Medical Applications Guide (Rev. B - Mouser Electronics

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62➔Medical ImagingMagnetic Resonance Imaging (MRI)Wideband Operational TransconductanceAmplifierOPA861Get samples, datasheets, evaluation modules and app reports at:www.ti.com/sc/device/OPA861The OPA861 is a wideband, bipolar operational transconductanceamplifier (OTA). The OTA or voltage-controlled current source can beviewed as an ideal transistor. Like a transistor, it has three terminals— a high-impedance input (base), a low-impedance input/output(emitter), and the current output (collector). The OPA861, however,is self-biased and bipolar. The output collector current is zero for azero base-emitter voltage. AC inputs centered about zero produce anoutput current, which is bipolar and centered about zero. Thetransconductance of the OPA861 can be adjusted with an externalresistor, allowing bandwidth, quiescent current and gain trade-offsto be optimized.Key Features• Wide bandwidth: 80MHz, open-loop, G = +5• High slew rate: 900V/µs• High transconductance: 95mA/V• External I Q -control• Low quiescent current: 5.4mATMS320C64x DSP Generation, Fixed-PointHigh-Performance and Performance-Value DSPsTMS320C6415Get samples, datasheets, evaluation modules and app reports at:www.ti.com/sc/device/TMS320C6415The TMS320C6415 digital signal processor (DSP) is a member ofTI’s TMS320C64x generation. The TMS320C64x generation offersa portfolio of high-performance DSPs integrated with peripheralstailored to a broad spectrum of applications. The TMS320C6415 isthe industry’s first 1GHz DSP on a 90nm process node and offers100% upward object code compatibility within the C6000 DSPfamily. It has an easy-to-use integrated development environmentwith an exceptional optimizing C compiler.Key Features• VelociTI.2 architecture extensions with new instructions toaccelerate performance in key applications• Increased parallelism with quad 16-bit and octal 8-bit multiplyaccumulate performance• Improved orthogonality with frequently used instructions availablein more functional units• Double the bandwidth resulting from more registers, widerload/store data paths and enlarged 2-level cacheApplications• Video equipment• Communications• High-speed data acquisition• Wideband LED drivers• Control-loop amplifiers• Wideband active filters• Line driversV INC 1RRC 2V OUTApplications• Imaging (medical, machine vision/inspection, defense/radar/sonar)L1P Cache16KBytesC64xDSP CoreL1D Cache16KBytesI2 Cache Memory 512 KBytesEnhanced DMA ControllerVCPMcBSP0McBSP1McASP0McASP1I2CI2CHPI 32Timer 0/1/2Low-pass Negative Impedance Converter (NIC) filter.OSCGPIO 16EMIF32Gain (dB)0–10–20–3010MHz–40Low-Pass Filter20MHz–50 Low-Pass Filter–60–70–801k 10k 100k 1M 10M 100M 1GFrequency (Hz)Frequency response of 20kHz and 10MHz low-pass NIC filters.TMS320C6415 functional block diagram.Medical Applications Guide Texas Instruments 2Q 2007
Medical ImagingComponent Recommendations for MRI Applications63➔Component RecommendationsComponent Description Key Features Benefits Other TI SolutionsAmplifiersOPA861 Transconductance Amp 80MHz, open-loop, G = +5 BW, 900V/µs SR 95mA/V high transconductance, 5.4mA I QTHS4503 High-Speed Op Amp 370MHz BW, 3700V/µs SR, 5V, ±5V, 12V and 15V supply Low distortion, fully differential THS4504, THS4141THS9000 Cascadeable Amp 50MHz to 400MHz, 50Ω input/output impedance High dynamic range, single supplyData ConvertersADS1610 Delta-Sigma ADC 16-bit, 10MSPS, parallel interface SYNC pin for simultaneous sampling ADS1605ADS5423 High-Speed ADC 14-bit, 80MSPS, 74dBc at 80MSPS and 50MHz IF SNR 3.3V CMOS-compatible outputs, ADS5424, ADS54332s-complement output formatADS5500 High-Speed ADC 14-bit, 125MSPS, 71.2dBFS at 100MHz f IN SNR Serial programming interfaceADS5545 High-Speed ADC 14-bit, 170MSPS, DDR LVDS/CMOS outputs Programmable output clock position to ADS5546, ADS5547ease data captureADS5547 High-Speed ADC 14-bit, 210MSPS, user-selectable DDR LVDS or CMOS High performance ADS5545, ADS5546parallel outputsADS6425 High Speed ADC 4 channel, 12-bit, 125MSPS, serial LVDS interface, High performance, multiple input option1.65W total powerDAC5672 High-Speed DAC 14-bit, 275MSPS dual DAC High sample rate with low power DAC5662,DAC5652DAC5687 High-Speed DAC 16-bit, 500MSPS interpolating with NCO Digital integration and superior AC performance for DAC5686flexible application and high quality transmissionDAC904 High-Speed DAC 14-bit, 165MSPS DAC Low-power DACDAC7725 V OUT DAC Quad, 12-bit, 250mW (max) power, 10µs to 0.012% Double-buffered data inputs DAC7724, DAC902, DAC900settling timeReferencesREF31xy Voltage Reference 0.2% voltage accuracy Precise trigger voltage ADC REF32xy, REF33xyREF32xx Low Drift, Bandgap 0.2% (max) accuracy, 7ppm/°C (max) drift, 0.1mA (max) I Q Multiple output voltages, SOT23-6REF33xx microPower Bandgap 0.1% (max) accuracy, 30ppm/°C (max) drift, 0.005mA (max) I Q Multiple output voltages, MSOP-8, SO-8REF50xx Precision Reference 0.05% accuracy, 3ppm/°C (max) drift, 6µV PP low noise Multiple output voltages, SC71ProcessorsTMS320C- DSP 1GHz, C64x core High-performance fixed-point DSP TMS320C6414, TMS320C6455,6415TBTMS320C6454, TMS320C6701TMS320F2808 Digital Signal Controller 100MIPS, 8KB ROM, 36KB RAM, 128KB Flash, 12-bit ADC I 2 C, 4 SPI, 2 SCI, 2 CANTMS320F28015 Digital Signal Controller 60MIPS, 8KB ROM, 12KB RAM, 32KB Flash, 12-bit ADC I 2 C, 1 SPI, 1 SCITMS320F2812 Digital Signal Controller 150MIPS, 8KB ROM, 36KB RAM, 256KB Flash, 12-bit ADC McBSP, 1 SPI, 2 SCI, 1 CANInterfaceSN65MLVD128 1:8 Fanout Buffer 200Mbps Standardized M-LVDS SN65MLVD2TB5R1 4-Channel PECL Receiver 400Mbps Replaces Agere parts SN65LVP20ClockingCDCE706 Clock Generator Programmable clock synthesizer Universal ratio multiplier and divider CDCE906CDCLVD110A Clock Buffer 1:10 LVDS clock driver Operating up to 900MHz with minimum skew CDCLVP110, CDCP1803CDCM7005 Clock Synthesizer Clock synchronizer with LVPECL and LVCMOS output Jitter cleaning CDC7005CDCP1803 Clock Buffer Distributes one differential input to 3 LVPECL outputs Accepts any differential signal input CDCLVP110, CDCLVD110ADigital Up/Down ConvertersGC5016 Digital Up/Down Quad, 160MSPS for 4 channels, 115dB SFDR Many multiplex output optionsConverterGC5018 Digital Down Converter 8-channel, real or complex DDC inputs, 115dB SFDR NCO Final ACGPreview products are listed in bold blue.New products are listed in bold red.Texas Instruments 2Q 2007Medical Applications Guide
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Medical Applications Guide (Rev. B - Mouser Electronics

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