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參數資料
| 型號： | MAX4473 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Low-Cost, Low-Voltage, PA Power Control Amplifier for GSM Applications in 8-Pin レMAX |
| 中文描述： | 低成本、低電壓、PA功率控制放大器，用于GSM應用 |
| 文件頁數： | 1/6頁 |
| 文件大小： | 140K |
| 代理商： | MAX4473 |
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
General Desc ription
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) via a control voltage.
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
supply 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
shutdown 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 com-
promising dynamic performance. The MAX4473 is
available in a space-saving 8-pin μMAX package.
Applic ations
GSM Cellular Phones
Cordless Phones
Precision Current Control
High-Frequency Servo Loops
Features
o
Optimized for GSM Timing Requirements
o
+2.7V to +6.5V Single-Supply Operation
o
1.2mA Supply Current
o
≤
1μA Supply Current in Shutdown Mode
o
Guaranteed 1.5μs Enable/Disable Times
o
Active Output Pull-Down in Shutdown Mode
o
Rail-to-Rail Error Amplifier Output
o
Rail-to-Rail Power Control Input
o
Output Drive Capability—500
and 300pF Loads
o
+1V to V
CC
Current Sense Input Common-Mode
Voltage Range
o
No Phase-Reversal for Common-Mode Voltage
from 0 to V
CC
o
External Current Sensing and Gain Setting
Resistors Maximize Flexibility
o
Available in a Space-Saving 8-pin μMAX
M
Low-Cost, Low-Voltage, PA Power Control
Amplifier for GS M Applic ations in 8-Pin μMAX
________________________________________________________________ Maxim Integrated Products
1
GND
PC
0.1
μ
F
8
V
CC
7
R
3R
A3
PA
GC
IN
RFIN
4
3 SHDN
BUFFER
5
6
A2
Q1
A1
1
2
SR2
SR1
SR3
RG3
OUT
V-TO-I
CONVERTER
ERROR
AMPLIFIER
V
CC
V
CC
R
SENSE
RG1
RG2
I
CCPA
MAX4473
4
·
RG3
·
R
SENSE
V
PC
·
RG1
I
CCPA
=
Typic al Operating Circ uit
19-1448; Rev 0; 3/99
PART
MAX4473EUA
MAX4473ESA
-40°C to +85°C
-40°C to +85°C
TEMP. RANGE
PIN-PACKAGE
8 μMAX
8 SO
Pin Configuration appears at end of data sheet.
Ordering Information
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.
相關PDF資料 |
PDF描述 |
|---|---|
| MAX4473EUA | Low-Cost, Low-Voltage, PA Power Control Amplifier for GSM Applications in 8-Pin レMAX |
| MAX4475AUT-T | SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op Amps |
| MAX4476AUT-T | SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op Amps |
| MAX4475 | SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op Amps |
| MAX4476 | Quadruple RS-485 Differential Line Receivers 16-SOIC -40 to 85 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX4473C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX4473ESA | 功能描述:功率放大器 PA Power Control Amp for GSM Aps RoHS:否 制造商:TriQuint Semiconductor 封裝 / 箱體: 工作電源電壓:28 V 電源電流:2.5 A 工作溫度范圍: 封裝: |
| MAX4473ESA-T | 功能描述:射頻放大器 PA Power Control Amp for GSM Aps RoHS:否 制造商:Skyworks Solutions, Inc. 類型:Low Noise Amplifier 工作頻率:2.3 GHz to 2.8 GHz P1dB:18.5 dBm 輸出截獲點:37.5 dBm 功率增益類型:32 dB 噪聲系數:0.85 dB 工作電源電壓:5 V 電源電流:125 mA 測試頻率:2.6 GHz 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 封裝:Reel |
| MAX4473ETA | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX4473ETA-T | 制造商:Maxim Integrated Products 功能描述:LOW-COST, LOW-VOLTAGE, PA POWER CONTROL AMPLI - Tape and Reel |
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