19-1567; Rev 1; 2/01
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
General Description
Features
ꢀ Low Average CDMA Current Consumption in
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.
Typical Urban Scenario
55mA (MAX2267)
90mA (MAX2268)
50mA (MAX2269)
ꢀ 0.5µA Shutdown Mode Eliminates External
Supply Switch
ꢀ
0.8dꢀ ꢁain ꢂariation ꢃver Temperature
ꢀ No External Reference or Logic Interface
Circuitry Needed
ꢀ Supply Current and ACPR Margin Dynamically
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 (±±.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.
Adjustable
ꢀ +2.7ꢂ to +4.5ꢂ Single-Supply ꢃperation
ꢀ 35% Efficiency at +2.7ꢂ ꢃperation
Ordering Information
PIN-
PACKAꢁE
PART
TEMP. RANꢁE
MAX2267EUE -4±°C to +85°C 16 TSSOP-EP
MAX2267E/D -4±°C to +85°C Dice*
TSSOP-EP
5mm x 6.4mm
MAX2268EUE -4±°C to +85°C 16 TSSOP-EP
MAX2269EUE -4±°C to +85°C 16 TSSOP-EP
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.
*Contact factory for dice specifications.
Applications
Pin Configurations/
Functional Diagrams
Cellular-Band CDMA Phones
Cellular-Band PDC Phones
2-Way Pagers
TOP VIEW
MAX2267/MAX2269
Power-Amplifier Modules
IN1
1
2
3
4
5
6
7
8
16 IN0
PWR
15 BIAS2H
Selector Guide
HIꢁH PꢃWER-ADDED EFFICIENCY (%)
V
14 V
CC
CC
BIAS1H
13 GND
12 NFP
DEꢂICE
CDMA AT
+27dꢀm
CDMA AT
+17dꢀm
PDC AT
+29dꢀm
V
CC
SHDN
BIAS2L
OUT1
11 OUT0
10 BIAS1L
MAX2267
MAX2268
MAX2269
28
34
29
12
7
—
41
—
9
OUT1
17
TSSꢃP-EP
Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
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