LMV242LDSLASHNOPB.A中文资料德州仪器数据手册PDF规格书

1FEATURES

2• Support of InGaP HBT, Bipolar Technology

• Quad-Band Operation

• Shutdown Mode for Power Save in RX Slot

• Integrated Ramp Filter

• 50 dB RF Detector

• GPRS Compliant

• External Loop Compensation Option

• Accurate Temperature Compensation

• WSON Package 3x3 mm and Fully Tested Die

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APPLICATIONS

• GSM/GPRS/TDMA/TD_SCDMA Mobile Phone

• Pulse RF Control

• Wireless LAN

• GSM/GPRS Power Amplifier Module

• Transmit Module

DESCRIPTION

The LMV242 is a power amplifier (PA) controller

intended for use within an RF transmit power control

loop in GSM/GPRS mobile phones. The LMV242

supports all single-supply PA’s including InGaP, HBT

and bipolar power amplifiers. The device operates

with a single supply from 2.6V to 5.5V.

Included in the PA controller are an RF detector, a

ramp filter and two selectable output drivers that

function as error amplifiers for two different bands.

The LMV242 input interface consists two analog and

two digital inputs. The analog inputs are the RF input,

Ramp voltage input. The digital inputs perform the

function of “Band Select” and “Shutdown/Transmit

Enable” respectively. The “Band Select” function enables either of two outputs, namely OUT1 when BS

= High, or output OUT2 when BS = Low. The output

that is not enabled is pulled low to the minimum

output voltage. The LMV242 is active in the case

TX_EN = High. When TX_EN = Low the device is in

a low power consumption shutdown mode. During

shutdown both outputs will be pulled low to the

minimum output voltage. Individual PA characteristics

are accommodated by a user selectable external RC

combination.

The LMV242 is offered in fully tested die form as well

as in a 10-lead WSON package and is therefore

especially suitable for small footprint PA module

solutions.