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LTC4401-1#TRPBF

Description
LTC4401-1#TRPBF
CategoryThe embedded processor and controller    Microcontrollers and processors   
File Size189KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC4401-1#TRPBF Overview

LTC4401-1#TRPBF

LTC4401-1#TRPBF Parametric

Parameter NameAttribute value
Is it Rohs certified?conform to
MakerLinear ( ADI )
package instruction,
Reach Compliance Codecompli
LTC4401-1/LTC4401-2
RF Power Controllers
with 250kHz Loop BW
and 45dB Dynamic Range
FEATURES
s
s
s
DESCRIPTIO
s
s
s
s
s
s
s
s
s
s
s
s
RF Power Amplifier Control in ThinSOT
TM
Package
Internal Schottky Diode Detector with > 45dB Range
Wide Input Frequency Range:
300MHz to 2.7GHz (LTC4401-1)
300MHz to 2GHz (LTC4401-2)
Autozero Loop Cancels Offset Errors and
Temperature Dependent Offsets
Wide V
CC
Range: 2.7V to 6V
Automatic Bandwidth Control Improves Low Power
Ramp Response
Allows Direct Connection to Battery
RF Output Power Set by External DAC
Internal Frequency Compensation
Rail-to-Rail Power Control Output
Power Control Signal Overvoltage Protection
Low Operating Current: 1mA
Low Shutdown Current: 10µA
Two Pole PCTL Input Filtering
Low Profile (1mm) SOT-23 (ThinSOT™) (LTC4401-1)
and 8-Pin MSOP (LTC4401-2) Packages
The LTC
®
4401-1 is a SOT-23 RF power controller for slow
turn-on RF power amplifiers operating in the 300MHz to
2.7GHz range. The loop bandwidth is set at 250kHz
to improve frequency stability when controlling slow
turn-on RF power amplifiers such as the Conexant
CX77301/CX77302, CX77304, CX77314, Anadigics
AWT6107 and the RF Micro Devices RF3160.
RF power is controlled by driving the RF amplifier power
control pins and sensing the resultant RF output power
via a directional coupler. The RF sense voltage is peak
detected using an on-chip Schottky diode. This detected
voltage is compared to the DAC voltage at the PCTL pin
to control the output power. The RF power amplifier is
protected against high power control pin voltages.
Internal and external offsets are cancelled over tempera-
ture by an autozero control loop, allowing accurate low
power programming. The shutdown feature disables the
part and reduces the supply current to < 10µA.
A dual control channel version (LTC4401-2) is also
available in an 8-pin MSOP package.
, LTC and LT are registered trademarks of Linear Technology Corporation.
ThinSOT is a trademark of Linear Technology Corporation.
APPLICATIO S
s
s
s
s
GSM/GPRS Cellular Telephones
PCS Devices
Wireless Data Modems
U.S. TDMA Cellular Phones
TYPICAL APPLICATIO
LTC4401-1 Dual Band Cellular Telephone Transmitter
68Ω
33pF
Li-Ion
0.1µF
6
V
CC
LTC4401-1
SHDN
4
SHDN
V
PCA
5
V
PC
900MHz
INPUT
1.8GHz
INPUT
900MHz
OUTPUT
RF
1
BAND
SELECT
3
DAC
PCTL
GND
2
PA MODULE
1.8GHz
OUTPUT
50Ω
4401 TA01
U
4401fa
U
U
1
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