MAX2267 Datasheet, PDF (1/16 Pages) Maxim Integrated Products – +2.7V, Single-Supply, Cellular-Band Linear Power Amplifiers

19-1567; Rev 0; 1/00
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+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
V_CC 3
BIAS1H 4
V_CC 5
SHDN 6
BIAS2L 7
OUT1 8
16 IN0
15 BIAS2H
14 V_CC
13 GND
12 NFP
11 OUT0
10 BIAS1L
9 OUT1
TSSOP-EP
Pin Configurations continued at end of data sheet.
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