930
880
890
900
910
920
10
15
20
25
30
OUTPUT POWER (dBm)
MAX2267
POWER-ADDED EFFICIENCY
vs. OUTPUT POWER
MAX2267
POWER-ADDED EFFICIENCY
vs. FREQUENCY
MAX2267
POWER-ADDED EFFICIENCY
vs. FREQUENCY
TA = +25°C
34
PWR = VCC
POUT = +27dBm
32
15
20
MAX2267/9-20
PWR = GND
TA = -40°C
PWR = GND
POUT = +17dBm
TA = -40°C
10
PAE (%)
PAE (%)
15
TA = -40°C
30
28
TA = +25°C
10
5
TA = +25°C
26
35
MAX2267/9-21
FREQUENCY (MHz)
20
PAE (%)
5
0
930
FREQUENCY (MHz)
MAX2267/9-19
880
TA = +85°C
TA = +85°C
TA = +85°C
0
5
24
-10
-5
0
5
10
OUTPUT POWER (dBm)
15
20
880
890
900
910
FREQUENCY (MHz)
920
930
880
890
900
910
920
930
FREQUENCY (MHz)
_______________________________________________________________________________________
7
MAX2267/MAX2268/MAX2269
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC = +3.5V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC = +3.5V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.)
120
40
MAX2267/9-23
30
MAX2267/9-22
140
TA = -40°C
28
38
TA = -40°C
TA = +25°C
TA = +85°C
80
60
26
TA = +25°C
PAE (%)
100
GAIN (dB)
SUPPLY CURRENT (nA)
MAX2268
POWER-ADDED EFFICIENCY
vs. SUPPLY VOLTAGE
MAX2268
GAIN vs. SUPPLY VOLTAGE
MAX2267/9-24
MAX2268
SHUTDOWN CURRENT
vs. SUPPLY VOLTAGE
TA = +85°C
36
24
34
22
32
TA = +85°C
TA = +25°C
40
20
TA = -40°C
20
0
4.0
4.5
5.0
30
2.5
5.5
3.0
3.5
4.0
4.5
5.0
2.5
3.0
3.5
5.0
SUPPLY VOLTAGE (V)
MAX2268
OUTPUT POWER vs. INPUT POWER
MAX2268
GAIN vs. OUTPUT POWER
MAX2268
SUPPLY CURRENT vs. OUTPUT POWER
27
SUPPLY CURRENT (mA)
TA = -40°C
GAIN (dB)
29
TA = +25°C
28
26
TA = +85°C
TA = +25°C
25
TA = +85°C
27
800
TA = -40°C
MAX2267/9-27
28
600
400
200
24
26
USING OPTIONAL TB
CIRCUIT IN FIGURE 2
VCC = 3.5V
23
25
2
0
4
6
0
0
8
10
5
15
20
25
30
35
0
10
5
15
20
25
30
INPUT POWER (dBm)
OUTPUT POWER (dBm)
OUTPUT POWER (dBm)
MAX2268
ADJACENT-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2268
ALTERNATE-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2268
ADJACENT-CHANNEL POWER RATIO
vs. FREQUENCY
-50
-60
TA = +25°C
ACPR (dBc)
ACPR (dBc)
-50
-60
-70
TA = -40°C
TA = -40°C
TA = +25°C
-80
-70
10
15
20
OUTPUT POWER (dBm)
25
30
-50
TA = +25°C
-60
TA = -40°C
-70
-90
-80
TA = +85°C
-40
TA = +85°C
TA = +85°C
35
MAX2267/9-30
-40
-30
MAX2267/9-29
-40
MAX2267/9-28
-30
8
4.5
SUPPLY VOLTAGE (V)
30
5
4.0
SUPPLY VOLTAGE (V)
VCC = 3.5V
31
OUTPUT POWER (dBm)
3.5
MAX2267/9-26
32
3.0
MAX2267/9-25
2.5
ACPR (dBc)
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
-80
5
10
15
20
OUTPUT POWER (dBm)
25
30
880
890
900
910
FREQUENCY (MHz)
_______________________________________________________________________________________
920
930
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
45
TA = -40°C
PAE (%)
TA = +25°C
30
25
-70
36
15
TA = +85°C
TA = +25°C
34
20
-80
TA = -40°C
38
VCC = 2.7V
35
PAE (%)
ACPR (dBc)
40
-60
40
MAX2267/9-32
TA = +85°C
-50
55
50
MAX2267/9-31
-40
MAX2268
POWER-ADDED EFFICIENCY
vs. FREQUENCY
MAX2268
POWER-ADDED EFFICIENCY
vs. OUTPUT POWER
MAX2267/9-33
MAX2268
ALTERNATE-CHANNEL POWER RATIO
vs. FREQUENCY
VCC = 3.5V
32
10
5
-90
0
890
900
910
920
930
30
5
0
10
FREQUENCY (MHz)
15
25
20
30
35
30
910
PWR = VCC
TA = -40°C
28
920
930
100
TA = +85°C
80
GAIN (dB)
SUPPLY CURRENT (nA)
900
MAX2269
GAIN vs. SUPPLY VOLTAGE
MAX2267/9-34
PWR = GND
SHDN = GND
NO INPUT DRIVE
120
890
FREQUENCY (MHz)
MAX2269
SHUTDOWN CURRENT vs. SUPPLY VOLTAGE
140
880
OUTPUT POWER (dBm)
MAX2267/9-35
880
60
26
TA = +85°C
24
TA = +25°C
TA = +25°C
40
22
20
TA = -40°C
20
0
3.0
3.5
4.0
4.5
5.0
5.5
2.5
3.0
SUPPLY VOLTAGE (V)
TA = -40°C
28
4.5
5.0
MAX2269
POWER-ADDED EFFICIENCY
vs. SUPPLY VOLTAGE
19
MAX2267/9-37
34
MAX2267/9-36
PWR = GND
4.0
MAX2269
POWER-ADDED EFFICIENCY
vs. SUPPLY VOLTAGE
MAX2269
GAIN vs. SUPPLY VOLTAGE
30
3.5
SUPPLY VOLTAGE (V)
PWR = VCC
32
PWR = GND
TA = -40°C
18
MAX2267/9-38
2.5
TA = -40°C
30
PAE (%)
PAE (%)
GAIN (dB)
17
26
TA = +25°C
16
28
24
TA = +85°C
TA = +85°C
TA = +25°C
22
15
TA = +25°C
26
14
24
20
2.5
3.0
3.5
4.0
SUPPLY VOLTAGE (V)
4.5
5.0
TA = +85°C
13
2.5
3.0
3.5
4.0
SUPPLY VOLTAGE (V)
4.5
5.0
2.5
3.0
3.5
4.0
4.5
5.0
SUPPLY VOLTAGE (V)
_______________________________________________________________________________________
9
MAX2267/MAX2268/MAX2269
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC = +3.5V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.)
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC = +3.5V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.)
29
TA = +85°C
28
TA = +25°C
27
PWR = GND T = -40°C
A
28
TA = +85°C
16
PWR = VCC
27
20
GAIN (dB)
TA = -40°C
OUTPUT POWER (dBm)
OUTPUT POWER (dBm)
31
MAX2269
GAIN vs. OUTPUT POWER
MAX2267/9-40
PWR = VCC
30
24
MAX2267/9-39
32
MAX2269
OUTPUT POWER vs. INPUT POWER
TA = +25°C
MAX2267/9-41
MAX2269
OUTPUT POWER vs. INPUT POWER
TA = -40°C
TA = +25°C
26
25
TA = +85°C
12
24
26
25
8
2
0
4
8
23
-14
-10
-12
-8
-6
-4
-2
0
PWR = VCC
600
SUPPLY CURRENT (mA)
SUPPLY CURRENT (mA)
160
MAX2267/9-43
800
400
TA = +25°C
PWR = GND
120
TA = +85°C
TA = +25°C
80
40
TA = -40°C
TA = +85°C
0
0
5
10
15
0
20
5
10
15
20
25
30
0
35
6
3
9
12
15
OUTPUT POWER (dBm)
OUTPUT POWER (dBm)
OUTPUT POWER (dBm)
MAX2269
ADJACENT-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2269
ADJACENT-CHANNEL POWER RATIO
vs. OUTPUT POWER
MAX2269
ALTERNATE-CHANNEL POWER RATIO
vs. OUTPUT POWER
TA = +85°C
-40
TA = +25°C
-60
TA = -40°C
-70
TA = +25°C
TA = -40°C
15
20
OUTPUT POWER (dBm)
25
30
-60
-70
TA = -40°C
-90
-80
10
TA = +85°C
-50
-80
-70
-80
PWR = VCC
TA = +25°C
-50
-60
-40
ACPR (dBc)
ACPR (dBc)
TA = +85°C
-50
PWR = GND
MAX2267/9-46
-40
-30
MAX2267/9-45
PWR = VCC
18
MAX2267/9-47
0
24
-5
MAX2267/9-44
MAX2269
SUPPLY CURRENT vs. OUTPUT POWER
200
10
35
MAX2269
SUPPLY CURRENT vs. OUTPUT POWER
26
5
30
25
MAX2269
GAIN vs. OUTPUT POWER
27
-30
20
OUTPUT POWER (dBm)
TA = -40°C
-10
15
INPUT POWER (dBm)
PWR = GND
25
10
5
INPUT POWER (dBm)
28
GAIN (dB)
6
MAX2267/9-42
29
ACPR (dBc)
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
-10
-5
0
5
10
OUTPUT POWER (dBm)
15
20
5
10
15
20
OUTPUT POWER (dBm)
______________________________________________________________________________________
25
30
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
-70
-60
TA = +25°C
-80
TA = -40°C
0
5
10
15
20
880
890
OUTPUT POWER (dBm)
900
910
920
880
930
890
TA = -40°C
45
910
920
930
MAX2269
POWER-ADDED EFFICIENCY
vs. OUTPUT POWER
20
MAX2267/9-51
PWR = VCC
900
FREQUENCY (MHz)
FREQUENCY (MHz)
MAX2269
POWER-ADDED EFFICIENCY
vs. OUTPUT POWER
55
50
TA = +25°C
-70
-90
-80
PWR = GND
TA = -40°C
TA = +25°C
15
40
PAE (%)
PAE (%)
35
30
VCC = 2.7V
25
10
20
TA = +85°C
15
5
VCC = 3.5V
10
5
0
0
5
10
15
25
20
30
-10
35
0
-5
5
10
15
OUTPUT POWER (dBm)
OUTPUT POWER (dBm)
MAX2269
POWER-ADDED EFFICIENCY
vs. FREQUENCY
MAX2269
POWER-ADDED EFFICIENCY
vs. FREQUENCY
25
MAX2267/9-53
34
PWR = VCC
POUT = +27dBm
32
TA = -40°C
PWR = GND
POUT = +17dBm
TA = -40°C
20
PAE (%)
30
20
MAX2267/9-54
0
PAE (%)
-5
-60
-80
-70
-90
TA = +85°C
-50
-50
TA = +25°C
PWR = VCC
POUT = +27dBm
MAX2267/9-52
ACPR (dBc)
TA = -40°C
-40
ACPR (dBc)
TA = +85°C
-40
TA = +85°C
-60
PWR = VCC
POUT = +27dBm
MAX2267/9-49
PWR = GND
-50
ACPR (dBc)
-30
MAX2267/9-48
-40
MAX2269
ALTERNATE-CHANNEL POWER RATIO
vs. FREQUENCY
MAX2269
ADJACENT-CHANNEL POWER RATIO
vs. FREQUENCY
MAX2267/9-50
MAX2269
ALTERNATE-CHANNEL POWER RATIO
vs. OUTPUT POWER
28
TA = +25°C
TA = +85°C
15
TA = +25°C
TA = +85°C
26
10
24
880
890
900
910
FREQUENCY (MHz)
920
930
880
890
900
910
920
930
FREQUENCY (MHz)
______________________________________________________________________________________
11
MAX2267/MAX2268/MAX2269
Typical Operating Characteristics (continued)
(MAX2267/MAX2268/MAX2269 EV kits, VCC = +3.5V, SHDN = VCC, CDMA modulation, TA = +25°C, unless otherwise noted.)
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
MAX2267/MAX2268/MAX2269
Pin Description
PIN
NAME
FUNCTION
MAX2267
MAX2269
MAX2268
1
1
IN1
2
—
PWR
Mode-Select Input. Drive low to select the low-power mode (BIAS1L and
BIAS2L). Drive high to select high-power mode (BIAS1H and BIAS2H).
3, 5, 14
3, 5
VCC
Voltage Supply. It is critical to bypass these pins with capacitors to GND as
close to the pins as possible.
4
4
BIAS1H
6
2, 6
SHDN
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.
7
—
BIAS2L
Low-Power Mode Second Stage Bias Control. See General Description.
8, 9
8, 9
OUT1
10
—
BIAS1L
11
—
OUT0
12
12
NFP
Noise Filtering Pin. Connect noise filtering network as described in
Noise Filtering section. If unused, leave open.
—
7, 10, 11, 14,
16
N.C.
Not internally connected. Do not make any connections to these pins.
13, Slug
13, Slug
GND
Ground. Solder the package slug to high-thermal-conductivity circuit board
ground plane.
15
15
BIAS2H
16
—
IN0
RF Input Port. Requires external matching network.
High-Power Mode First Stage Bias Control. See General Description.
RF Output Ports. Require an appropriate output matching network and collector
bias.
Low-Power Mode First Stage Bias Control. See General Description.
RF Output Port. Requires an appropriate output matching network and collector
bias.
High-Power Mode Second Stage Bias Control. See General Description.
RF Input Port. Requires external matching network.
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
12
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-
______________________________________________________________________________________
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
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-
RFIN
C2
L2
L1
C1
MAX2267
L3
C3
PWR
C11
VCC
C12 VCC
SHDN
RL2
16
2
15
3
14
4
BIAS
RH1
1
13
5
12
6
11
7
10
8
9
VCC
RH2
VCC
C13
OPTIONAL NOISE-REDUCTION CIRCUIT
L6
C6
L5
RL1
L4
VCC
C5
C8
C9
C4
C7
RFOUT
Figure 1. MAX2267 Typical Application Circuit
______________________________________________________________________________________
13
MAX2267/MAX2268/MAX2269
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.
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
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
VCC node. The VCC traces branch out from this central
node, each leading to a separate VCC node 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 VCC pin.
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.
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.
RFIN
OPTIONAL TB CIRCUIT
TX
POWER
L1
RTB2
C1
RTB1
MAX2268
L3
C3
C11
VCC
16
2
15
3
14
4
13
BIAS
R1
1
C12 VCC
5
SHDN
6
11
7
10
8
9
R2
12
C13
L7 OPTIONAL
NOISE-REDUCTION
CIRCUIT
VCC
L4
C9
C4
L6
C7
RFOUT
C6
Figure 2. MAX2268 Typical Application Circuit
14
______________________________________________________________________________________
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
RFIN
C2
L1
C1
L2
MAX2269
L3
C3
PWR
C11
VCC
16
2
15
3
14
4
BIAS
RH1
1
VCC
C13
13
C12 VCC
5
12
SHDN
6
11
7
10
8
9
RL2
RH2
L6
C6
OPTIONAL NOISEREDUCTION CIRCUIT
RL1
L5
VCC
VCC
C5
L4
C4
U1
UPG152TA
3
6
N.C.
C7
PWR
2
4
5
C9
C8
L7
R1
OPTIONAL
RFOUT
Figure 3. MAX2269 Typical Application Circuit
______________________________________________________________________________________
15
MAX2267/MAX2268/MAX2269
ommended component values in the MAX2267/
MAX2268/MAX2269 EV kit manual for optimal noise
power.
Noise Filtering
For improved noise performance, the MAX2267/
MAX2268/MAX2269 allow for additional noise filtering
for further suppression of transmit noise. Use the rec-
Pin Configurations/
Functional Diagrams (continued)
Chip Information
TRANSISTOR COUNT: 1256
TOP VIEW
MAX2268
IN1 1
16 N.C.
SHDN
2
15 BIAS2H
VCC
3
14 N.C.
BIAS1H
4
VCC
5
12 NFP
SHDN 6
11 N.C.
BIAS
13 GND
N.C.
7
10 N.C.
OUT1
8
9 OUT1
TSSOP-EP
Package Information
TSSOP.EPS
MAX2267/MAX2268/MAX2269
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
16 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2001 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.