AD7761 Datasheet | Analog Devices

FEATURES Linear phase digital filter Precision ac and dc performance 8-channel simultaneous sampling 256 k SPS ADC ODR per channel 97.7 d B dynamic range 110.8 k Hz input bandwidth (- 3 d B BW) - 120 d B THD, typical ±1 LSB INL, ±1 LSB offset error, ±5 LSB gain error Optimized power dissipation vs. noise vs. input bandwidth Low latency sinc5 filter Wideband brick wall filter: ±0.005 d B ripple to 102.4 k Hz Analog input precharge buffers Power supply AVDD1 = 5 V, AVDD2 = 2.25 V to 5.0 V IOVDD = 2.5 V to 3.3 V or IOVDD = 1.8 V 64-lead LQFP package, no exposed pad Temperature range: - 40°C to +105°C Selectable power, speed, and input bandwidth Fast (highest speed): 110.8 k Hz BW, 51.5 m W per channel Median (half speed): 55.4 k Hz BW, 27.5 m W per channel Low power (lowest power): 13.8 k Hz BW, 9.375 m W per channel Input BW range: dc to 110.8 k Hz Programmable input bandwidth/sampling rates CRC error checking on data interface Daisy-chaining APPLICATIONS Data acquisition systems: USB/PXI/Ethernet Instrumentation and industrial control loops Audio testing and measurement Vibration and asset condition monitoring 3-phase power quality analysis Sonar High precision medical electroencephalogram (EEG)/ electromyography (EMG)/electrocardiogram (ECG) FUNCTIONAL BLOCK DIAGRAM AVDD1A, AVDD1B REFx+ REFx- AVDD2A, REGCAPA, AVDD2B REGCAPB DGND IOVDD DREGCAP BUFFERED VCM PRECHARGE ×8 REFERENCE BUFFERS 1.8V LDO AIN0+ CH 0 AIN0- AIN1+ CH 1 AIN1- AIN2+ CH 2 AIN2- AIN3+ CH 3 AIN3- AIN4+ CH 4 AIN4- P P P P P P P P P P Σ-Δ ADC Σ-Δ ADC Σ-Δ ADC Σ-Δ ADC Σ-Δ ADC DIGITAL FILTER ENGINE SINC5 LOW LATENCY FILTER WIDEBAND LOW RIPPLE FILTER OFFSET, GAIN PHASE CORRECTION OFFSET, GAIN PHASE CORRECTION OFFSET, GAIN PHASE...