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LMV248MDC

更新时间： 2024-11-04 15:37:31
品牌 Logo 应用领域
德州仪器 - TI 电信电信集成电路
页数 文件大小 规格书
11页 282K
描述
LMV248MDC

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中文翻译

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LMV248MDC 技术参数

生命周期：Obsolete包装说明：, DIE OR CHIP
Reach Compliance Code：unknown风险等级：5.84
封装等效代码：DIE OR CHIP电源：2.8 V
认证状态：Not Qualified子类别：Other Telecom ICs
最大压摆率：0.0018 mA标称供电电压：2.8 V
电信集成电路类型：TELECOM CIRCUITBase Number Matches：1

LMV248MDC 数据手册

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September 2001  
LMV248  
Dual Band GSM Power Controller  
General Description  
Features  
n Multi-band cellular operation (example: GSM, PCN)  
The LMV248 RF power amplifier controller allows simple  
implementation of transmit power control loops in GSM and  
DCS/PCS and mobile phones. The LMV248 supports, GaAs  
HBT and bipolar RF power amplifiers. The device operates  
from a single supply of 2.5V to 5V. The LMV248 includes an  
error amplifier with an input summing network, input and  
output band switches, input filters, and output drivers. Ana-  
log input signals processed are:  
n Support of GaAs HBT and bipolar technology  
n Shutdown mode for power save in Rx slot (0.15µA)  
n Integrated ramp filter  
n Built-in current source for biasing Schottky diodes  
n Pre-biasing of PA control gate voltage (VHOME  
n GPRS compliant  
n External loop compensation  
n Detector diode temperature compensation  
n Miniature packaging: LLP-16: 4mm x 4mm x 0.8mm  
)
–
Coupler/detector voltages from GSM and PCN band  
power amplifier outputs.  
–
–
–
Base band DAC ramp signal.  
Temperature compensation diode voltages.  
Pre-bias voltage for faster PA control.  
Applications  
n GSM mobile phone  
n TDMA RF control  
n Wireless LAN  
Selection of the GSM or PCN output driver is made using the  
GSM/PCN band select pin.  
The On/OFF pin allows rapid power up or shutdown of the  
device during Tx or Rx slots. In the off mode, both output  
drivers are set low for PA shutdown. In the on mode, the  
non-active driver will remain low for continued PA shutdown.  
A single external capacitor/resistor combination is used to  
adjust the closed loop frequency response.  
n PC and PDA modules  
n GPS navigation modules  
The LMV248 replaces multiple discrete parts, reducing  
board area and cost. The LLP leadless package minimizes  
board footprint and permits flexible optimized PCB place-  
ment.  
Connection Diagram  
Typical Application Circuit  
16-Pin LLP  
10137201  
Top View  
10137202  
FIGURE 1.  
© 2001 National Semiconductor Corporation  
DS101372  
www.national.com  
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