MAXIM MAX4003 Technical data

General Description

The MAX4003 low-cost, low-power logarithmic amplifier
is designed to detect the power levels of RF power
amplifiers (PAs) operating from 100MHz to 2500MHz. A
typical dynamic range of 45dB makes this logarithmic
amplifier useful in a variety of wireless applications
including cellular handset PA control, TSSI for wireless
terminal devices, and other transmitter power measure­ments. This logarithmic amplifier provides much wider
measurement range and superior accuracy than typical
diode-based detectors. Excellent temperature stability is
achieved over the full operating range of -40°C to +85°C.

The MAX4003 logarithmic amplifier is a voltage-mea­suring device with a typical signal range of -58dBV to

-13dBV. The input signal is internally AC-coupled by an
on-chip 5pF capacitor in series with a 2kΩ resistance.
This highpass coupling, with a corner at 16MHz, sets
the lowest operating frequency and allows the input
signal source to be DC grounded. The MAX4003 also
features a power-on delay, which holds the detector
output (OUT) low for approximately 5µs to ensure
glitchless controller output.

The MAX4003 is available in an 8-bump chip-scale pack­age (UCSP™), an 8-pin µMAX package, and an 8-pin thin
QFN package. The device consumes 5.9mA with a 3.0V
supply and only 13µA when the device is in shutdown.

Applications

Cellular Handsets (TDMA, CDMA, GPRS, GSM)

TSSI for Wireless Terminal Devices

Transmitter Power Measurement and Control

RSSI for Fiber Modules

Features

♦ Complete RF Detector

♦ Frequency Range from 100MHz to 2500MHz

♦ Input Range of -58dBV to -13dBV

(-45dBm to 0dBm into 50Ω)

♦ Fast Response: 70ns in 10dB Steps

♦ Low-Current Consumption: 5.9mA at V

CC

= 3.0V

♦ 13µA (typ) Shutdown Current

♦ Available in 8-Bump UCSP or 8-Pin µMAX and

Thin QFN Packages

MAX4003

100MHz to 2500MHz, 45dB RF Detector

in a UCSP

________________________________________________________________ Maxim Integrated Products 1

Ordering Information

10dB

DET

10dB 10dB10dB

DET

DET DETDET

OFFSET

COMP

LOW-

NOISE

BANDGAP

OUTPUT
ENABLE

DELAY

GND

g

m

+

-

1X

V-I

RFIN

V

CC

SHDN

OUT

CLPF

MAX4003

Functional Diagram

19-2620; Rev 1; 3/03

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.

PART

TEMP RANGE

PIN/BUMP­PACKAGE

TOP

MARK

MAX4003EBL-T

8 UCSP-8 ABV

MAX4003EUA

8 µMAX —

MAX4003ETA-T

ADG

Pin Configurations

MAX4003

1

2

3

4

8

7

6

5

V

CC

OUT

N.C.

GND

CLPF

A

123

B

C

GND

RFIN

µMAX

SHDN

RFIN GND

V

CC

CLPF

V

CC

OUT GND

SHDN

MAX4003

UCSP

TOP VIEW
(BUMPS ON BOTTOM)

TOP VIEW

UCSP is a trademark of Maxim Integrated Products, Inc.

Pin Configurations continued at end of data sheet.

EVALUATION KIT

AVAILABLE

-40°C to +85°C

-40°C to +85°C

-40°C to +85°C8 Thi n QFN - E P

MAX4003

100MHz to 2500MHz, 45dB RF Detector
in a UCSP

2 _______________________________________________________________________________________

ABSOLUTE MAXIMUM RATINGS

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.

VCCto GND.........................................................-0.3V to +5.25V

SHDN, CLPF to GND..................................-0.3V to (VCC+ 0.3V)

RFIN..................................................................................+6dBm

OUT Short Circuit to GND.......................................................10s

Continuous Power Dissipation (T

A

= +70°C)

8-Bump UCSP (derate 4.7mW/°C above +70°C).........379mW

8-Pin µMAX (derate 4.5mW/°C above +70°C) .............362mW

8-Pin Thin QFN (derate 24.4mW/°C above +70°C) ...1951mW

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

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

Storage Temperature Range .............................-65°C to +150°C

Lead Temperature (soldering, 10s) .................................+300°C

DC ELECTRICAL CHARACTERISTICS

(VCC= 3.0V, V

SHDN

= VCC, C

CLPF

= 0.1µF, TA= -40°C to +85°C. Typical values are at TA= +25°C, unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Supply Voltage V

CC

2.7 5.0 V

V

SHDN

= 1.8V 5.9 10 mA

Supply Current I

CC

VCC = 5.0V

V

SHDN

= 0.8V 13 30 µA

V

SHDN

= 3.0V 5 20

Shutdown Input Current I

SHDN

V

SHDN

= 0V

±5

µA

Logic High Threshold Voltage V

IH

1.8 V

Logic Low Threshold Voltage V

IL

0.8 V

DETECTOR OUTPUT

RFIN = 0dBm

Voltage Range V

OUT

RFIN = -45dBm

V

Output Voltage in Shutdown V

OUT

V

SHDN

= 0V 1 mV

Output-Referred Noise fo =150kHz 8

nV/√Hz

Small-Signal Bandwidth BW C

CLPF

= 150pF 8 MHz

Slew Rate V

OUT

= 0.36V to 1.45V, C

CLPF

= 150pF 5 V/µs

-0.01

1.45

0.36

MAX4003

100MHz to 2500MHz, 45dB RF Detector

in a UCSP

_______________________________________________________________________________________ 3

Note 1: All devices are 100% production tested at TA= +25°C and are guaranteed by design for TA= -40°C to +85°C as specified.

All production AC tests are done at 100MHz.

Note 2: Typical minimum and maximum range of the detector.

AC ELECTRICAL CHARACTERISTICS

(VCC= 3.0V, V

SHDN

= VCC, C

CLPF

= 0.1µF, fRF= 100MHz to 2500MHz, TA= -40°C to +85°C. Typical values are at TA= +25°C,

unless otherwise noted.) (Note 1)

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

RF Input Frequency Range f

RF

MHz

RF Input Voltage Range V

RF

(Note 2) -58 -13 dBV

Equivalent RF Input Power Range

P

RF

With 50Ω termination (Note 2) -45 0

dBm

fRF = 100MHz, TA = +25°C

fRF = 100MHz

fRF = 900MHz

Logarithmic Slope

f

RF

= 1900MHz

mV/dB

fRF = 100MHz, TA = +25°C

-57

fRF = 100MHz -64 -50

fRF = 900MHz -57

Logarithmic Intercept P

X

fRF = 1900MHz -56

dBm

R

IN

2kΩ

RFIN Input Impedance

C

IN

0.5 pF

OUTPUT VOLTAGE

vs. INPUT POWER (µMAX)

MAX4003 toc01

INPUT POWER (dBm)

V

OUT

(V)

0-10-50 -40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-60 10

2.5GHz

1.9GHz

0.9GHz

0.1GHz

OUTPUT VOLTAGE

vs. INPUT POWER (UCSP)

MAX4003 toc02

INPUT POWER (dBm)

V

OUT

(V)

0-10-30 -20-40-50

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

-60 10

2.5GHz

1.9GHz

0.9GHz

0.1GHz

LOG CONFORMANCE

vs. INPUT POWER (µMAX)

MAX4003 toc03

INPUT POWER (dBm)

ERROR (dB)

0-10-40 -30 -20

-3

-2

-1

0

1

2

3

4

-4

-50 10

2.5GHz

1.9GHz

0.9GHz

0.1GHz

Typical Operating Characteristics

(VCC= V

SHDN

= 3.0V, C

CLPF

= 0.1µF, TA= +25°C, unless otherwise noted.)

100 2500

22.8 25.5 28.2

22.5 28.5

25.0

29.0

-62.3

-51.7

Typical Operating Characteristics (continued)

(VCC= V

SHDN

= 3.0V, C

CLPF

= 0.1µF, TA= +25°C, unless otherwise noted.)

MAX4003

100MHz to 2500MHz, 45dB RF Detector
in a UCSP

4 _______________________________________________________________________________________

LOG CONFORMANCE

vs. INPUT POWER (UCSP)

MAX4003 toc4

INPUT POWER (dBm)

ERROR (dB)

0-10-40 -30 -20

-3

-2

-1

0

1

2

3

4

-4

-50 10

2.5GHz

0.9GHz

0.1GHz

1.9GHz

V

OUT

AND LOG CONFORMANCE

vs. INPUT POWER AT 0.1GHz (µMAX)

MAX4003 toc05

INPUT POWER (dBm)

V

OUT

(V)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

V

OUT

AND LOG CONFORMANCE

vs. INPUT POWER AT 0.1GHz (UCSP)

MAX4003 toc06

INPUT POWER (dBm)

V

OUT

(V)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

V

OUT

AND LOG CONFORMANCE

vs. INPUT POWER AT 0.9GHz (µMAX)

MAX4003 toc07

INPUT POWER (dBm)

V

OUT

(V)

ERROR (dB)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

V

OUT

AND LOG CONFORMANCE

vs. INPUT POWER AT 0.9GHz (UCSP)

MAX4003 toc08

INPUT POWER (dBm)

V

OUT

(V)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

ERROR (dB)

V

OUT

AND LOG CONFORMANCE

vs. INPUT POWER AT 1.9GHz (µMAX)

MAX4003 toc09

INPUT POWER (dBm)

V

OUT

(V)

ERROR (dB)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

TA = +85°C

TA = +25°C

TA = -40°C

V

OUT

AND LOG CONFORMANCE

vs. INPUT POWER AT 1.9GHz (UCSP)

MAX4003 toc10

INPUT POWER (dBm)

V

OUT

(V)

ERROR (dB)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

TA = +85°C

TA = +25°C

TA = -40°C

V

OUT

AND LOG CONFORMANCE

vs. INPUT POWER AT 2.5GHz (µMAX)

MAX4003 toc11

INPUT POWER (dBm)

V

OUT

(V)

ERROR (dB)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

TA = +85°C

TA = +25°C

TA = -40°C

V

OUT

AND LOG CONFORMANCE

vs. INPUT POWER AT 2.5GHz (UCSP)

MAX4003 toc12

INPUT POWER (dBm)

V

OUT

(V)

ERROR (dB)

0-10-40 -30 -20

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

0.2

-3

-2

-1

0

1

2

3

4

-4

-50 10

TA = +85°C

TA = +25°C

TA = -40°C

TA = +85°C

TA = +25°C

TA = -40°C