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AD7761 Dataheets PDF



Part Number AD7761
Manufacturers Analog Devices
Logo Analog Devices
Description Simultaneous Sampling ADC
Datasheet AD7761 DatasheetAD7761 Datasheet (PDF)

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 k.

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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 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 CORRECTION OFFSET, GAIN PHASE CORRECTION OFFSET, GAIN PHASE CORRECTION 1.8V LDO ADC OUTPUT DATA SERIAL INTERFACE SYNC_IN SYNC_OUT START RESET FORMAT1 FORMAT0 DRDY DCLK DOUT0 DOUT1 DOUT2 DOUT3 DOUT4 DOUT5 DOUT6 DOUT7 AIN5+ CH 5 AIN5– AIN6+ CH 6 AIN6– P P P P Σ-Δ ADC Σ-Δ ADC OFFSET, GAIN PHASE CORRECTION OFFSET, GAIN PHASE CORRECTION SPI CONTROL INTERFACE ST0/CS ST1/SCLK DEC0/SDO DEC1/SDI AIN7+ CH 7 AIN7– P Σ-Δ P ADC ×16 ANALOG INPUT PRECHARGE BUFFERS (P) OFFSET, GAIN PHASE CORRECTION AD7761 PIN/SPI 14285-001 AVSS XTAL2/MCLK Figure 1. XTAL1 MODE3/GPIO3 FILTER/GPIO4 TO MODE0/GPIO0 Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Te.


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