AD7768

Data Sheet AD7768/AD7768-4 8-/4-Channel, 24-Bit, Simultaneous Sampling ADCs with Power Scaling, 110.8 kHz Bandwidth FEATURES ► Precision ac and dc performance ► 8-/4-channel simultaneous sampling ► 256 kSPS maximum ADC ODR per channel ► 108 dB dynamic range ► DC to 110.8 kHz maximum input bandwidth (−3 dB bandwidth) ► −120 dB THD, typical ► ±2 ppm of full-scale range (FSR) integral nonlinearity (INL), ±50 µV offset error, ±30 ppm of FSR gain error ► Optimized power dissipation vs. noise vs. input bandwidth ► Selectable power, speed, and input bandwidth ► Fast (highest speed): 110.8 kHz bandwidth, 51.5 mW per channel ► Median (half speed): 55.4 kHz bandwidth, 27.5 mW per channel ► Low power (lowest power): 13.8 kHz bandwidth, 9.375 mW per channel ► Per channel digital filter ► Programmable input bandwidth/sampling rates ► CRC error checking on data interface ► Daisy-chaining FUNCTIONAL BLOCK DIAGRAM ► Linear phase digital filter ► Low latency sinc5 filter ► Wideband brick wall filter: ±0.005 dB pass band ripple to 102.4 kHz ► Analog input precharge and reference precharge buffers ► Power supply ► AVDD1 = 5.0 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, no exposed pad ► Temperature range: −40°C to +105°C 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 precis...