Medical Applications Guide (Rev. B - Mouser Electronics

Medical InstrumentsMedical Instrumentation77➔24-Bit, ADC with Excellent AC and DCPerformanceADS1271Get samples, datasheets, evaluation modules and app reports at:www.ti.com/ADS1271The ADS1271 is a 24-bit, delta-sigma ADC with up to 105kSPS datarate. It offers the unique combination of excellent DC accuracy andoutstanding AC performance. The high-order, chopper-stabilizedmodulator achieves very low drift with low in-band noise. The onboarddecimation filter suppresses modulator and signal out-of-band noise.The ADS1271 provides a usable signal bandwidth up to 90% of theNyquist rate with only 0.005dB of ripple.Key Features• AC performance: 109dB SNR (52kSPS); 105dB THD• DC accuracy: 1.8mV/°C offset drift; 2ppm/°C gain drift• High resolution: 109dB SNR• Easy synchronization for multi-channel data acquisition• Daisy-chain support to simplify data retrieval when using multipleICsApplications• Outstanding resolution when measuring from DC to 50kHz signalsAINPAINNVREFP VREFN AVDD DVDD∆ΣModulatorAGNDADS1271 functional block diagram.DigitalFilterControlLogicSerialInterfaceDGNDSYNC/PDWNMODECLKDRDY/FSYNCSCLKDOUTDINFORMAT16-Bit, 2MSPS ADC with LVDS Serial InterfaceADS8410Get samples, datasheets, evaluation modules and app reports at:www.ti.com/sc/device/ADS8410The ADS8410 is a 16-bit, 2MSPS ADC with 4V internal reference. Itincludes a 200Mbps, LVDS serial interface design to support daisychaining or cascading of multiple ICs. A selectable 16-/8-bit dataframe mode enables the use of a single-shift register chip forconverting the data to parallel format. The ADS8410 unipolar singleendedinput range supports a differential input swing of 0V to +V REF .Key Features• SNR: 87.6db at 10kHz I/P• THD: –98dB at 10kHz I/P• INL: ±1LSB (typ); ±2.5LSB (max)• DNL: +0.8/–0.5LSB (typ); +1.5/–1LSB (max)• Unipolar differential input range: 0V to 4V• 200Mbps LVDS serial interface• 16-/8-bit data frame• Zero latency at full speed• Power dissipation: 290mW at 2MSPS• Packaging: QFN-48Applications• Medical instrumentation• High-speed data acquisition systems• High-speed close-loop systems• Communications+IN–INREFINREFOUTCDAC+VA AGND +VBDCore SupplySARComparatorClock4V InternalReferenceConversionandControlLogicBDGNDI/O SupplyLVDS I/OCMOS I/OModeSelectionCSTARTSYNC_O_CLK–O, SDOSYNC_I, CLK_I, SDICONVSTBUS BUSYRDBUSYCSLAT_Y/NBYTE,MODE_C/D,CLK_I/E, PD, NAPADS8410 functional block diagram.Texas Instruments 2Q 2007Medical Applications Guide