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PDF LMV243 Data sheet ( Hoja de datos )
| Número de pieza | LMV243 | |
| Descripción | Single-Channel / Quad-Band GSM Power Controller in micro SMD | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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May 2002
LMV243
Single-Channel, Quad-Band GSM Power Controller in
micro SMD
General Description
The device is intended for use within an RF transmit power
control loop in GSM mobile phones and supports GaAs HBT
and bipolar RF single supply power amplifiers. The circuit
operates with a single supply from 2.7V to 3.3V.
The LMV243 contains an RF detector, error amplifier, ramp
V/I converter and output driver. The LMV243 input interface
consists of the RF input, Ramp voltage, and a digital input to
perform the function ’Shutdown/Transmit Enable’. The de-
vice will be active in the case TX_EN = HI, otherwise, the
device goes into a low power consumption shutdown mode.
During shutdown the output will be in high impedance
(tri-state).
A single external RC combination is used to provide stable
operations that accommodates individual PA characteristics.
The LMV243 is offered in a 8-bump micro SMD 1.5mm x
1.5mm package. This space savings package supports flex-
ible product placement almost anywhere in the circuitboard.
Features
(Typical Unless Otherwise Noted)
n 50dB RF detection range (typical)
n micro SMD package 1.5mm x 1.5mm x 0.995mm
n Support of GaAs HBT, bipolar technology
n Quad-band operation
n Shutdown mode for Power Save in Rx slot
n GPRS compliant
n External loop compensation option
n Accurate temperature compensation
n Frequency range is 450MHz to 2GHz
Applications
n GSM mobile phone
n AGC for digital audio
n TDMA RF control
n Wireless LAN
Typical Application
© 2002 National Semiconductor Corporation DS200290
20029034
www.national.com
1 page  
Typical Performance Characteristics Unless otherwise specified, VDD = +2.8V, TJ = 25˚C.
Supply Current vs. Supply Voltage
VOUT and Log Conformance vs. RF Input Power
20029024
VOUT and Log Conformance vs. RF Input Power at
Corners of GSM
20029001
VOUT and Log Conformance vs. RF Input Power at
Corners of DCS
20029002
VOUT and Log Conformance vs. Pin @ Corners of PCS
20029008
VOUT and Log Conformance vs. RF Input Power at
900MHz
20029009
5
20029003
www.national.com
5 Page 
Typical Timing Diagram
20029039
11 www.national.com
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet LMV243.PDF ] | |
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