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PA Controller. AD8311 Datasheet

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PA Controller. AD8311 Datasheet






AD8311 Controller. Datasheet pdf. Equivalent




AD8311 Controller. Datasheet pdf. Equivalent





Part

AD8311

Description

50 dB GSM PA Controller



Feature


FEATURES Complete RF detector/controller function >50 dB range at 0.9 GHz (−4 8 dBm to +3 dBm re 50 Ω) Accurate scal ing 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 c ontrol loop Low power: 20 mW at 2.7 V A PPLICATIONS Single, dual, and triple ba nd mobile handset (GSM,.
Manufacture

Analog Devices

Datasheet
Download AD8311 Datasheet


Analog Devices AD8311

AD8311; DCS, EDGE) Transmitter power control GE NERAL DESCRIPTION The AD8311 is a compl ete low cost subsystem for the precise control of RF power amplifiers operatin g in the frequency range 0.1 GHz to 2.5 GHz and over a typical dynamic range o f 50 dB. It is intended for use in cell ular handsets and other batteryoperated wireless devices. The log amp techniqu e provides a much .


Analog Devices AD8311

wider measurement range and better accur acy than controllers using diode detect ors. In particular, its temperature sta bility is excellent over a specified ra nge of −40°C to +85°C. 50 dB GSM P A Controller AD8311 Its high sensitivit y allows control at .


Analog Devices AD8311

.

Part

AD8311

Description

50 dB GSM PA Controller



Feature


FEATURES Complete RF detector/controller function >50 dB range at 0.9 GHz (−4 8 dBm to +3 dBm re 50 Ω) Accurate scal ing 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 c ontrol loop Low power: 20 mW at 2.7 V A PPLICATIONS Single, dual, and triple ba nd mobile handset (GSM,.
Manufacture

Analog Devices

Datasheet
Download AD8311 Datasheet




 AD8311
FEATURES
Complete RF detector/controller function
>50 dB range at 0.9 GHz (−48 dBm to +3 dBm re 50 Ω)
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
APPLICATIONS
Single, dual, and triple band mobile handset (GSM, DCS,
EDGE)
Transmitter power control
GENERAL DESCRIPTION
The AD8311 is a complete low cost subsystem for the precise
control of RF power amplifiers operating in the frequency range
0.1 GHz to 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 −40°C to +85°C.
50 dB GSM PA Controller
AD8311
Its high sensitivity allows control at low signal levels, thus
reducing the amount of power that needs to be coupled to the
detector. 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 can be dc-grounded.
The AD8311 provides a voltage output, VAPC, which has the
voltage range and current drive to directly connect to the gain
control pin of most handset power amplifiers. VAPC can swing
from 300 mV above ground to within 200 mV below the supply
voltage. Load currents of up to 6 mA can be supported.
The setpoint control input is applied to pin VSET and has an
operating range of 0.25 V to 1.4 V. The associated circuit
determines the slope and intercept of the linear-in-dB
measurement system; these are nominally 23.6 mV/dB and
−59.7 dBm at 0.9 GHz. Further simplifying the application of
the AD8311, the input resistance of the setpoint interface is over
35 MΩ, and the bias current is typically 0.26 μA.
The AD8311 is available in a 6-ball wafer-level chip scale
package (WLCSP), 1.0 mm × 1.5 mm, and consumes 7.6 mA
from a 2.7 V to 5.5 V supply.
FUNCTIONAL BLOCK DIAGRAM
VPOS
LOW NOISE
GAIN BIAS
LOW NOISE
BAND GAP
REFERENCE
RFIN
DET
DET
DET
DET
DET
10dB
10dB
10dB
10dB
COMM
OFFSET
COMPENSATION
INTERCEPT
POSITIONING
Figure 1.
1.35
VAPC
HI-Z
LOW NOISE
RAIL-TO-RAIL BUFFER
FLTR
VSET
VI
23mV/dB
250mV TO
1.4V = 50dB
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113 ©2005–2011 Analog Devices, Inc. All rights reserved.




 AD8311
AD8311* Product Page Quick Links
Last Content Update: 11/01/2016
Comparable Parts
View a parametric search of comparable parts
Evaluation Kits
• AD8311 Evaluation Board
Documentation
Application Notes
• AN-1040: RF Power Calibration Improves Performance of
Wireless Transmitters
Data Sheet
• AD8311: 50 dB GSM PA Controller Data Sheet
Product Highlight
• Industrial Applications
Tools and Simulations
• ADIsimPLL™
• ADIsimRF
Reference Materials
Product Selection Guide
• RF Source Booklet
Technical Articles
• Design a Logamp RF Pulse Detector
• Detecting Fast RF Bursts using Log Amps
• Log Amps and Directional Couplers Enable VSWR
Detection
• Make Precise Base-Station Power Measurements
• Measurement and Control of RF Power, Part I
• Measurement and Control of RF Power, Part II
• Measurement and Control of RF Power, Part III
• Measuring the RF Power in CDMA2000 and W-CDMA
High Power Amplifiers (HPAs)
• Measuring VSWR and Gain in Wireless Systems
Design Resources
• AD8311 Material Declaration
• PCN-PDN Information
• Quality And Reliability
• Symbols and Footprints
Discussions
View all AD8311 EngineerZone Discussions
Sample and Buy
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Technical Support
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 AD8311
AD8311
TABLE OF CONTENTS
Specifications..................................................................................... 3 
Absolute Maximum Ratings............................................................ 5 
ESD Caution.................................................................................. 5 
Pin Configuration and Function Descriptions............................. 6 
Typical Performance Characteristics ............................................. 7 
Theory of Operation ...................................................................... 11 
Basic Theory................................................................................ 11 
Controller-Mode Log Amps ..................................................... 12 
Control Loop Dynamics............................................................ 12 
Basic Connections ...................................................................... 14 
Range on VSET and RFIN......................................................... 14 
Transient Response..................................................................... 15 
REVISION HISTORY
1/11—Rev. 0 to Rev. A
Updated Outline Dimensions ....................................................... 22
Changes to Ordering Guide .......................................................... 22
6/05—Revision 0: Initial Version
Mobile Handset Power Control Example ............................... 15 
Power-On and Power-Off ......................................................... 16 
Input Coupling Options ............................................................ 16 
Temperature Drift ...................................................................... 17 
Device Calibration and Error Calculation.............................. 17 
Selecting Calibration Points to Improve Accuracy over a
Reduced Range ........................................................................... 18 
Device Handling......................................................................... 19 
Evaluation Board ............................................................................ 20 
Outline Dimensions ....................................................................... 22 
Ordering Guide .......................................................................... 22 
Rev. A | Page 2 of 24



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