AD7716BPZ Analog Devices Inc, AD7716BPZ Datasheet
AD7716BPZ
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AD7716BPZ Summary of contents
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FEATURES 22-Bit Sigma-Delta ADC Dynamic Range of 105 dB (146 Hz Input) 0.003% Integral Nonlinearity On-Chip Low-Pass Digital Filter Cutoff Programmable from 584 Hz to 36.5 Hz Linear Phase Response Five Line Serial I/O Twos Complement Coding Easy Interface ...
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AD7716–SPECIFICATIONS 5 –5 V 5%; AGND = DGND = Resistance = 750 with AGND at each A Parameter B Version STATIC PERFORMANCE Resolution 22 Integral Linearity Error 0.003 0.006 Gain ...
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Table I. Typical Usable Dynamic Range, RMS Noise and Filter Settling Time vs. Filter Cutoff Frequency Programmed Cutoff Output Update N Frequency (Hz) Rate (Hz) 0 584 2232 1 292 1116 2 146 558 3 73 279 4 36.5 140 ...
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AD7716 MASTER MODE TIMING CHARACTERISTICS MHz; Input Levels: Logic Logic CLKIN Limit MIN MAX Parameter (B Version 400 CLKIN ...
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SLAVE MODE TIMING CHARACTERISTICS MHz; Input Levels: Logic Logic CLKIN Parameter (B Version 400 CLKIN 1/f 23 ...
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AD7716 1 ABSOLUTE MAXIMUM RATINGS (T = +25 C unless otherwise noted AGND . . . . . . . . . . . . . . . . . . . . . . . . ...
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Pin Description AV Analog Positive Supply Nominal. This supplies +ve power to the analog modulators must be tied together externally. DV Digital Positive Supply Nominal. This supplies +ve power to the digital filter and ...
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AD7716 TERMINOLOGY LINEARITY ERROR This is the maximum deviation of any code from a straight line passing through the endpoints of the transfer function. The endpoints of the transfer function are zero scale (not to be con- fused with Bipolar ...
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GENERAL DESCRIPTION The AD7716 is a 4-channel 22-bit A/D converter with on-chip digital filtering, intended for the measurement of wide dynamic range, low frequency signals such as those representing ECG, EEG, chemical, physical or biological processes. It contains four sigma ...
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AD7716 relationship between input bandwidth and settling is given in Table I. Because of this settling time, most sigma delta ADCs are unsuitable for high speed multiplexing, where channels are switched and converted sequentially at high rates, as switching between ...
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Source Resistance If passive attenuators are used in front of the AD7716, care must be taken to ensure that the source impedance is suffi- ciently low. The dc input resistance for the AD7716 is greater than ...
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AD7716 CONTROL REGISTER DESCRIPTION The 16-bit control register is programmed in two 8-bit bytes; the low byte is programmed first and the high byte second. The loading format is LSB first (DB0 for the Least Significant Byte; DB8 for the ...
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RESET The AD7716 has a hardware reset which can be used to synchro- nize many devices. When the RESET pin goes low after being high for at least four CLKIN cycles, the modulator sampling points and digital filter starting points ...
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AD7716 MICROPROCESSOR INTERFACING Interfacing the AD7716 to the ADSP-2100 Family The ADSP-2100 family of microcomputers from Analog De- vices are high speed, high performance digital signal processors. Many members of the family have serial ports (known as SPORTs) which are ...
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When the AD7716 is programmed for the maximum cutoff fre- quency of 584 Hz, the output data rate is 2.25 kHz. This means that there is 440 s available to read the data and do the necessary number crunching before ...
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AD7716 Multibandwidth System Some applications may require multiple AD7716’s with differ- ent bandwidths programmed to each device. The best way to accomplish this is shown in Figure 12. The master mode inter- face is used for this example but the ...