Medical Applications Guide (Rev. B - Mouser Electronics

Medical ImagingMagnetic Resonance Imaging (MRI)61➔16-Bit, 10MSPS Delta-Sigma ADCs for ScientificInstrumentationADS1605, ADS1610Get samples, datasheets, evaluation modules and app reports at:www.ti.com/ADS1610 or www.ti.com/sc/device/ADS1605The ADS1610 delta-sigma topology provides key system-level designadvantages with respect to anti-aliasing filtering and clock jitter.Output data is supplied over a parallel interface and easily connectsto TMS320 DSPs. The power dissipation can be adjusted with anexternal resistor, allowing for reduction at lower operating speeds.Key Features• Output data rate: 10MSPS (ADS1610), 5MSPS (ADS1605)• Signal bandwidth: 4.9MHz• SNR: 86dBFS• THD: –94dBS• SFDR: 95dB• On-chip digital filter simplifies anti-alias requirements• Low group delay: 3µs• Parallel interface• Direct connection to TMS320 DSPs• Packaging: TQFP-64Applications• Scientific instruments• Test equipment• CommunicationsAINPAINNAVDDVREFPADS1610VREFNΔΣModulatorVMID RBIAS VCAPBias CircuitsDigitalFilterDVDDParallelInterfacePDSYNCCLKCS2xMODERDDRDYOTRDOUT[15:0]16-Bit, 500MSPS, 2x to 8x Interpolating,Dual-Channel DACDAC5687Get samples, datasheets, evaluation modules and app reports at:www.ti.com/sc/device/DAC5687The DAC5687 is a dual-channel, high-speed DAC with integrated2x, 4x and 8x interpolation filters, a complex numerically controlledoscillator (NCO) and offers superior linearity, noise, crosstalk and PLLphase noise performance. The DAC5687 has six signal processingblocks: two interpolate-by-two digital filters, a fine frequency mixer, aquadrature modulation compensation block, a coarse frequency mixerwith fs/2 or fs/4. The coarse and fine mixers can be combined to spana wider range of frequencies with fine resolution. Other featuresinclude several input options such as single-port interleaved data, evenand odd multiplexing at half-rate and an input FIFO with either internalor external clock to ease the input timing ambiguity when the IC isclocked at the DAC output sample rate.Key Features• Selectable 2x - 8x interpolation• On-chip PLL/VCO clock multiplier• Full I Q compensation including offset, gain and phase• Complex mixer with 32-bit NCO• I/O voltage: 1.8V or 3.2V• On-chip reference: 1.2V• Differential scalable output: 2mA to 20mA• Flexible input options:• FIFO with latch on external or internal clock• Even/odd multiplexed input• Single port demultiplexed inputApplications• Video and imaging• Cable-modem termination systems• Cellular base stationsCLKVDD CLKGND LPF PLLGND PLLVDD PHSTR SLEEP DVDD DGNDAGNDADS1610 functional block diagram.DGNDCLK1CLK1CCLK2CLK2CPLLLOCKDA[15:0]DB[15:0]TXENABLERESETBQFLAGInput FIFO/ReorderMux/DeMuxFIR1x2x2SIFInternal Clock Generationand2x-8x PLL Clock MiltiplierFIR2x2x2Fine Mixercos sinNCOQuadrature ModCorrection (QMCFIR3x2x22x-8xf DATACourse Mixer:fs/2 or fs/4FIR4xsin(x)xsin(x)1.2VReferenceA AOffset Gain16-bitDAC16-bitDACBOffsetBGain100-Pin HTQFPEXTIOEXTLOBIASJIOUTA1IOUTA2IOUTB1IOUTB2IOGNDIOVDDSDIO SDO SDENB SCLKAVDDAGNDDAC5687 functional block diagram.Texas Instruments 2Q 2007Medical Applications Guide