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MAX4473ESA-T

Description
RF Amplifier PA Power Control Amp for GSM Aps
CategoryAnalog mixed-signal IC    The signal circuit   
File Size195KB,9 Pages
ManufacturerMaxim
Websitehttps://www.maximintegrated.com/en.html
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MAX4473ESA-T Overview

RF Amplifier PA Power Control Amp for GSM Aps

MAX4473ESA-T Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerMaxim
Parts packaging codeSOIC
package instruction0.150 INCH, SOIC-8
Contacts8
Reach Compliance Codenot_compliant
Analog Integrated Circuits - Other TypesANALOG CIRCUIT
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)245
Certification statusNot Qualified
Maximum seat height1.75 mm
Maximum supply voltage (Vsup)6.5 V
Minimum supply voltage (Vsup)2.7 V
Nominal supply voltage (Vsup)6 V
surface mountYES
Temperature levelINDUSTRIAL
Terminal surfaceTin/Lead (Sn85Pb15)
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperatureNOT SPECIFIED
width3.9 mm
19-1448; Rev 4; 11/08
Low-Cost, Low-Voltage, PA Power Control
Amplifier for GSM Applications
General Description
The MAX4473 PA power control IC is intended for
closed-loop bias control of GSM power amplifiers. The
device facilitates accurate control of the current deliv-
ered to the power amplifier (PA) through a control volt-
age. The error amplifier senses the voltage drop across
an external current-sense resistor placed between the
supply and the PA. The output of the error amplifier
adjusts the PA gain until the current is proportional to
the power control voltage applied to the MAX4473. This
unique topology is useful in time-division-multiple-
access (TDMA) systems, such as GSM, where accurate
transmit burst shaping and power control is required.
User-selectable current sensing and gain setting resis-
tors maximize flexibility.
The MAX4473 operates from a single 2.7V to 6.5V sup-
ply and typically draws 1.2mA of supply current. The
error amplifier has a common-mode range that extends
from 1V to V
CC
. The power control input and error
amplifier outputs swing rail-to-rail. A low-power shut-
down mode reduces supply current to less than 1µA
and activates an on-board active pull-down at the error
amplifier output. Fast enable/disable times of 0.9µs
reduce average power consumption without compro-
mising dynamic performance. The MAX4473 is avail-
able in a space-saving 8-pin µMAX
®
package.
Features
Optimized for GSM Timing Requirements
2.7V to 6.5V Single-Supply Operation
1.2mA Supply Current
≤ 1µA Supply Current in Shutdown Mode
Guaranteed 1.5µs Enable/Disable Times
Active Output Pull-Down in Shutdown Mode
Rail-to-Rail Error Amplifier Output
Rail-to-Rail Power Control Input
Output Drive Capability—500Ω and 300pF Loads
1V to V
CC
Current Sense Input Common-Mode
Voltage Range
No Phase-Reversal for Common-Mode Voltage
from 0 to V
CC
External Current Sensing and Gain Setting
Resistors Maximize Flexibility
Available in a Space-Saving 8-Pin
µMAX
MAX4473
Ordering Information
PART
MAX4473EUA
MAX4473ESA
TEMP RANGE
-40°C to +85°C
-40°C to +85°C
PIN-PACKAGE
8 µMAX
8 SO
Applications
GSM Cellular Phones
Cordless Phones
Precision Current Control
High-Frequency Servo Loops
µMAX is a registered trademark of Maxim Integrated Products, Inc.
V
CC
0.1μF
RG1
8
V
CC
A1
BUFFER
3R
V-TO-I
CONVERTER
A2
Q1
1
SR1
2
SR2
A3
R
SENSE
RG2
Pin Configuration appears at end of data sheet.
Typical Operating Circuit
4 PC
OUT
7
GC
IN V
CC
PA
I
CCPA
ERROR
AMPLIFIER
R
3 SHDN
GND
5
MAX4473
SR3
6
RG3
RFIN
I
CCPA
=
V
PC
·
RG1
4
·
RG3
·
R
SENSE
________________________________________________________________
Maxim Integrated Products
1
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.

MAX4473ESA-T Related Products

MAX4473ESA-T MAX4473EUA MAX4473ESA-
Description RF Amplifier PA Power Control Amp for GSM Aps RF Amplifier PA Power Control Amp for GSM Aps RF Amplifier
Is it lead-free? Contains lead Contains lead -
Is it Rohs certified? incompatible incompatible -
Maker Maxim Maxim -
Parts packaging code SOIC SOIC -
package instruction 0.150 INCH, SOIC-8 MICRO MAX PACKAGE-8 -
Contacts 8 8 -
Reach Compliance Code not_compliant not_compliant -
Analog Integrated Circuits - Other Types ANALOG CIRCUIT ANALOG CIRCUIT -
JESD-30 code R-PDSO-G8 S-PDSO-G8 -
JESD-609 code e0 e0 -
length 4.9 mm 3 mm -
Humidity sensitivity level 1 1 -
Number of functions 1 1 -
Number of terminals 8 8 -
Maximum operating temperature 85 °C 85 °C -
Minimum operating temperature -40 °C -40 °C -
Package body material PLASTIC/EPOXY PLASTIC/EPOXY -
encapsulated code SOP TSSOP -
Package shape RECTANGULAR SQUARE -
Package form SMALL OUTLINE SMALL OUTLINE, THIN PROFILE, SHRINK PITCH -
Peak Reflow Temperature (Celsius) 245 240 -
Certification status Not Qualified Not Qualified -
Maximum seat height 1.75 mm 1.1 mm -
Maximum supply voltage (Vsup) 6.5 V 6.5 V -
Minimum supply voltage (Vsup) 2.7 V 2.7 V -
Nominal supply voltage (Vsup) 6 V 6 V -
surface mount YES YES -
Temperature level INDUSTRIAL INDUSTRIAL -
Terminal surface Tin/Lead (Sn85Pb15) Tin/Lead (Sn85Pb15) -
Terminal form GULL WING GULL WING -
Terminal pitch 1.27 mm 0.65 mm -
Terminal location DUAL DUAL -
Maximum time at peak reflow temperature NOT SPECIFIED 20 -
width 3.9 mm 3 mm -
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