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ATION
EVALU
AVAIL
19-5496; Rev 1; 2/11
KIT
ABLE
RMS Power Detector
General Description
The MAX2202 RMS power detector is designed to
operate from 800MHz to 2.0GHz. The device is ideal for
wideband code-division multiple access (WCDMA),
cdma2000 ? , and high-speed downlink/uplink packet
access. The device accepts an RF signal at the input
and outputs the same voltage regardless of the peak-
average of the input signal. The output voltage and
input power is linear in dB. The device has a
-29dBm to 0dBm detection range, and every dB
change in input power gives 33mV (typ) change in out-
put voltage.
The device operates from a 2.5V to 4.2V supply and is
specified over the -40°C to +85°C extended tempera-
Features
? -29dBm to 0dBm Power-Detection Range
? 33mV/dB (typ) Log Detector
? 0.1dB (typ) RMS Accuracy from WCDMA
Modulation Change
? ±0.4dB Detection Error Due to Temperature
? +2.5V to +4.2V Single-Supply Operation
? Space-Saving 6-Bump WLP Package
Ordering Information
ture range. The device is available in a 6-bump WLP
package.
Applications
PART
MAX2202EWT+T10
TEMP RANGE
-40 ° C to +85 ° C
PIN-
PACKAGE
6 WLP
TOP
MARK
AA
LTE, WCDMA, cdma2000, 1xEVDO
High-Speed Downlink Packet Access (HSDPA)
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
High-Speed Uplink Packet Access (HSUPA)
Typical Operating Circuit
TERMINATION RESISTOR NOT NEEDED
IF TWO OR MORE DIRECTIONAL COUPLERS
ARE USED AND CONFIGURED AS IN FIGURE 1.
A2
ENA
RF INPUT FROM
DIRECTIONAL
COUPLER
SMA
220pF
+
MAX2202
A1
RFIN/
GND
50 Ω
1%
24.3k Ω
ENABLE
LOGIC INPUT
B1
GND
B2
FILT
C1
0.1 μ F
MUST BE X5R
V CC
OR X7R TYPE
TEST POINT
TYPE
WCDMA
NCDMA
C1 (μF)
0.1
0.33
C2 (nF)
4.7
15
1 μ F
0.1 μ F
C1
V CC
C2
OUT
10k Ω
TO ADC
C2
4700pF
cdma2000 is a registered trademark of the Telecommunications Industry Association.
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
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