MAX4001 Maxim, MAX4001 Datasheet

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MAX4001

Manufacturer Part Number
MAX4001
Description
The MAX4000/MAX4001/MAX4002 low-cost, low-power logarithmic amplifiers are designed to control RF power amplifiers (PA) operating in the 0
Manufacturer
Maxim
Datasheet

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The MAX4000/MAX4001/MAX4002 low-cost, low-power
logarithmic amplifiers are designed to control RF power
amplifiers (PA) operating in the 0.1GHz to 2.5GHz fre-
quency range. A typical dynamic range of 45dB makes
this family of log amps useful in a variety of wireless appli-
cations including cellular handset PA control, transmitter
power measurement, and RSSI for terminal devices.
Logarithmic amplifiers provide much wider measurement
range and superior accuracy to controllers based on
diode detectors. Excellent temperature stability is
achieved over the full operating range of -40°C to +85°C.
The choice of three different input voltage ranges elimi-
nates the need for external attenuators, thus simplifying
PA control-loop design. The logarithmic amplifier is a volt-
age-measuring device with a typical signal range of
-58dBV to -13dBV for the MAX4000, -48dBV to -3dBV for
the MAX4001, and -43dBV to +2dBV for the MAX4002.
The input signal for the MAX4000 is internally AC-coupled
using an on-chip 5pF capacitor in series with a 2kΩ input
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
MAX4001/MAX4002 require an external coupling capaci-
tor in series with the RF input port. These PA controllers
feature a power-on delay when coming out of shutdown,
holding OUT low for approximately 5µs to ensure glitch-
free controller output.
The MAX4000/MAX4001/MAX4002 family is available in
an 8-pin µMAX
package (UCSP™). The device consumes 5.9mA with a
5.5V supply, and when powered down the typical shut-
down current is 13µA.
µMAX is a registered trademark of Maxim Integrated Products, Inc.
UCSP is a trademark of Maxim Integrated Products, Inc.
19-2288; Rev 2; 12/07
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.
Transmitter Power Measurement and Control
TSSI for Wireless Terminal Devices
Cellular Handsets (TDMA, CDMA, GPRS, GSM)
RSSI for Fiber Modules
®
________________________________________________________________ Maxim Integrated Products
package and an 8-bump chip-scale
General Description
2.5GHz 45dB RF-Detecting Controllers
Applications
♦ Complete RF-Detecting PA Controllers
♦ Variety of Input Ranges
♦ Frequency Range from 100MHz to 2.5GHz
♦ Temperature Stable Linear-in-dB Response
♦ Fast Response: 70ns 10dB Step
♦ 10mA Output Sourcing Capability
♦ Low Power: 17mW at 3V (typ)
♦ Shutdown Current 30µA (max)
♦ Available in an 8-Bump UCSP and a Small 8-Pin
Pin Configurations appear at end of data sheet.
MAX4000EBL-T
MAX4000EUA
MAX4001EBL-T
MAX4001EUA
MAX4002EBL-T
MAX4002EUA
(PADDLE)
SHDN
RFIN
µMAX Package
GND
V
CC
MAX4000: -58dBV to -13dBV
(-45dBm to 0dBm in 50Ω)
MAX4001: -48dBV to -3dBV
(-35dBm to +10dBm in 50Ω)
MAX4002: -43dBV to +2dBV
(-30dBm to +15dBm in 50Ω)
PART
DET
OFFSET
COMP
10dB
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
-40°C to +85°C
TEMP RANGE
DET
Ordering Information
10dB
Functional Diagram
DET
10dB
DET
PIN-
PACKAGE
8 UCSP-8
8 µMAX
8 UCSP-8
8 µMAX
8 UCSP-8
8 µMAX
10dB
BANDGAP
OUTPUT
ENABLE
DELAY
NOISE
LOW-
DET
Features
+
-
gm
MAX4000
X1
V-I
MARK
TOP
ABD
ABF
ABE
OUT
CLPF
SET
1

Related parts for MAX4001

MAX4001 Summary of contents

Page 1

... PA control-loop design. The logarithmic amplifier is a volt- age-measuring device with a typical signal range of -58dBV to -13dBV for the MAX4000, -48dBV to -3dBV for the MAX4001, and -43dBV to +2dBV for the MAX4002. The input signal for the MAX4000 is internally AC-coupled using an on-chip 5pF capacitor in series with a 2kΩ input resistance ...

Page 2

... MAX4002 ....................................................................+19dBm Equivalent Voltage MAX4000 ..................................................................0.45V MAX4001 ....................................................................1.4V MAX4002 ....................................................................2.0V 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

... Note 3: Set-point slew rate is the rate at which the reference level voltage, applied to the inverting input of the g a voltage step at the SET pin (see Figure 1). Note 4: Typical min/max range for detector. Note 5: MAX4000 internally AC-coupled. Note 6: MAX4001/MAX4002 are internally resistive-coupled to V _______________________________________________________________________________________ = -40°C to +85°C, unless otherwise noted. Typical values are ...

Page 4

... INPUT POWER (dBm) MAX4001 SET vs. INPUT POWER (UCSP) 1.8 1.6 0.1GHz 1.4 1.2 1.9GHz 0.9GHz 1.0 0.8 0.6 2.5GHz 0.4 0.2 0 -50 -40 -30 -20 - INPUT POWER (dBm) MAX4001 LOG CONFORMANCE vs. INPUT POWER (μMAX) 4 2.5GHz 3 0.1GHz 2 1.9GHz 1 0 0.9GHz - -40 -30 -20 - INPUT POWER (dBm) MAX4002 SET vs. INPUT POWER (μMAX) 1.8 1 ...

Page 5

... T = +85° +25° -40°C A 0.4 -3 0.2 -4 -40 -30 -20 - INPUT POWER (dBm) MAX4001 SET AND LOG CONFORMANCE vs. INPUT POWER AT 0.1GHz (UCSP) MAX4000 toc17 1.8 1.6 1.4 1.2 1 +85° +25° -40°C A 0.4 0.2 -40 -30 -20 - INPUT POWER (dBm) MAX4002 LOG CONFORMANCE vs ...

Page 6

... T = +85°C A 0 +25° 0 -40°C A 0.2 -4 -40 -30 -20 - INPUT POWER (dBm) MAX4001 SET AND LOG CONFORMANCE vs. INPUT POWER AT 1.9GHz (μMAX) MAX4000 toc26 1 +85° +25° -40°C A 1 +85° +25° ...

Page 7

... -40°C 1 1 +85° +25° -40°C A 0.4 0.2 -40 -30 -20 -10 0 INPUT POWER (dBm) MAX4001 SET AND LOG CONFORMANCE vs. INPUT POWER AT 2.5GHz (UCSP +85° +25° 1 1.0 0 +85° +25° -40° ...

Page 8

... FREQUENCY (GHz) MAX4001 LOG SLOPE vs. FREQUENCY (UCSP +85° +25° -40° 0.5 1.0 1.5 2.0 2.5 FREQUENCY (GHz) MAX4001 LOG SLOPE vs. V (μMAX 2.5GHz 1.9GHz 28 27 0.9GHz 26 25 0.1GHz 24 2.5 3.0 3.5 4.0 4.5 5.0 5.5 V (V) CC MAX4002 LOG SLOPE vs. FREQUENCY (μMAX) ...

Page 9

... MAX4001 LOG INTERCEPT vs. FREQUENCY (μMAX) -39 -40 - +85° +25°C - -40°C A -45 -46 -47 -48 -49 2.5 0 0.5 1.0 1.5 2.0 FREQUENCY (GHz) MAX4001 LOG INTERCEPT vs. FREQUENCY (UCSP) -40 -42 -44 -46 - +25° -40° +85°C A -52 0 0.5 1.0 1.5 2.0 2.5 FREQUENCY (GHz) MAX4002 LOG SLOPE vs ...

Page 10

... CC MAX4001 LOG INTERCEPT vs. V (UCSP) CC -40 -42 2.5GHz -44 -46 1.9GHz -48 0.1GHz -50 0.9GHz -52 2.5 3.0 3.5 4.0 4.5 5.0 5.5 V (V) CC MAX4001 INPUT IMPEDANCE vs. FREQUENCY (μMAX) MAX4000 toc62 2500 0 -100 X 2000 -200 FREQUENCY (GHz) R JXΩ 0.1 2144 -1205 -300 0.9 959 -121 1500 1.9 104 -36 -400 2.5 47 -29 1000 -500 -600 ...

Page 11

... X -200 -300 1961 -1137 1130 -120 -400 315 -36 163 -26 -500 -600 -700 -800 -900 -1000 1.5 2.0 2.5 1.5V/div SHDN 500mV/div MAX4001 INPUT IMPEDANCE vs. FREQUENCY (UCSP) MAX4000 toc65 2500 X 2000 FREQUENCY (GHz) R JXΩ 0.1 1942 -927 0.9 1009 -136 1500 1.9 314 -57 2.5 139 -37 1000 R 500 0 0 ...

Page 12

... Supply Voltage 2.7V to 5.5V. SHDN V CC RFIN SET GND 12 ______________________________________________________________________________________ Typical Operating Characteristics (continued) 5.5 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1M 10M 2.5 3.0 FUNCTION OUTPUT- ENABLE DELAY LOG DETECTOR BLOCK V-I* BUFFER MAX4000 MAX4001 MAX4002 MAXIMUM OUT VOLTAGE vs LOAD CURRENT CC 0 5mA 10mA 3.5 4.0 4.5 5.0 5.5 V (V) CC Pin Description Block Diagram OUT C CLPF ...

Page 13

... RFIN is in either dBm or dBV and IP is the logarithmic intercept point utilizing the same units as RFIN. Figure 2 provides a circuit example of the MAX4000/ MAX4001/MAX4002 configured as a controller. The MAX4000/MAX4001/MAX4002 require a 2.7V to 5.5V supply voltage. Place a 0.1µF low-ESR, surface-mount ceramic capacitor close to V ...

Page 14

... The Typical Operating Characteristics section has a plot of the sourcing capa- bilities and output swing of OUT. SHDN and Power-On The MAX4000/MAX4001/MAX4002 can be placed in shutdown by pulling SHDN to ground. SHDN reduces supply current to typically 13µA. A graph of SHDN Response is included in the Typical Operating Characteristics section ...

Page 15

... Table 1 pro- vides standard component values at some common fre- quencies for the MAX4001. Note that these inductors must have a high SRF (self-resonant frequency), much higher than the intended frequency of operation to imple- ment this matching scheme ...

Page 16

... RF-Detecting Controllers Waveform Considerations The MAX4000/MAX4001/MAX4002 family of log amps respond to voltage, not power, even though input levels are specified in dBm important to realize that input signals with identical RMS power but unique waveforms results in different log amp outputs. Differing signal waveforms result in either an upward or downward shift in the logarithmic intercept ...

Page 17

... RF-Detecting Controllers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.) ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, 3x3 UCSP 1 21-0093 ...

Page 18

... RF-Detecting Controllers (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages Ø0.50±0.1 0.6±0.1 1 0.6±0.1 D TOP VIEW FRONT VIEW 18 ______________________________________________________________________________________ Package Information (continued) ...

Page 19

... Insertion/correction of figures and text changes. 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 ____________________ 19 © ...

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