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MAX2245 Datasheet

22dBm/20dBm Power Amplifiers

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19-2204; Rev 2; 8/03
2.5GHz, 22dBm/20dBm Power Amplifiers with
Analog Closed-Loop Power Control
General Description
The MAX2244/MAX2245/MAX2246 single-supply, low-
voltage power amplifiers (PAs) are designed for 20dBm
Bluetooth™ Class 1 applications in the 2.4GHz to 2.5GHz
band. The MAX2244/MAX2245 deliver a peak output
power of 22dBm with greater than 20dB output-power
control range. The 22dBm output power compensates for
the filter loss between the PA and the antenna, allowing
20dBm to be delivered to the antenna. The MAX2246 pro-
vides a peak output power of 20dBm for a 30% reduction
in supply current.
The PAs integrate a power detector and closed-loop
power-control circuitry to provide nearly constant output
power over the full range of supply voltage, temperature,
and input power level. The voltage at the analog control
input precisely controls the output power level.
The MAX2244/MAX2245/MAX2246 feature a low-current
shutdown mode through a simple logic input. Internal cir-
cuitry automatically controls the ramp-up/down of the
output power level during turn-on and turn-off to meet
Bluetooth spurious emissions requirements.
The devices operate from a 3V to 3.6V single supply.
The MAX2244/MAX2246 have a power-control voltage
range of 0.5V to 2V, and the MAX2245 has a control
voltage range of 0.9V to 2.2V. The devices are pack-
aged in a miniature ultra chip-scale package (UCSP™),
significantly reducing the required board area.
Applications
Bluetooth Class 1 Radios
802.11 FHSS/HomeRF™ Radios
2.4GHz Cordless Phones
SHUTDOWN
BIAS
VCC1
C2
Features
o 2.4GHz to 2.5GHz Operation
o Accurate Closed-Loop Output Power Control
Over Full Temperature, Supply, and Input Power
Range
o Convenient Analog Power-Control Interface
o 22dBm Peak Output Power (MAX2244/MAX2245)
o 20dBm Peak Output with 30% Reduced Supply
Current (MAX2246)
o Internal Bandwidth-Limited Power Ramping
o 50Integrated Input Match
o 0.5µA Shutdown Supply Current
o Ultra Chip-Scale Package (1.56mm 1.56mm)
Ordering Information
PART
TEMP
RANGE
BUMP
PACKAGE
TOP
MARK
MAX2244EBL-T -40°C to +85°C 9 UCSP*-9
AAP
MAX2245EBL-T -40°C to +85°C 9 UCSP*-9
AAQ
MAX2246EBL-T -40°C to +85°C 9 UCSP*-9
AAY
*UCSP reliability is integrally linked to the user's assembly
methods, circuit board material, and environment. See the
UCSP Reliability Notice in the UCSP Reliability section of this
data sheet for more information.
Pin Configuration appears at end of data sheet.
Functional Diagram
VCC2
A2
RFIN/ B1
SHDN
MATCH
MATCH
MATCH
B3 RFOUT
MAX2244
MAX2245
MAX2246
CONTROL
AMP
POWER
DETECTOR
PC A1
ANALOG
INTERFACE
C3 C1
GND GND
B2
GND
A3
GND
Bluetooth is a trademark of Ericsson Corp.
UCSP is a trademark of Maxim Integrated Products, Inc.
HomeRF is a trademark of The HomeRF Working Group.
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX2245 Datasheet

22dBm/20dBm Power Amplifiers

No Preview Available !

2.5GHz, 22dBm/20dBm Power Amplifiers with
Analog Closed-Loop Power Control
ABSOLUTE MAXIMUM RATINGS
VCC1, VCC2, RFOUT to GND .................................-0.3V to +6.0V
RFIN/SHDN, PC to GND.............................-0.3V to (VCC + 0.3V)
RF Input Power (RFIN)....................................................+10dBm
Load Mismatch (VSWR) Without Damage ..............................6:1
Continuous Power Dissipation (TA = +85°C)
9-Pin UCSP (derate 8.8mW/°C above TA = +85°C).....700mW
Operating Temperature Range ...........................-40°C to +85°C
Junction Temperature .....................................................+150°C
Storage Temperature Range .............................-65°C to +150°C
Continuous Operating Lifetime............10 years x 0.935(TA - 65°C)
(for operating temperature 65°C < TA < 85°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.
CAUTION! ESD SENSITIVE DEVICE
DC ELECTRICAL CHARACTERISTICS
(Typical Application Circuit, VCC = 3V to 3.6V, no RF signals applied, VSHDN 2V, VPC = 0, TA = -40°C to +85°C, unless otherwise
noted. Typical values are at VCC = 3V, TA = +25°C, unless otherwise noted.) (Note 1)
PARAMETER
Supply Voltage
Supply Current (Note 2)
Shutdown Supply Current
SHDN Input Voltage High
SHDN Input Voltage Low
SHDN Input Current
PC Input Voltage Range
PC Input Current
CONDITIONS
MAX2244
PRFIN = 0 to 4dBm,
2.45GHz
VPC = 0.5V, TA = +25°C
VPC = 0.5V, TA = -40°C to +85°C
VPC = 2V, TA = +25°C
VPC = 2V, TA = -40°C to +85°C
MAX2245
PRFIN = 0 to 4dBm,
2.45GHz
VPC = 0.9V, TA = +25°C
VPC = 0.9V, TA = -40°C to +85°C
VPC = 2.2V, TA = +25°C
VPC = 2.2V, TA = -40°C to +85°C
VPC = 0.5V, TA = +25°C
MAX2246
PRFIN = 0 to 4dBm,
2.45GHz
VPC = 0.5V, TA = -40°C to +85°C
VPC = 2V, TA = +25°C
VPC = 2V, TA = -40°C to +85°C
SHDN = GND
Active control range
MAX2244/MAX2246
MAX2245
MAX2244/MAX2246, VPC = 0 to 2.5V
MAX2245, VPC = 0 to 3V
MIN TYP MAX UNITS
3.0 3.6 V
65 83
98
172 200
205
65 87
93
mA
179 195
208
42 55
61
118 140
144
0.5 10
µA
2.0 V
0.6 V
-1 1 µA
0.5 2.0
V
0.9 2.5
-15 5
µA
-20 10
2 _______________________________________________________________________________________


Part Number MAX2245
Description 22dBm/20dBm Power Amplifiers
Maker Maxim Integrated
Total Page 14 Pages
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