FEATURES Wideband Switch: Absorptive/Reflective Switches High Isolatio
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Wideband, Isolation GHz, CMOS 1.65 2.75 Mux/SPDT Switches ADG918/ADG919
FEATURES Wideband Switch: Absorptive/Reflective Switches High Isolation GHz) Insertion Loss (0.8 GHz) Single 1.65 2.75 Power Supply CMOS/LVTTL Control Logic 8-Lead MSOP Tiny LFCSP Packages Power Consumption APPLICATIONS Wireless Communications General-Purpose Switching Dual-Band Applications High Speed Filter Selection Digital Transceiver Front Switch Switching Tuner Modules Antenna Diversity Switching FUNCTIONAL BLOCK DIAGRAMS
ADG918
CTRL
ADG919
CTRL
GENERAL DESCRIPTION
ADG918/ADG919 wideband switches using CMOS process provide high isolation insertion loss GHz. ADG918 absorptive (matched) switch having terminated shunt legs, while ADG919 reflective switch. These devices designed such that isolation high over frequency range. They have on-board CMOS control logic, thus eliminating need external controlling circuitry. control inputs both CMOS LVTTL
2.5V
compatible. power consumption these CMOS devices makes them ideally suited wireless applications generalpurpose high frequency switching.
PRODUCT HIGHLIGHTS
Isolation Insertion Loss Tiny 8-Lead MSOP/LFCSP Packages
-0.4 -0.6
-0.8
-1.0
INSERTION LOSS (dB)
-1.2 -1.4 -1.6 -1.8 -2.0 -2.2 -2.4 -2.6
ISOLATION (dB)
-2.8 -3.0
2.5V
-100
100k
100M FREQUENCY (Hz)
-3.2
100k
100M FREQUENCY (Hz)
Figure Isolation Frequency
Figure Insertion Loss Frequency
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.
1.65 input power noted.) ADG918/ADG919-SPECIFICATIONS1 specifications2.75 V,toGND =unless otherwise dBm,
Parameter ELECTRICAL CHARACTERISTICS Operating Frequency3 Frequency4 Input Power4 Insertion Loss
Symbol
Conditions
Version Typ2 1.25
Unit
S21, S21, S21, S11, S11, tOFF tRISE tFALL
Isolation-RFC RF1/RF2
Isolation-RF1 (Crosstalk) Return Loss Channel)4 Return Loss (Off Channel)4 ADG918 Switching Time4 Switching Time4 Rise Time4 Fall Time4 Compression4 Third Order Intermodulation Intercept Video Feedthrough5
Bias Bias MHz; MHz; 1000 MHz; 1000 1000 1000 1000 CTRL CTRL 1000 MHz/901 MHz,
ELECTRICAL CHARACTERISTICS Input High Voltage VINH VINH Input Voltage VINL VINL Input Leakage Current CAPACITANCE4 RF1/RF2, Port Capacitance CTRL Input Capacitance POWER REQUIREMENTS Quiescent Power Supply Current CCTRL
2.25 2.75 1.65 1.95 2.25 2.75 1.65 1.95 2.75
0.65 1.65 2.75 0.35
Digital inputs
NOTES Temperature range Version: -40°C +85°C. Typical values 25°C, unless otherwise stated. Point which insertion loss degrades Guaranteed design, subject production test. transience output port switch when control voltage switched from high high test setup, measured with rise time pulses bandwidth. Specifications subject change without notice.
REV.
ADG918/ADG919
ABSOLUTE MAXIMUM RATINGS
25°C, unless otherwise noted.)
-0.5 Inputs -0.5 Continuous Current Input Power Operating Temperature Range Industrial Version) -40°C +85°C Storage Temperature Range -65°C +150°C Junction Temperature 150°C MSOP Package Thermal Impedance 206°C/W
LFCSP Package Thermal Impedance (2-layer board) 84°C/W Thermal Impedance (4-layer board) 48°C/W Lead Temperature, Soldering sec) 300°C Reflow, Peak Temperature (<20 sec) 235°C
NOTES Stresses above those listed under Absolute Maximum Ratings cause permanent damage device. This stress rating only functional operation device these other conditions above those listed operational sections this specification implied. Exposure absolute maximum rating conditions extended periods affect device reliability. Only absolute maximum rating applied time. RF1/RF2 Port Inputs Ground -0.5
ORDERING GUIDE
Model ADG918BRM ADG918BRM-REEL7 ADG918BCP ADG918BCP-REEL7 ADG919BRM ADG919BRM-REEL7 ADG919BCP ADG919BCP-REEL7
*Contact factory availability.
Temperature Range -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C
Package Description Mini Small Outline Package (MSOP) Mini Small Outline Package (MSOP) Lead Frame Chip Scale Package (LFCSP) Lead Frame Chip Scale Package (LFCSP) Mini Small Outline Package (MSOP) Mini Small Outline Package (MSOP) Lead Frame Chip Scale Package (LFCSP) Lead Frame Chip Scale Package (LFCSP)
Package Option RM-8 RM-8 CP-8* CP-8* RM-8 RM-8 CP-8* CP-8*
Branding
CAUTION (electrostatic discharge) sensitive device. Electrostatic charges high 4000 readily accumulate human body test equipment discharge without detection. Although ADG918/ADG919 features proprietary protection circuitry, permanent damage occur devices subjected high energy electrostatic discharges. Therefore, proper precautions recommended avoid performance degradation loss functionality.
CONFIGURATION 8-Lead MSOP (RM-8) 8-Lead LFCSP (CP-8)
CTRL
FUNCTION DESCRIPTIONS
Mnemonic
Function Power Supply Input. These parts operated from 1.65 2.75 should decoupled GND. CMOS Logic Level; Ground Reference Point Circuitry Part COMMON Port Switch Port Port
ADG918/ ADG919
VIEW (Not Scale)
CTRL
Table Truth Table
CTRL
Signal Path
REV.
ADG918/ADG919
TERMINOLOGY
Parameter CTRL VINL VINH IINL (IINH) tOFF tRISE tFALL Isolation
Description
Most positive power supply potential Positive supply current Ground reference Logic control input Maximum input voltage Logic Minimum input voltage Logic Input current digital input Digital input capacitance Delay between applying digital control input output switching Delay between applying digital control input output switching off. Rise time. Time signal rise from level. Fall time. Time signal fall from level. attenuation between input output ports switch when switch control voltage condition. Insertion Loss attenuation between input output ports switch when switch control voltage condition. compression point. input power level which switch insertion loss increases over level value. measure much power switch handle before insertion loss increases Third order intermodulation intercept. This measure power false tones that occur when closely spaced tones passed through switch, whereby nonlinearity switch causes these false tones generated. Return Loss amount reflected power relative incident power port. Large return loss indicates good matching. measuring Return Loss VSWR calculated from conversion charts. VSWR (voltage standing wave ratio) indicates degree matching present switch port. Video Feedthrough Spurious signals present ports switch when control voltage switched from high high without signal present.
REV.
Typical Performance Characteristics-ADG918/ADG919
-0.2 -0.4 -0.6 -0.8 -1.0 -1.2 -1.4 -1.6 -1.8 -2.0 -2.2 -2.4 -2.6 -2.8 -3.0 -3.2
-0.30 -0.35 2.5V 2.75V
INSERTION LOSS (dB)
2.25V
2.5V
INSERTION (dB)
-0.40
-0.45 -0.50 -0.55 -0.60 -0.65 -0.70 2.25V
2.75V
100k 100M FREQUENCY (Hz)
-0.75 -0.80
100k 100M FREQUENCY (Hz)
-0.2 -0.4 -0.6 -0.8 1.8V 1.65V -1.0 -1.2 -1.4 -1.6 -1.8 -2.0 -2.2 -2.4 1.95V -2.6 -2.8 -3.0 -3.2 100k 100M FREQUENCY (Hz)
INSERTION LOSS (dB)
Insertion Loss Frequency over Supplies (RF1/RF2, S12, S21)
Insertion Loss Frequency over Supplies (RF1/RF2, S12, S21) (Zoomed Plot)
Insertion Loss Frequency over Supplies (RF1/RF2, S12, S21)
-0.2 -0.4 -0.6 -0.8 -1.0 -1.2 -1.4 -1.6 -1.8 -2.0 -2.2 -2.4 -2.6 -2.8 2.5V -3.0 -3.2 100k 100M FREQUENCY (Hz)
1.65V 2.75V
1.65V 2.75V
INSERTION LOSS (dB)
ISOLATION (dB)
ISOLATION (dB)
-100 100k
100M FREQUENCY (Hz)
100k
100M FREQUENCY (Hz)
Insertion Loss Frequency over Temperature (RF1/RF2, S12, S21)
Isolation Frequency over Supplies (RF1/RF2, ADG918)
Isolation Frequency over Supplies (RF1/RF2, ADG919)
2.5V
ISOLATION (dB)
2.5V
RETURN LOSS (dB)
(-40 (-40 100k 100M FREQUENCY (Hz) (+85
SWITCH
(+25
-100
100k
100M FREQUENCY (Hz)
X-TALK (dB)
SWITCH (ADG918)
2.5V 100k 100M FREQUENCY (Hz)
Isolation Frequency over Temperature (RF1/RF2, ADG919)
Return Loss Frequency (RF1/RF2, S11)
Crosstalk Frequency (RF1/RF2, S12, S21)
REV.
ADG918/ADG919
CTRL 1V/DIV 100mV/DIV 100mV/DIV TRISE 6.1ns TFALL 6.1ns
500mV
CH2/3
CTRL
(dBm)
2.002mV 10.0ns
2.5V FREQUENCY (MHz)
Switch Timing
Video Feedthrough
Frequency
P-1dB (dBm)
1000 1250 1500 FREQUENCY (MHz) 2.5V
P-1dB Frequency
REV.
ADG918/ADG919 Test Circuits*
ADG919
VOUT
VOUT VCTRL VOUT
NETWORK ANALYZER
CTRL
CTRL
VCTRL
INSERTION LOSS 20log VOUT
Test Circuit Switching Timing: tON, tOFF
Test Circuit Insertion Loss
ADG919
NETWORK ANALYZER
VOUT VCTRL CTRL VOUT
CTRL VOUT
VCTRL
VOUT
RISE
FALL
CROSSTALK 20log
Test Circuit Switch Timing: tRISE, tFALL
Test Circuit Crosstalk
ADG919
VOUT
ADG919
OSCILLOSCOPE
CTRL
NETWORK ANALYZER
VCTRL
CTRL
VCTRL
ISOLATION 20log VOUT
Test Circuit Isolation
Test Circuit Video Feedthrough
*Similar setups ADG918. REV.
ADG918/ADG919
ADG919
SOURCE
ADG919
SPECTRUM ANALYZER
COMBINER
SPECTRUM ANALYZER
SOURCE
CTRL
CTRL SOURCE
VCTRL
VCTRL
Test Circuit
Test Circuit P-1dB
REV.
ADG918/ADG919
APPLICATIONS Filter Selection
ADG918/ADG919 ideal solutions power, high frequency applications. insertion loss, high isolation between ports, distortion, current consumption these parts make them excellent solutions many high frequency switching applications. most obvious application transmit/receive block, shown wireless metering block diagram Figure Other applications include switching between high frequency filters, generator, generator, antenna diversity switch many tuner modules.
Absorptive Reflective
ADG919 used demultiplex switch high frequency signals between different filters also multiplex signal output.
RFIN
ADG919
ADG919
RFOUT
Figure Filter Selection
ADG9xx EVALUATION BOARD
ADG918 absorptive (matched) switch with terminated shunt legs, ADG919 reflective switch with terminated shunts ground. ADG918 absorptive switch good VSWR each port, regardless switch mode. absorptive switch should used when there need good VSWR that looking into port passing through signal common port. ADG918 therefore ideal applications that require minimum reflections back source. also ensures that maximum power transferred load. ADG919 reflective switch suitable applications where high port VSWR does matter switch some other desired performance feature. used many applications, including high speed filter selection. most cases, absorptive switch used instead reflective switch, vice versa.
Wireless Metering
ADG9xx evaluation board allows designers evaluate high performance wideband switches with minimum effort. prove that these devices meet user's requirements, user only requires power supply network analyzer along with evaluation board. application note available with evaluation board gives complete information operating evaluation board. port (see Figure connected through transmission line left connector connected through transmission lines connectors respectively. through transmission line connects this transmission line used estimate loss over environmental conditions being evaluated. board constructed 4-layer, material with dielectric constant overall thickness 0.062 inches. ground layers with grounded planes provide ground transmission lines. transmission lines were designed using coplanar waveguide with ground plane model using trace width 0.052 inches, clearance ground plane 0.030 inches, dielectric thickness 0.029 inches, metal thickness 0.0014 inches.
ADG918 used wireless metering applications. used conjunction with ADF7020 transceiver utility metering transceiver application, providing required isolation between transmit receive signals. SPDT configuration isolates high frequency receive signal from high frequency transmit.
ANTENNA
ADG918
TX/RX SWITCH
Figure Wireless Metering
Tuner Modules
ADG918 used tuner module switch between cable input off-air antenna. This part also ideal antenna diversity switch, switching different antenna tuner.
Figure ADG9xx Evaluation Board View
ADG918/ ADG919 TUNER
ANTENNA CABLE
Figure Tuner Modules
REV.
ADG918/ADG919
OUTLINE DIMENSIONS 8-Lead Mini Small Outline Package [MSOP] (RM-8)
Dimensions shown millimeters
3.00
3.00
4.90
0.65 0.15 0.00 0.38 0.22 COPLANARITY 0.10 1.10 0.80 0.60 0.40
0.23 0.08 SEATING PLANE
COMPLIANT JEDEC STANDARDS MO-187AA
8-Lead Lead Frame Chip Scale Package [LFCSP] Body (CP-8)
Dimensions shown millimeters
0.50 0.40 0.30 INDICATOR 0.45 INDICATOR
3.00
0.60
VIEW
2.75 0.50 0.25 0.05 0.02
BOTTOM VIEW
1.50
1.90 1.75 1.60
0.90 0.85 0.80
0.80 0.65
1.60 1.45 1.30
SEATING PLANE
0.30 0.23 0.18
0.20
-10-
REV.
-11-
-12-
C03335-0-8/03(0)
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