Analog Devices Solutions Bulletin CONVERT channels receive p
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ANALOG DEVICES' SOLUTIONS BULLETINS GLANCE Power Management Communications Converters Interface Amplifiers Industrial High Speed Converters Switches/Muxes/References High Speed Linear Video/Imaging Instrumentation
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APPLICATIONS COMMUNICATIONS PRODUCTS INCLUDED THIS BULLETIN:
basestations wireless local loop wideband CDMA transmitter power measurement receiver signal strength indication cost radar sonar signal processing direct detector cellular telephones battery powered systems
WIRELESS
Move Signal Chain with Analog's Newest Family 12-Bit ADCs
direct applications receive must have high input bandwidth, well excellent distortion noise performance, ensure that incoming signal accurately recovered. Compared traditional superheterodyne-based architectures, direct sampling offers significant advantages terms cost savings, flexibility performance. AD6640, AD9224 AD9225 newest entries Analog Devices' line single supply 12-bit ADCs specifically designed meet needs direct sampling receivers. Their high sample rates high input bandwidth matched critical communications standard rates MHz). These parts provide unmatched performance industry, making them suitable wide range other applications. high input frequency bandwidth with excellent performance direct sampling undersampling applications 12-bit, MSPS converters cost savings over traditional multiple stage receivers
MULTIPLE RECEIVER
DIRECT RECEIVER
FILTER
FILTER
FILTER
DETECTOR
PROCESS
FILTER
FILTER
AD6640 AD9224 AD9225 AD6600
ASIC
AD6620
FIGURE
FIGURE
APPLICATIONS
AD6600 AD6620 AD6640 AD9224 AD9225 cellular/PCS basestations multichannel, multimode receivers ultrasound $35.00 $17.80 $39.60 $18.66 $15.35
Speed 1/10th Power. 12-bit Delivers 1.75 MSPS
AD7470/AD7472 10/12-bit pin-compatible successive approximation ADCs consume times less power than equivalent competitive devices. These externally clocked ADCs have speed power tailored 1.75 applications, consuming 1.75 with supply. They fully specified 5.25 operation consume just sleep mode. These parallel devices come 24-lead TSSOP SOIC. bits 1.75 bits 1.75 5.25 specified range
AD7472 12-BIT POWER/SPEED, 100kHz 1.7MHz
POWER (mW)
"SPEED WITH NEGLIGIBLE POWER!"
THROUGHPUT (MSPS)
APPLICATIONS
AD7470 AD7472 modems professional cellular radio basestations portable communications assistants telecomms test equipment $4.50 $6.65
MORE INFORMATION 5643
Comparing Receive Architecture
WIRELESS WIRELESS
AD7729 AD7720 have been designed receive path basestation. These chips perform analog-to-digital conversion receive signal. Figure shows architecture receive side basestation. receive path consists downconversion stages along with filtering analog-todigital conversion. There gain stage section. This gain stage automatic, i.e., gain constantly changing that signal presented near full-scale. Because receive transmit sections continuously active basestation, separate transmit receive chips prevents crosstalk problems.
Editorial
AD7729
10-BIT AUXDAC
DOWNCONVERTER
BASEBAND DOWNCONVERTER
SIGMA-DELTA MODULATOR
FILTER
NOISE AMPLIFIER
AUTOMATIC GAIN CONTROL
SIGMA-DELTA MODULATOR
FILTER
SYNTHESIZER
DIVERSITY RECEIVER
SYNTHESIZER
AD7729
DOWNCONVERTER
AUTOMATIC GAIN CONTROL
SIGMA-DELTA MODULATOR
FILTER
NOISE AMPLIFIER
SIGMA-DELTA MODULATOR
FILTER
BASEBAND DOWNCONVERTER
AD7729 contains analog-todigital converters (ADCs) that Figure simultaneously sample analog inputs. Each consists modulator followed filter. analog inputs, which sampled MHz, decimated filtered generate 15-bit digital words, output word rate being 270.83 (symbol rate). only external filtering needed first order antialias filter. ADCs share serial interface that eases transfer data from AD7729 DSP. addition, AD7729 contains auxiliary which used control gain stage section basestation. Figure shows typical basestation that uses AD7729.
DIVERSITY RECEIVER
10-BIT AUXDAC
RECEIVER CHANNEL
AD7720
IF-TO-BASEBAND DOWNCONVERTER RF-TO-IF DOWNCONVERSION CONSTANT GAIN EXTERNAL FILTER SIGMA-DELTA MODULATOR EXTERNAL FILTER SIGMA-DELTA MODULATOR DIGITAL FILTER ASIC
AD7720
DIGITAL FILTER ASIC
SYNTHESIZER
Figure
AD7729 dynamic range typically, which corresponds bits accuracy. This sufficient systems that automatic gain control receive path. some basestations, gain constant. such systems, with greater dynamic range needed that small signals detected converted. AD7720 suitable these systems, part having dynamic range greater than
AD7720 modulator that outputs single bitstream. input information contained output density ones. part does contain filter, this needs provided externally. However, noise floor modulator down from kHz. Figure shows baseband section basestation where AD7720 used. Figure shows frequency response AD7720. Figure Figure illustrate that AD7729 well AD7720 suitable basestations. However, choice which part depends basestation design.
FREQUENCY 393.295
Figure
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Complete Solution Converting Channels
WIRELESS
AD7729 provides complete solution converting channels receive path cellular basestations pager designs. part includes 15-bit ADCs with digital filters modulators, offset adjust other components signal chain, on-chip reference 10-bit auxiliary with independent serial port. Supply voltages from with normal sleep modes operation. complete function channel digitization baseband auxiliary serial ports power supplies
RECEIVER CHANNEL 10-BIT AUXDAC
INPUT
SIGMA-DELTA MODULATOR
FILTER
SIGMA-DELTA MODULATOR
FILTER
AD7729
APPLICATIONS
AD7729 basestations pagers collision avoidance systems $7.80
Integrated ADCs DACs Reduce Component Count
AD7339 integrated high speed MSPS, 8-bit ADC, 8-bit DACs, serial 8-bit DACs on-chip reference. this functionality housed 52-pin PQFP. Many systems require multiple DACs ADCs. AD7339 ideal baseband converter receive transmit signal chain. high speed digitize input DSP, high speed DACs used generate AD7339 transmit channel. 8-BIT parallel digital output each high REFERENCE DUPLEXER speed IDAC GAIN LEVEL parallel digital QDAC input bus. HIGH POWER AMPLIFIER serial DACs function auxiliary/voltage setting DACs. APPLICATIONS on-chip reference power-down capability single 52-pin PQFP
Throughput/Update Resolution AD7339 wireless local loops transceivers cellular basestations $7.85
High Speed DACs
Auxiliary DACs
MSPS Bits
Bits
Bits
MORE INFORMATION 5643
Quadrature Conversion Less than Half Space Less than Half Price
Whether you're designing wireless local loop, cellular base station, high speed modem, Analog Devices developed baseband quadrature conversion transmit receive solution specifically you. AD9761 AD9201 represent Analog Devices' latest 10-bit, dual, high speed converters designed meet ever-increasing demands various existing, well emerging, high performance wireless wireline technologies employing baseband quadrature modulation schemes. Such demands include wider dynamic range high update rates, lower power higher levels integration within very small package. AD9761, dual with integrated digital interpolation, well AD9201 and/or AD9281 dual ADCs with integrated input buffers, work team, dramatically reducing system complexity, space cost. You're guaranteed excellent gain, phase offset matching your system approaches ideal theoretical performance measured ENOB performance. Each product features interleaved digital interface, fitting neatly into space-saving 28-lead SSOP package. you're looking perfect amplifiers with modulators demodulators, Analog Devices most complete lineup anywhere. These amplifiers power, operate supplies, available surface-mount packages.
Gain Matching (dB)
WIRELESS WIRELESS
Bits
MSPS
ENOB*
AD9761 AD9201 AD9281
0.02 0.004 0.006
MHz/20 MSPS
AD6432 AD607 AD6458 AD6459
AD6121
REGISTER
AD9201
REGISTER
INTERLEAVED INTERFACE
LATCH
AD9761
LATCH
AD6122
APPLICATIONS
AD9201 AD9281 AD9761 AD607/AD6458/AD6459 AD6432 AD6121/AD6122 cellular basestations cellular handsets wireless local loop systems wireless data systems wideband CDMA $4.70* $3.76* $9.74* $4.85* $9.25* $4.00* *(10k volume)
AD6121 Single-conversion Receive 50-300 "Linear-in-dB" IS-95, W-CDMA AD6122 Single-conversion Transmit 50-300 "Linear-in-dB" IS-95, W-CDMA
AD607 Function Gain Control Range Dual-conversion Receive kHz-12 "Linear-in-dB" IS-136, WLL, TETRA, Satellite, Wireless Data
AD6458 Dual-conversion Receive 5-40 "Linear-in-dB" GSM, DCS1800, GSM1900
AD6459 Dual-conversion Receive 5-50 "Linear-in-dB" GSM, DCS1800, GSM1900
AD6432 Transceiver 10-50 "Linear-in-dB" GSM, DCS1800, GSM1900
Applications
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WIRELESS
Tired Dealing With Challenges Designing Analog Image-Rejection Filter Your Reconstruction DAC?
Consider TxDAC with Interpolation Filters!
images with very linear predictable response, also enhances DAC's inband dynamic range performance. interested benefits cost savings replacing your 5-to-7-pole filter with more cost effective, manageable 1-to-3-pole filter, consider AD9774. AD9774, 14-bit TxDAC with digital interpolation filters, just series integrated products designed simplify your analog system design without complicating your digital design. resolution, consider AD9761, 10-bit dual TxDAC with interpolation filters. Today's engineers often frustrated with additional cost, power consumption, board space, manufacturing headache aggravation associated with designing passive active analog filters. Complex multipole reconstruction filters must take into consideration effects cascaded active stages, limitations tolerances passive components frequency response, DACs sin(x)/x amplitude response. Featuring on-chip digital interpolation filter, this high performance oversampling answer every engineer's frustrations. digital interpolation filter only suppresses those nearby offensive
14-Bit NYQUIST DAC: fDATA fCLOCK 32MSPS, fOUT 5MHz, 6MHz
7-POLE RECONSTRUCTION FILTER
POWER
IMAGE
FREQUENCY
AD9774
INTERPOLATION: fDATA fCLOCK 32MSPS, fOUT 5MHz, 6MHz
3-POLE RECONSTRUCTION FILTER W/HIGHER
POWER
"SUPPRESSED" ORIGINAL IMAGE
FREQUENCY
APPLICATIONS
AD9774 spread spectrum multicarrier radios signal generation $24.95
newest most advanced member TxDAC family
MORE INFORMATION 5643
Lowering SFDR Floor Higher Frequencies Drives Wideband Performance Through Roof
Channel capacity demands requirement software configurable systems that support multiple standards wireless wideband communications systems force systems designers find high speed converters with better spectral performance wider dynamic range (i.e., more bits). Tailored demanding wideband applications, AD9754 improves SFDR performance over wider signal bandwidth improve multichannel CDMA channel packing, while lowering annoying error rate problems caused unwanted noise. AD9754 maintains SFDR over broad 10-15 band. less demanding applications, there 12-bit AD9752 10-bit AD9750 TxDAC®. pin-compatible, SFDR-enhanced version industry-standard AD976x TxDAC family better SFDR over wider output bandwidth 10-, 14-bit, MSPS family members power flexible digital interface
AD9750 AD9752 AD9754 AD9708 AD9760 AD9762 AD9764
DIRECT DIGITAL DIGITAL UPCONVERTER-"DUC" SERIAL INPUT DATA
0100.1000 DATA
WIRELESS WIRELESS
WIDEBAND ARCHITECTURE
"DUC"
"DUC"
"DUC"
APPLICATIONS
CDMA basestation transmit path, ADSL/HDSL/VDSL modem transmit path, frequency synthesis high speed instrumentation Contact Factory Price 3.82 8.50 $15.18 $19.18
Saves Cost Space Low-Noise Applications
anyCAPLDO high-performance cost, noise space-sensitive applications. Unlike traditional LDOs requiring tantalum capacitor stability, anyCAP family requires only single 0.47 multi layer ceramic capacitor. This enables smaller, cheaper capacitors thus provides more circuit-board space less expensive system solution. ultralow dropout voltage: mV/100
RIPPLE REJECTION
noise reduction feature: Hz-100 kHz) space-saving SOT-23 package option Thermal Coastline packaging SO-8 (dissipates more heat than standard SO-8)
0.47 3.3k 0.47 3.3k
high output accuracy: 1.4% over temperature, line load regulation shutdown current: noise: Hz-100 kHz)
ADP3300 ADP3301 ADP3302 ADP3303 ADP3307 ADP3308 ADP3309 ADP3310 SOT-23 SO-8 Dual SO-8 SO-8, TSSOP SOT-23 Replace LP2981 Replace LP2981 Controller
100k FREQUENCY
APPLICATIONS
cellular telephones scanners battery powered systems
COMPLETE TECHNICAL INFORMATION www.analog.com/bulletins/comms
"DUC"
SERIAL/ PARALLEL ENCODER DATA
VOUT
AD9752
AD9754
3.3V
WIRELESS
Unique Detector Streamlines Signal Chain
Combining advantages direct detection with those linear, wide range logarithmic amplifier, AD8313 detector converts signal input equivalent dB-scaled value output. AD8309 provides limiter output accurate phase detection applications, including CDMA GSM. Both AD8309 AD8313 accept modulated input full-wave rectify signal. With AD8313, operating frequency range means only coupler filter required prior device.
ANTENNA POWER AMPLIFIER ANALOG CONTROL LOOP (ALT)
COUPLER
FILTER ANTENNA
AD8313
INPUT
DIGITAL CONTROL LOOP
OUTPUT
AD8309
PHASE DETECT LIMITER OUTPUT
RSSI
APPLICATIONS
AD8309 AD8313 transmitter power measurement receiver signal strength indication cost radar sonar signal processing ASK/PSK amplifier/detector $7.75 $7.90
high bandwidth 0.1-2.5 input signal fast response time accuracy over
details more unique detection solutions, visit site
TRANSITION
High Speed Amplifiers Selection Guide
Single Part Number Dual Triple Quad Architecture Supply Voltage Rail-to-Rail MicroVF Buffer Pack BW@Acl Slew Rate Noise IS/AMP IOUT [MHz min] [nV/Hz] max] max] typ] typ] 1000 1400 1150 1200 3000 5500 1500 4.000 2250 2500 1300 1.85 2.75 16.5 15.5 Price (1K) [OEM $US] 0.85/1.60/2.85 0.85/1.60 0.85/1.60 1.50/1.95 2.75/2.50 3.95 1.59 1.25 1.19 2.14 1.30/1.95 2.85 4.51 2.75 2.51 4.12
Cost High Performance Amps AD8051 AD8052 AD8054 AD8055 AD5056 AD8057 AD8058 AD8072 AD8073 Fast Current Feedback Amps AD8001 AD8002 AD8004 AD8009 Very Power High Speed Amps AD8005 AD8014 AD8012 AD8031 AD8032 High Output Current Drive Amps AD811 AD815 AD8010 Very Noise High Speed AD829 Very Distortion High Speed AD9631
MORE INFORMATION 5643
Distortion High Output xDSL Applications
Inherent inefficiencies ADSL signal, defined ANSI spec T1.413, pose difficulties line drive circuitry design. Analog Devices offers solutions make this other ADSL design challenges easier.
Editorial
design (despite potential output currents) faster technology that enables lower bias currents without sacrificing bandwidth (distortion performance). AD8016, second generation, dual line drive amplifier, does just that. marries expertise distortion, high output voltage design with high speed, bipolar process technology called XFHV. This technology dramatically decreases total power dissipation just (static dynamic) while enabling AD8016 deliver distortion into load, with Vp-p signals power supply. This significantly improves efficiency drive amplifiers when compared existing solutions vintage processes that dissipate more. have neglected Customer Premise Equipment (CPE) line. Output drive even more critical when reduce power supplies further, PC-based applications. we've applied same output design techniques cost, power pair drive amplifiers called AD8017. AD8017 runs anywhere from supplies, capable driving within rail, while providing output current impedance load. Packaged ADI's 8-lead, thermally enhanced SOIC package, AD8017 hits price/performance target PCbased modern designs.
WIRED WIRED
Because specified signal ADSL nature pseudo-random, dynamic headroom allowance must made allow discrete probability that phase alignment will result peak-topeak signal, differentially output pair drive amplifiers. Maintaining this peak-to-average ratio, "crest factor" 5.3, requires high dynamic headroom. This headroom, overhead between power supply voltage amplitude where signal spends most time, causes inefficiency voltage drop across output transistors drive amplifier. standing current these output devices dissipated drive amplifier package, delivered line. higher output voltages, these output devices themselves require headroom deliver distortion-free signal, power dissipation situation obviously worsens. most straightforward reduce power dissipation lower power supplies. under these conditions, however, requires combination distortion-free, high output voltage
more line driving solutions, visit www.analog.com/bulletins/comms
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WIRED
High Power Differential Drivers Ideal Subscriber Line Interfaces ADSL
AD815 designed move high speed signals into impedance loads. high current drivers deliver minimum each MHz. With differential configuration, output swing supplies. harmonic distortion, wide bandwidth high current drive makes this ideal communications applications such subscriber line interfaces ADSL, HDSL VDSL. AD816 consists high current drivers noise amplifiers. Suitable drivers receivers telecommunications applications such ADSL, also used high resolution monitors. high output drive differential output available 15-lead SIPs surface mount, 24-lead SOIC packages (AD815 only)
DIFFERENTIAL DRIVER DOWNSTREAM TRANSMITTER DIFFERENTIAL DRIVER AD815 FILTER UPSTREAM RECEIVER RECEIVE HYBRID TELEPHONE POTS
AD816
APPLICATIONS
AD815 AD816 ADSL, HDSL VDSL interface convergence astigmatism adjustment coil transformer driver $4.51 $7.25
Wide Bandwidth, Distortion High Output Current Driver Under
challenging high speed designs that demand high output current distortion without sacrificing other specs, check AD8012. This dual amplifier ideal applications requiring high performance with minimal power consumption. power high output current, good video specs available 8-lead SOIC 8-lead SOIC APPLICATIONS
AD8012 IOUT (mA) Highest Harmonic MHz, (mA) (MHz) Diff Gain/Diff Phase (%/°) mA/amp .02/.06 AD8012 xDSL line interface buffer amplifiers imaging systems digital cameras ultrasound equipment $2.14
MORE INFORMATION 5643
Variable Gain Line Driver Ideal Coaxial Cable Line Driving Applications
AD8320 digitally-controlled variable-gain amplifier optimized coaxial cable line driving applications requiring distortion. constant output impedance during power-up powerdown conditions eliminates need output transformer, resulting solution cost savings. AD8320 input impedance accepts single-ended input signal with specified analog input level 0.310 p-p. Linear gain response excellent distortion response among characteristics. operates from single supply 8-bit serial gain control APPLICATIONS
AD8320 coaxial cable driver telephony high speed data systems interactive set-top boxes plug-in modems $7.40
WIRED WIRED
through
gain range SFDR output SFDR output
Reduce Power Consumption Board Space. with Integrated Consumes Less than
range Direct Digital Synthesis products from Analog Devices have taken complexity designing with DDS. longer necessary spend time selecting interfacing appropriate digital synthesis this family parts integrated optimized CMOS on-chip. newest family with this integrated approach AD9832 AD9835 only reduces board space also reduces power consumption compared discrete solutions. With 32-bit phase accumulator, frequency resolution controlled part billion. With clock, resolution 0.005 attained.
DVDD DGND AVDD AGND REFOUT ADJUST REFIN
MCLK
AD9832
PHASE ACCUMULATOR (32-BIT)
ON-BOARD REFERENCE
FULL-SCALE CONTROL
COMP
FSELECT
FREQUENCY REGISTERS
AD9832/AD9835 also include four phase registers frequency registers. These registers preloaded then easily selected serial interface appropriate pins. power supply
10-BIT
IOUT
FOUR PHASE REGISTERS
on-chip SINE look-up table serial loading power-down option
PSEL0 PSEL1
16-BIT DATA REGISTER
CONTROL REGISTERS
SERIAL REGISTER
FSYNC
SCLK
SDATA
APPLICATIONS
AD9832 AD9835 local oscillator applications medical imaging digital demodulation instrumentation $5.00 $5.75
Clock Rate SFDR Power Cons. Package
AD9832 Bits typ. 16-TSSOP
AD9835 Bits typ. 16-TSSOP
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