MAX2202EWT+T - Maxim Integrated - Datasheet.Directory

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-

ture range. The device is available in a 6-bump WLP

package.

Applications

LTE, WCDMA, cdma2000, 1xEVDO

High-Speed Downlink Packet Access (HSDPA)

High-Speed Uplink Packet Access (HSUPA)

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

MAX2202

RMS Power Detector

________________________________________________________________

Maxim Integrated Products

Ordering Information

19-5496; Rev 1; 2/11

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.

EVALUATION KIT

AVAILABLE

PART

TEMP RANGE

PIN-

PACKAGE

TOP

MARK

MAX2202EWT+T10 -40°C to +85°C

6 WLP AA

Denotes a lead(Pb)-free/RoHS-compliant package.

T = Tape and reel.

cdma2000 is a registered trademark of the Telecommunications Industry Association.

VCC

RFIN/

ENA

RF INPUT FROM

DIRECTIONAL

COUPLER

ENABLE

LOGIC INPUT

GND

OUT TO ADC

TEST POINT

4700pF

220pF

SMA

0.1μF

MUST BE X5R

OR X7R TYPE

10kΩ

24.3kΩ

50Ω

FILT

GND

TERMINATION RESISTOR NOT NEEDED

IF TWO OR MORE DIRECTIONAL COUPLERS

ARE USED AND CONFIGURED AS IN FIGURE 1.

0.1μF

MAX2202

1μF

Typical Operating Circuit

TYPE C1 (μF) C2 (nF)

WCDMA 0.1 4.7

NCDMA 0.33 15

MAX2202

RMS Power Detector

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

PACKAGE THERMAL CHARACTERISTICS (NOTES 2)

DC ELECTRICAL CHARACTERISTICS

(VCC = 2.5V to 4.2V, TA= -40°C to +85°C, VENA = 2.7V, no RF signal applied. Typical values are at VCC = 2.8V, TA= +25°C, unless

otherwise noted.) (Note 3)

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.

Note 3: Guaranteed by production test at TA= +85°C and 800MHz. Guaranteed by design and characterization at TA= -40°C and

TA= +25°C, and over frequency limits.

Note 4: Guaranteed by design and characterization.

Note 5: Log conformance is defined with respect to 4 calibration points, -1dBm, -7dBm, -19dBm, and -29dBm, at TA= +25°C.

VCC to GND...........................................................-0.3V to +4.5V

ENA, OUT, FILT to GND ........................................-0.3V to +3.0V

RFIN Input Power ...........................................................+10dBm

Continuous Power Dissipation (TA= +70°C)

6-Bump WLP (derate 2.9mW/°C above +70°C)...........232mW

Operating Temperature Range ...........................-40°C to +85°C

Storage Temperature Range .............................-65°C to +160°C

Junction Temperature .....................................................+150°C

Soldering Temperature (reflow, Note 1)...........................+260°C

6 WLP

Junction-to-Ambient Thermal Resistance (θJA) ...........95°C/W

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

Supply Voltage VCC 2.5 2.8 4.2 V

Supply Current ICC VCC = 2.8V, RF input = -29dBm to 0dBm 5.5 8.5 mA

Shutdown Supply Current VENA = 0V 0.5 10 µA

ENA Logic-High Threshold VIH 1.1 2.7 V

ENA Logic-Low Threshold VIL 0 0.6 V

ENA Input Current VENA = 1.1V or 0.6V 25 µA

AC ELECTRICAL CHARACTERISTICS

(VCC = 2.8V, TA= -40°C to +85°C, VENA = 2.7V, fRF = 800MHz to 2GHz, unless otherwise noted. Typical values are at TA= +25°C.)

(Note 3)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS

RF Input Frequency 800 2000 MHz

Maximum Output Voltage RFIN at 0dBm 1.05 1.31.5V

Minimum Output Voltage No RF input power, VENA = 2.7V 250 450 mV

Minimum Input Power Level +1dB input power step results in VOUT

increase > 23mV/dB (Note 4) -29 dBm

Log Slope [(VOUT at -1dBm) - (VOUT at -29dBm)]/28 23 33 43 mV/dB

Log Conformance Error with

10dB Step (Notes 4, 5) -1.0+1.0dB

Power-Detector Accuracy Due to

Temperature

RF input at -4dBm to -1dBm, TA = -20°C to

+25°C, and TA = +25°C to +85°C±0.4dB

Note 1: Refer to Application Note 1891:

Wafer-level packaging (WLP) and its applications

Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-

layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.

CAUTION! ESD SENSITIVE DEVICE

MAX2202

RMS Power Detector

_______________________________________________________________________________________

OUTPUT VOLTAGE vs. INPUT POWER

MAX2202 toc01

INPUT POWER (dBm)

OUTPUT VOLTAGE (V)

50-10 -5-25 -20 -15-30

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

-35 10

2GHz

800MHz

PCS WCDMA 1+1 vs. 1+5 RMS ERROR

(± DEVIATION FROM MIDPOINT)

MAX2202 toc02

INPUT POWER (dBm)

RMS ERROR (dB)

0-5-25 -20 -15 -10

-0.05

0.05

0.10

0.15

0.20

0.25

0.30

-0.10

-30 5

TA = +85°C

TA = -20°C

TA = +25°C

CELL WCDMA 1 + 1 vs. 1 + 5 RMS ERROR

(± DEVIATION FROM MIDPOINT)

MAX2202 toc03

INPUT POWER (dBm)

RMS ERROR (dB)

0-5-25 -20 -15 -10

-0.05

0.05

0.10

0.15

0.20

0.25

0.30

-0.10

-30 5

TA = +85°C

TA = -20°C

TA = +25°C

LOG CONFORMANCE WITH 1dB STEP

CELLULAR BAND

MAX2202 toc04

INPUT POWER (dBm)

LOG CONFORMANCE (dB)

-4-7-13 -10-22 -19 -16-25

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

0.4

0.5

-0.5

-28 -1

MEAN - 3s

MEAN + 3s

MEAN

LOG CONFORMANCE WITH 1dB STEP

PCS BAND

MAX2202 toc05

INPUT POWER (dBm)

LOG CONFORMANCE (dB)

-4-7-13 -10-22 -19 -16-25

-0.4

-0.3

-0.2

-0.1

0.1

0.2

0.3

0.4

0.5

-0.5

-28 -1

MEAN - 3s

MEAN

MEAN + 3s

LOG CONFORMANCE WITH 10dB STEP

CELLULAR BAND

MAX2202 toc06

INPUT POWER (dBm)

LOG CONFORMANCE (dB)

-4-7-16 -13 -10

-0.8

-0.6

-0.4

-0.2

0.4

0.6

0.2

0.8

1.0

-1.0

-19 -1

MEAN

MEAN - 3s

4 CALIBRATION POINTS

-29dBm, -19dBm, -7dBm, -1dBm

MEAN + 3s

LOG CONFORMANCE WITH 10dB STEP

PCS BAND

MAX2202 toc07

INPUT POWER (dBm)

LOG CONFORMANCE (dB)

-4-7-16 -13 -10-19 -1

-0.8

-0.6

-0.4

-0.2

0.4

0.6

0.2

0.8

1.0

-1.0

4 CALIBRATION POINTS

-29dBm, -19dBm, -7dBm, -1dBm

MEAN

MEAN - 3s

MEAN + 3s

47-UNIT CELLULAR ROOM-COLD

TEMPERATURE ERROR

MAX2202 toc08

INPUT POWER (dBm)

TEMPERATURE ERROR (dB)

0-5-10-15-20-25

-1.0

-0.5

0.5

1.0

1.5

-1.5

-30 5

Typical Operating Characteristics

(VCC = 2.7V, TA= +25°C, WCDMA uplink DPCCH + 1DPDCH, log conformance calculation is referenced to a straight line that is

calibrated at -20dBm and 0dBm, unless otherwise noted.)

MAX2202

RMS Power Detector

4 _______________________________________________________________________________________

Typical Operating Characteristics (continued)

(VCC = 2.7V, TA= +25°C, WCDMA uplink DPCCH + 1DPDCH, log conformance calculation is referenced to a straight line that is

calibrated at -20dBm and 0dBm, unless otherwise noted.)

47-UNIT PCS ROOM-COLD

TEMPERATURE ERROR

MAX2202 toc09

INPUT POWER (dBm)

TEMPERATURE ERROR (dB)

0-5-10-15-20-25

-1.0

-0.5

0.5

1.0

1.5

-1.5

-30 5

47-UNIT CELLULAR ROOM-HOT

TEMPERATURE ERROR

MAX2202 toc10

INPUT POWER (dBm)

TEMPERATURE ERROR (dB)

0-5-10-15-20-25

-1.0

-0.5

0.5

1.0

1.5

-1.5

-30 5

47-UNIT PCS ROOM-HOT

TEMPERATURE ERROR

MAX2202 toc11

INPUT POWER (dBm)

TEMPERATURE ERROR (dB)

0-5-10-15-20-25

-1.0

-0.5

0.5

1.0

1.5

-1.5

-30 5

TURN-ON TIME

MAX2202 toc14

0.5V/div

50mV/div

40µs/div

INPUT POWER = -25dBm, 800MHz

TURN-ON TIME

MAX2202 toc15

0.5V/div

50mV/div

40µs/div

INPUT POWER = -25dBm, 2000MHz

TURN-ON TIME

MAX2202 toc12

0.5V/div

0.2V/div

40µs/div

INPUT POWER = 0dBm, 800MHz

TURN-ON TIME

MAX2202 toc13

0.5V/div

0.2V/div

40µs/div

INPUT POWER = 0dBm, 2000MHz

RFIN S11

MAX2202 toc16

FREQUENCY (MHz)

S11 (dB)

PHASE (DEGREES)

24002100600 900 1200 1500 1800

-16

-14

-12

-10

-8

-6

-4

-2

-18

-150

-100

-50

100

150

200

-200

300 2700

INPUT SHUNT

R = 49.9I

INPUT SERIES

C = 220pF

S11

PHASE

Detailed Description

The MAX2202 RMS power detector is designed to

operate from 800MHz to 2.0GHz. The device is ideal for

LTE, 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 volt-

age 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. Table 1 shows the peak to average of the

signals used to test the device.

MAX2202

RMS Power Detector

_______________________________________________________________________________________ 5

Bump Description

BUMP NAME FUNCTION

A1 RFIN/ENA

RF Input and Enable Logic Input. See the Typical Operating Circuit. Drive ENA high to turn on the

device. Drive ENA low to place it in shutdown mode.

A2, B1 GND Ground. Connect to PCB ground plane.

B2 FILT Intermediate Filtering Node. Bypass FILT with a capacitor as close as possible to the device.

C1 VCC Power Supply. Connect to either a regulated supply or battery. Bypass VCC with a capacitor as close

as possible to the device.

C2 OUT Detector Output. Connect an external lowpass RC filter for filtering.

PAR AT DIFFERENT PROBABILITY OF COMPLEMENTARY CUMULATIVE

DISTRIBUTION (dB)

MODULATION

10% 1% 0.1% 0.01%

DPCCH + 1DPDCH 4.8 5.8 6.2 6.5

DPCCH + 5DPDCH 6.5 8.4 9.2 9.8

IS95 Reverse 5.5 6.9 7.6 8.1

IS95 Forward Pilot 5.6 7.6 8.8 9.5

9-Channel Forward 7 10.3 12 12.7

cdma2000 Pilot + DCCH 6.8 8.3 9.2 9.7

Table 1. Peak-to-Average Ratio (PAR*) of Test Signals

PAR of CW is 3dB.

VCC

RFIN/ENA

GND

OUT

FILT

GND

TOP VIEW

(BUMPS ON BOTTOM)

MAX2202

Bump Configuration

MAX2202

Applications Information

Detector RF Input

The MAX2202 generally requires a terminating resistor

and series capacitor between the directional coupler’s

output and detector RF input. As shown in the

Typical

Operating Characteristics

, an S11 of less than -9dB is

possible when a terminating resistor of 50Ωand series

capacitor of 220pF are used at the input. S11 of the

MAX2202 RFIN port without input matching is shown in

Table 2 and can be downloaded from Maxim’s website.

In cases where the detector is connected to two or

more directional couplers, as shown in Figure 1, the

50Ωterminating resistor can be eliminated.

Detector Voltage Output

The output of the MAX2202 goes to an ADC for further

processing by the baseband system. Connect a series

10kΩresistor and a shunt capacitor to the detector out-

put to reduce residual amplitude ripple. The shunt

capacitor should be 4.7nF for WCDMA and 15nF for

NCDMA.

Enable Logic Level

The device features an enable input (ENA) that allows

the device to be put into shutdown. For normal opera-

tion, drive ENA high. For device shutdown, drive ENA

low. The ENA pin is DC biased through a resistor. The

value of the resistor is recommended to be greater than

RMS Power Detector

6 _______________________________________________________________________________________

PA 1

PA 2

COUPLER 1

COUPLER 2

10Ω

50Ω

ENABLE

RMS

DETECT BUFFER

BIAS

DETECTOR

OUTPUT

MAX2202

Figure 1. System Level Connection

FREQ

(MHz)

S11

(dB)

S11

(PHASE)

FREQ

(MHz)

S11

(dB)

S11

(PHASE)

300 -1.63 -34.1 1560 -1.37 -156.4

360 -1.69 -39.6 1620 -1.35 -162.4

420 -1.75 -44.9 1680 -1.35 -168.0

480 -1.77 -50.2 1740 -1.35 -173.7

540 -1.77 -55.9 1800 -1.36 -179.2

600 -1.75 -61.4 1860 -1.36 175.3

660 -1.74 -66.9 1920 -1.41 170.0

720 -1.72 -72.6 1980 -1.35 164.8

780 -1.70 -78.6 2040 -1.37 159.6

840 -1.62 -84.2 2100 -1.34 154.5

900 -1.59 -90.2 2160 -1.36 149.2

960 -1.53 -96.2 2220 -1.37 144.2

1020 -1.52 -102.2 2280 -1.37 139.2

1080 -1.45 -108.4 2340 -1.39 134.5

1140 -1.46 -114.5 2400 -1.37 129.5

1200 -1.40 -120.5 2460 -1.39 124.7

1260 -1.40 -126.5 2520 -1.38 119.9

1320 -1.39 -132.6 2580 -1.40 115.2

1380 -1.37 -138.9 2640 -1.39 110.4

1440 -1.35 -144.6 2700 -1.40 105.7

1500 -1.37 -150.6 — — —

Table 2. RF Input S11

Note: VCC = 2.8V, S11 measured at RFIN bump.

1kΩto avoid loading the RF input signal. There is an

internal resistor to GND of approximately 50kΩ. If the

control source high voltage is greater than 2.8V, calcu-

late and use a resistor value that ensures the ENA pin

only sees a maximum of 2.7V, which is within specifica-

tion. In this manner, the device can be driven from a

control device with a logic-high greater than 2.8V.

Evaluation Kit Information

MAX2202 EV kit gerber files, schematic, BOM, and

other updates are available on the MAX2202 product

page at Maxim’s website (www.maxim-ic.com).

Layout

The device is not particularly sensitive to the layout

since it only needs 3dBm for maximum output voltage.

However, there are two areas that need attention: the

GND pins and the supply bypassing. Connect the GND

pins to the PCB ground with a ground via as close as

possible, and bypass VCC to ground with a capacitor

as close as possible to the part.

MAX2202

RMS Power Detector

_______________________________________________________________________________________ 7

Chip Information

PROCESS: BiCMOS

Package Information

For the latest package outline information and land pat-

terns (footprints), go to www.maxim-ic.com/packages.

Note that a “+”, “#”, or “-” in the package code indi-

cates RoHS status only. Package drawings may show a

different suffix character, but the drawing pertains to

the package regardless of RoHS status.

PACKAGE

TYPE

PACKAGE

CODE OUTLINE NO. LAND

PATTERN NO.

6 WLP W61B1+1 21-0217

Refer to

Application

Note 1891

Revision History

REVISION

NUMBER

REVISION

DATE DESCRIPTION PAGES

CHANGED

0 9/10 Initial release —

1 2/11 Updated Log Conformance Error with 10dB Step specifications in AC Electrical

Characteristics; updated TOC 6 and 7 in Typical Operating Characteristics 2, 3

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

RMS Power Detector

MAX2202