ORDERING GUIDE AD8309-EVAL AD8309 evaluation board been care
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AD8309 Evaluation Board EVAL-AD8309EB
ORDERING GUIDE
AD8309-EVAL
AD8309 evaluation board been carefully laid tested demonstrate specified high speed performance device. Figure shows schematic evaluation board. ordering information, please refer Ordering Guide. Links, switches, component settings different setups described Table
Package Description
Evaluation Board
INHI
COM2 VPS1
VLOG VPS2 PADL LMHI
(OPEN)
(OPEN)
VRSSI
0.01
LMHI
0.01
PADL INHI INLO PADL COM1
AD8309
52.3
(OPEN)
INLO
LMLO PADL FLTR
0.01
LMLO
0.01
ENABLE
ENBL
LMDR
Figure Evaluation Board Schematic
CAUTION (electrostatic discharge) sensitive device. Electrostatic charges high 4000 readily accumulate human body test equipment discharge without detection. Although EVAL-AD8309EB features proprietary protection circuitry, permanent damage occur devices subjected high energy electrostatic discharges. Therefore, proper precautions recommended avoid performance degradation loss functionality.
REV.
Information furnished Analog Devices believed accurate reliable. However, responsibility assumed Analog Devices use, infringements patents other rights third parties that result from use. license granted implication otherwise under patent patent rights Analog Devices. Trademarks registered trademarks property their respective companies.
Technology Way, P.O. 9106, Norwood, 02062-9106, U.S.A. Tel: 781/329-4700 www.analog.com Fax: 781/326-8703 2003 Analog Devices, Inc. rights reserved.
EVAL-AD8309EB
Table Evaluation Board Setup Options
Component
Function Device Enable. When position ENBL connected AD8309 normal operating mode. position ENBL connected connector labeled Enable. applied signal applied this connector enable/disable AD8309. left open, ENBL will float ground, putting device power-down mode. This used ac-couple ground single-ended input drive. drive AD8309 differentially, should removed. Input Interface. 52.3 resistor position along with create high-pass input filter whose corner frequency (640 kHz) equal 1/(pRC), where parallel combination 52.3 AD8309's input impedance 1000 Alternatively, 52.3 resistor replaced inductor form input matching network. Input Matching Network section AD8309 data sheet more details. Slope Adjust. simple slope adjustment implemented adding resistive divider VLOG output. whose should about never less than slope according equation: Slope mV/dB R4/(R3 R4). Limiter Output Coupling. ac-couple limiter's differential outputs. adjusting these values installing inductor output matching network implemented. Limiter Output Current. With installed, enables sets limiter output current. limiter's output current according equation (IOUT mV/R8). limiter current high disable limiter (recommended limiter being used), should removed. RSSI Bandwidth Adjust. addition will lower RSSI bandwidth VLOG output according equation: fCORNER 12.7 10-6/(CFILT pF).
Default Condition
R/L,
R/L= 52.3 0.01
R3/R4
Open 0.01 0.01 Installed.
Open
REV.
EVAL-AD8309EB
Figure Layout Signal Layer
Figure Signal Layer Silkscreen
Figure Layout Power Layer
Figure Power Layer Silkscreen
REV.
C03291-0-1/03(0)
PRINTED U.S.A.
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