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AD8315ARM PDF预览

AD8315ARM

更新时间: 2024-01-19 19:02:05
品牌 Logo 应用领域
亚德诺 - ADI 电信集成电路电信电路光电二极管控制器GSM
页数 文件大小 规格书
20页 634K
描述
50 dB GSM PA Controller

AD8315ARM 技术参数

是否无铅: 不含铅是否Rohs认证: 符合
生命周期:Active零件包装代码:DIE
包装说明:DIE,Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.6JESD-30 代码:R-XUUC-N
JESD-609代码:e3湿度敏感等级:1
功能数量:1封装主体材料:UNSPECIFIED
封装代码:DIE封装形状:RECTANGULAR
封装形式:UNCASED CHIP峰值回流温度(摄氏度):225
认证状态:Not Qualified标称供电电压:2.7 V
表面贴装:YES电信集成电路类型:TELECOM CIRCUIT
端子面层:MATTE TIN端子形式:NO LEAD
端子位置:UPPER处于峰值回流温度下的最长时间:NOT SPECIFIED
Base Number Matches:1

AD8315ARM 数据手册

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50 dB GSM PA Controller  
AD8315  
Its high sensitivity allows control at low signal levels, thus reduc-  
ing the amount of power that needs to be coupled to the detector.  
FEATURES  
Complete RF Detector/Controller Function  
>50 dB Range at 0.9 GHz (–49 dBm to +2 dBm re 50 )  
Accurate Scaling from 0.1 GHz to 2.5 GHz  
Temperature-Stable Linear-in-dB Response  
Log Slope of 23 mV/dB, Intercept at –60 dBm at 0.9 GHz  
True Integration Function in Control Loop  
Low Power: 20 mW at 2.7 V, 38 mW at 5 V  
Power Down to 10.8 W  
For convenience, the signal is internally ac-coupled. This  
high-pass coupling, with a corner at approximately 0.016 GHz,  
determines the lowest operating frequency. Thus, the source  
may be dc grounded.  
The AD8315 provides a voltage output, VAPC, that has the  
voltage range and current drive to directly connect to most hand-  
set power amplifiers’ gain control pin. VAPC can swing from 250  
mV above ground to within 200 mV below the supply voltage.  
Load currents of up to 6 mA can be supported.  
APPLICATIONS  
Single, Dual, and Triple Band Mobile Handset  
(GSM, DCS, EDGE)  
The setpoint control input is applied to pin VSET and has an  
operating range of 0.25 V–1.4 V. The associated circuit deter-  
mines the slope and intercept of the linear-in-dB measurement  
system; these are nominally 23 mV/dB and –60 dBm for a 50 W  
termination (–73 dBV) at 0.9 GHz. Further simplifying the  
application of the AD8315, the input resistance of the setpoint  
interface is over 100 MW, and the bias current is typically 0.5 mA.  
Transmitter Power Control  
PRODUCT DESCRIPTION  
The AD8315 is a complete low cost subsystem for the precise  
control of RF power amplifiers operating in the frequency range  
0.1 GHz–2.5 GHz and over a typical dynamic range of 50 dB. It is  
intended for use in cellular handsets and other battery-operated  
wireless devices. The log amp technique provides a much wider  
measurement range and better accuracy than controllers using  
diode detectors. In particular, its temperature stability is excellent  
over a specified range of –30C to +85C.  
The AD8315 is available in MSOP and lead frame chip scale  
(LFCSP) packages and consumes 8.5 mA from a 2.7 V to 5.5 V  
supply. When powered down, the sleep current is 4 mA.  
FUNCTIONAL BLOCK DIAGRAM  
VPOS  
ENBL  
LOW NOISE  
BAND GAP  
REFERENCE  
OUTPUT  
ENABLE  
DELAY  
LOW NOISE  
GAIN BIAS  
VAPC  
1.35  
HI-Z  
DET  
DET  
DET  
DET  
DET  
LOW NOISE (25nV/ Hz)  
RAIL-TO-RAIL BUFFER  
RFIN  
FLTR  
10dB  
10dB  
10dB  
10dB  
VSET  
V-I  
23mV/dB  
OFFSET  
COMP’N  
INTERCEPT  
POSITIONING  
250mV to  
1.4V = 50dB  
COMM  
REV. B  
Information furnished by Analog Devices is believed to be accurate and  
reliable. However, no responsibility is assumed by Analog Devices for its  
use, norforanyinfringementsofpatentsorotherrightsofthirdpartiesthat  
may result from its use. No license is granted by implication or otherwise  
under any patent or patent rights of Analog Devices. Trademarks and  
registered trademarks are the property of their respective companies.  
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.  
Tel: 781/329-4700  
Fax: 781/326-8703  
www.analog.com  
© 2003 Analog Devices, Inc. All rights reserved.  

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