AD7761

Data Sheet 8-Channel, 16-Bit, Simultaneous Sampling ADC with Power Scaling, 110.8 kHz BW AD7761 FEATURES Linear phase digital filter Precision ac and dc performance 8-channel simultaneous sampling 256 kSPS ADC ODR per channel 97.7 dB dynamic range 110.8 kHz input bandwidth (−3 dB BW) −120 dB 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 dB ripple to 102.4 kHz 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 kHz BW, 51.5 mW per channel Median (half speed): 55.4 kHz BW, 27.5 mW per channel Low power (lowest power): 13.8 kHz BW, 9.375 mW per channel Input BW range: dc to 110.8 kHz 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 VCM BUFFERED VCM VCM PRECHARGE ×8 REFERENCE...