Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a
4-layer board. For detailed information on package thermal considerations, refer to
www.maxim-ic.com/thermal-tutorial.
Note 2:
For detailed information on soldering, refer to Application Note 1891:
Wafer-Level Packaging (WLP) and Its Applications.
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
(V
CC
= 2.7V to 5.0V, T
A
= -40NC to +85NC, no RF signal applied. Typical values are at V
CC
= 2.8V, T
A
= +25NC, unless otherwise
noted.) (Note 3)
PARAMETER
Supply Voltage
Supply Current
Idle Output Voltage
Output Current Source Capability
Output Current Sink Capability
V
CC
= 2.8V, no RF signal
P
IN
= 0dBm, V
OUT
forced to 0.5V
No RF signal, V
OUT
forced to 2V
750
300
CONDITIONS
MIN
2.7
3.6
35
1800
525
TYP
MAX
5.0
6
UNITS
V
mA
mV
FA
FA
AC ELECTRICAL CHARACTERISTICS
(T
A
= -40NC to +85NC, 50I system, V
CC
= 2.8V. Typical values are at T
A
= +25NC, unless otherwise noted.) (Note 3)
PARAMETER
RF Input Frequency
RF Input VSWR
Output Voltage, 836MHz
Output Voltage, 1950MHz
Residual Error after Room
Temperature Calibration
(T
A
= -40NC to +85NC) (Note 4)
800MHz
2000MHz
-5dBm input
-25dBm input
-5dBm input
-25dBm input
-5dBm input
-25dBm input
CONDITIONS
MIN
800
-17
-12
0.88
0.06
0.72
0.06
Q0.5
Q1.5
TYP
MAX
2000
UNITS
MHz
dB
V
V
dB
Note 3:
Guaranteed by production test at T
A
= +25NC. Guaranteed by design and characterization at T
A
= -40NC and
T
A
= +85NC.
Note 4:
Guaranteed by design and characterization. See the
Power Supply. Bypass to GND with a capacitor as close as possible to the bump.
Ground Connection. Connect to PCB ground plane with as low inductance as possible.
RF Input. Internally terminated to 50I. AC-couple the RF input to this pin.
FUNCTION
MAX2209
Detailed Description
The MAX2209 power detector is designed to oper-
ate from 800MHz to 2.0GHz. The device is ideal for
wideband code-division multiple access (WCDMA),
cdma2000
M
, and high-speed downlink/uplink packet
access. The MAX2209 accepts an RF signal at the input,
and outputs a temperature-independent voltage related
to the input signal voltage. The output voltage expressed
in dBV is proportional to the input power expressed in
dBm. The device has a detection range from -25dBm to
0dBm.
PA
DIRECTIONAL
COUPLER
TO
ANTENNA
MAX2209
V
CC
ADC
A1
OUT
A2
V
CC
Applications Information
The MAX2209 contains an internal termination resistor
for use with directional couplers. The typical application
circuit is shown in Figure 1. The output of the detector
goes to an ADC for further processing by the baseband
system. Connect a series resistor and shunt capacitor to
the MAX2209 output to reduce residual amplitude ripple.
B1
GND
B2
RFIN
RF INPUT
Layout
There are two areas that require attention: the GND pin
and the supply bypassing. Connect the GND pin to the
PCB ground with a GND via as close as possible, and
bypass V
CC
to ground with a capacitor as close as pos-
sible to the part.
Figure 1. Typical Application Circuit
Package Information
For the latest package outline information and land pat-
terns, go to
www.maxim-ic.com/packages.
Note that
a “+”, “#”, or “-” in the package code indicates RoHS
status only. Package drawings may show a different suf-
fix character, but the drawing pertains to the package
regardless of RoHS status.
PACKAGE TYPE
4 UCSP
PACKAGE CODE
B4+4
DOCUMENT NO.
21-0117
Chip Information
PROCESS: BIPOLAR
cdma2000 is a registered trademark of the Telecommunications
Industry Association.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied.
Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
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