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.
Applications
Cellular-Band CDMA Phones
Cellular-Band PDC Phones
2-Way Pagers
Power-Amplifier Modules
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
M
+2.7V, Single-Supply, Cellular-Band
Linear Power Amplifiers
________________________________________________________________
Maxim Integrated Products
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.
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
B
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
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
-40°C to +85°C
MAX2268
EUE
MAX2269
EUE
MAX2267E/D
MAX2267
EUE
PART
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 (%)