MAX4003 Maxim, MAX4003 Datasheet

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MAX4003

Manufacturer Part Number
MAX4003
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
Manufacturer
Maxim
Datasheet

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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 measure-
ments. 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-mea-
suring 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 2k
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 pack-
age (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.
19-2620; Rev 1; 3/03
UCSP is a trademark of Maxim Integrated Products, Inc.
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.
Cellular Handsets (TDMA, CDMA, GPRS, GSM)
TSSI for Wireless Terminal Devices
Transmitter Power Measurement and Control
RSSI for Fiber Modules
________________________________________________________________ Maxim Integrated Products
SHDN
RFIN
GND
V
CC
100MHz to 2500MHz, 45dB RF Detector
General Description
Applications
DET
OFFSET
10dB
COMP
resistance.
DET
10dB
DET
OUTPUT
ENABLE
10dB
DELAY
♦ Complete RF Detector
♦ Frequency Range from 100MHz to 2500MHz
♦ Input Range of -58dBV to -13dBV
♦ Fast Response: 70ns in 10dB Steps
♦ Low-Current Consumption: 5.9mA at V
♦ 13µA (typ) Shutdown Current
♦ Available in 8-Bump UCSP or 8-Pin µMAX and
MAX4003EBL-T
MAX4003EUA
MAX4003ETA-T
Pin Configurations continued at end of data sheet.
(-45dBm to 0dBm into 50 )
Thin QFN Packages
C
DET
A
B
PART
TOP VIEW
(BUMPS ON BOTTOM)
RFIN
V
V
1
10dB
CC
CC
BANDGAP
NOISE
LOW-
MAX4003
UCSP
DET
SHDN
OUT
2
-40°C to +85°C 8 UCSP-8
-40°C to +85°C 8 µMAX
-40°C to +85°C 8 Thi n QFN - E P
TEMP RANGE
+
-
g
m
CLPF
GND
GND
MAX4003
3
Ordering Information
V-I
1X
Functional Diagram
Pin Configurations
SHDN
CLPF
RFIN
GND
OUT
CLPF
in a UCSP
1
2
3
4
PIN/BUMP-
PACKAGE
TOP VIEW
MAX4003
MAX
Features
CC
8
7
6
5
= 3.0V
V
OUT
N.C.
GND
CC
MARK
ADG
TOP
ABV
1

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MAX4003 Summary of contents

Page 1

... This highpass coupling, with a corner at 16MHz, sets the lowest operating frequency and allows the input signal source grounded. The MAX4003 also features a power-on delay, which holds the detector output (OUT) low for approximately 5µs to ensure glitchless controller output ...

Page 2

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

Page 3

... RF Input Frequency Range RF Input Voltage Range Equivalent RF Input Power Range Logarithmic Slope Logarithmic Intercept RFIN Input Impedance Note 1: All devices are 100% production tested at T All production AC tests are done at 100MHz. Note 2: Typical minimum and maximum range of the detector 3.0V 0.1µF, T SHDN CLPF CC OUTPUT VOLTAGE vs ...

Page 4

... 1 1 0.2 -4 -50 -40 -30 -20 - INPUT POWER (dBm) MAX4003 toc06 MAX4003 toc09 MAX4003 toc12 - ...

Page 5

... -60 -61 2.0 2.5 0 0.5 1.0 1.5 FREQUENCY (GHz) RFIN INPUT IMPEDANCE vs. FREQUENCY ( MAX) 2500 X 2000 FREQUENCY (GHz 0.1 1500 0.9 1.9 2.5 1000 500 0.5 1.0 1.5 5.0 5.5 FREQUENCY (GHz) 0.1GHz 4.5 5 2.0 2.5 MAX4003 toc21 0 -100 -200 2100 -794 -300 500 -91 52 -35 -400 27 -366 -500 -600 -700 -800 2.0 2.5 5 ...

Page 6

... OUT 2 s/div OUTPUT NOISE SPECTRAL DENSITY 100 1k 10k 100k FREQUENCY (Hz) 6 _______________________________________________________________________________________ Typical Operating Characteristics (continued) = +25°C, unless otherwise noted.) A MAX4003 toc22 0 7 -100 6 -200 5 1916 -839 909 -125 -300 4 228 -48 -400 3 102 -29 -500 2 -600 1 -700 ...

Page 7

RF Detector ( 3.0V 0.1µF, T SHDN CC CLPF MINIMUM OUTPUT VOLTAGE vs. SUPPLY VOLTAGE 0. 900MHz -50dBm RF RFIN 0. 0mA, 5mA, 10mA LOAD ...

Page 8

... Output Voltage vs. RF Input Power graph. The logarithmic slope is defined as the change in the detector output vs. the change in RF input. The MAX4003 slope at low frequencies is approximately 25.5mV/dB. Variation in temperature and supply volt- age does not alter the slope significantly, as shown in the Typical Operating Characteristics ...

Page 9

... C . CLPF Waveform Considerations Although the input level of the MAX4003 is specified in dBm, the logarithmic amplifier actually responds to rec- tified voltage signals rather than a true RMS power important to realize that input signals with identical root- mean-square power but with unique waveforms result in different logarithmic outputs ...

Page 10

... RF Detector in a UCSP (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages Ø0.50±0.1 0.6±0.1 1 0.6±0.1 D TOP VIEW FRONT VIEW 10 ______________________________________________________________________________________ ...

Page 11

... RF Detector (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) COMMON DIMENSIONS SYMBOL MIN. MAX. A 0.70 0.80 D 2.90 3.10 E 2.90 3.10 A1 0.00 0.05 L 0.20 0.40 k 0.25 MIN. A2 0.20 REF. ______________________________________________________________________________________ Package Information (continued) PACKAGE VARIATIONS PKG ...

Page 12

... For the latest package outline information www.maxim-ic.com/packages.) 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. ...

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