Medical Applications Guide (Rev. B - Mouser Electronics

Medical ImagingDigital X-Ray67➔16-Bit, 4MSPS, Fully Differential Input ADC withParallel Interface and ReferenceADS8422Get samples, datasheets, evaluation modules and app reports at:www.ti.com/ADS8422The ADS8422 is a 16-bit, 4MSPS ADC with internal 4.096V referenceand a fully differential, pseudo-bipolar input. It includes a full 16-bitinterface and an 8-bit option where data is read using two 8-bit readcycles if necessary. It is characterized over the industrial –40°C to+85°C temperature range.Key Features• Fully differential input with pseudo-bipolar input range: –4V to +4V• 16-bit NMC at 4MSPS• INL: 1LSB (typ)• SNR: 92dB• THD: –102dB (typ) with 100kHz input• Internal 4.096V reference and reference buffer• High-speed parallel interface• Low power: 155mW at 4MHz (typ)• Flexible power-down scheme• REF IN /2 available for setting analog input common-mode voltageApplications• Medical instruments• Instrumentation• Spectrum analysis• High-speed, high-resolution, zero-latency data acquisition systemsHigh-Speed, Low-Noise, Fully Differential I/OAmplifiersTHS4130, THS4131Get samples, datasheets, evaluation modules and app reports at:www.ti.com/sc/device/THS4130, www.ti.comsc/device/THS4131The THS4130 and THS4131 are fully differential input/differentialoutput amplifiers with a true fully differential signal path from input tooutput. This design provides excellent common-mode noise rejectionand improved total harmonic distortion.Key Features• Bandwidth: 150MHz (–3dB, V CC = ±15V)• Slew rate: 51V/µs• THD 3 at 250kHz: –100dB• Low noise: 1.3nV/ Hz input referred noise• Differential input/differential output:• Balanced outputs reject common-mode noise• Reduced second harmonic distortion due to differential output• Wide power supply range:• Single supply: V CC = 5V• Dual supply: ±15V• Packaging: SOIC-8, MSOP-8, MSOP-8 PowerPADApplications• Single-ended to differential conversion• Differential ADC driver• Differential antialiasing• Output level shifter• Differential transmitter and receiver+IN–INCOMMOUTREFINREFOUT1/ 2CDAC4.096-VInternal ReferenceSARComparatorClockOutputLatchesand3-StateDriversConversionandControl LogicBYTE16-/8-bitParallel DataOutput BusPD2RESET/PD1CONVSTBUSYCSRDV IN–20Typical A/D Application Circuit5VV OCMV DDAV DD DV DDA INA IN AV SS V REF DigitalOutputTotal Harmonic Distortion vs. FrequencyADS8422 functional block diagram.THD (dB)–30 V OUT = 2V PP–40–50–60 VCC = 5V to ±5V–70–80–90–100100k 1kV CC = ±15V10kFrequency (Hz)THS4130 application circuit.Texas Instruments 2Q 2007Medical Applications Guide