MAX2268 Datasheet PDF - Maxim Integrated
| Part Number | MAX2268 | |
| Description | Cellular-Band Linear Power Amplifiers | |
| Manufacturers | Maxim Integrated | |
| Logo |  |
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19-1567; Rev 1; 2/01
EVAALVUAAILTAIOBNLEKIT
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
General Description
The MAX2267/MAX2268/MAX2269 power amplifiers are
optimized for IS-98-based CDMA and PDC cellular tele-
phones operating in the Japanese cellular-frequency
band. When matched for CDMA operation, the ampli-
fiers 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 refer-
enced bias ports that are normally terminated with sim-
ple 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 excel-
lent gain stability over temperature (±0.8dB), so over-
design 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.
Features
o Low Average CDMA Current Consumption in
Typical Urban Scenario
55mA (MAX2267)
90mA (MAX2268)
50mA (MAX2269)
o 0.5µA Shutdown Mode Eliminates External
Supply Switch
o ±0.8dB Gain Variation Over Temperature
o No External Reference or Logic Interface
Circuitry Needed
o Supply Current and ACPR Margin Dynamically
Adjustable
o +2.7V to +4.5V Single-Supply Operation
o 35% Efficiency at +2.7V Operation
Ordering Information
PART
TEMP. RANGE
PIN-
PACKAGE
MAX2267EUE
MAX2267E/D
MAX2268EUE
MAX2269EUE
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
16 TSSOP-EP
Dice*
16 TSSOP-EP
16 TSSOP-EP
TSSOP-EP
5mm x 6.4mm
*Contact factory for dice specifications.
Applications
Cellular-Band CDMA Phones
Cellular-Band PDC Phones
2-Way Pagers
Power-Amplifier Modules
DEVICE
MAX2267
MAX2268
MAX2269
Selector Guide
HIGH POWER-ADDED EFFICIENCY (%)
CDMA AT
+27dBm
CDMA AT
+17dBm
PDC AT
+29dBm
28 12 —
34 7 41
29 17 —
TOP VIEW
Pin Configurations/
Functional Diagrams
MAX2267/MAX2269
IN1 1
PWR 2
VCC 3
BIAS1H 4
VCC 5
SHDN 6
BIAS2L 7
OUT1 8
16 IN0
15 BIAS2H
14 VCC
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.
|
| |
 
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
AC ELECTRICAL CHARACTERISTICS—MAX2269 (continued)
(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
Power-Mode Switching Time
Turn-On Time (Notes 1, 4)
Maximum Input VSWR
Nonharmonic Spurious due to
Load Mismatch (Notes 1, 5)
Noise Power (Note 6)
Harmonic Suppression
SYMBOL
VSWR
CONDITIONS
(Note 4)
PWR = VCC or GND
fIN = 887MHz to 925MHz, PWR = GND or VCC
PIN = +6dBm
Measured at 851MHz
PWR = GND, measured at 851MHz
(Note 7)
MIN
TYP
550
1
2.4:1
-137
-130
32
MAX
5
UNITS
ns
µs
-60 dBc
dBm/Hz
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.)
MAX2267
SHUTDOWN CURRENT vs. SUPPLY VOLTAGE
140
PWR = GND
120 SHDN = GND
NO INPUT DRIVE
100
80 TA = +85°C
60
TA = +25°C
40
20
0
2.5
TA = -40°C
3.0 3.5 4.0 4.5 5.0
SUPPLY VOLTAGE (V)
5.5
MAX2267
GAIN vs. SUPPLY VOLTAGE
30
PWR = VCC
TA = -40°C
28
26
TA = +85°C
24 TA = +25°C
22
20
2.5
3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
5.0
MAX2267
GAIN vs. SUPPLY VOLTAGE
28
PWR = GND
TA = -40°C
26
TA = +25°C
24
22
TA = +85°C
20
18
2.5
3.0 3.5 4.0 4.5
SUPPLY VOLTAGE (V)
5.0
_______________________________________________________________________________________ 5
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| Information | Total 16 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ MAX2268.PDF Datasheet ] | |
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