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ADS1262 датащи(PDF) 39 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS |
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ADS1262 датащи(HTML) 39 Page - TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS |
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39 / 134 page ![]() Conversions (DRDY) + 105% PGAD_ALM bit Alarms latched during conversion cycle - 105% +105% VREF VOUTP VOUTN S Q Q R + ± + ± PGA ADC Digital Filter + ± -105% VREF Conversion Start Reset STATUS DATA 1 DATA 2 DATA 3 DATA 4 PGAD_ALM Bit 1 of STATUS byte Latch VREF Comparators PGA Output difference amplifier Data Bytes CRC/CHK ADS1262, ADS1263 www.ti.com SBAS661B – FEBRUARY 2015 – REVISED JULY 2015 9.3.7.1 PGA Differential Output Monitor ADC1 incorporates a differential PGA output voltage monitor. This voltage monitor triggers an alarm when the magnitude of the differential PGA output voltage is more positive than +105% or more negative than –105% of full scale, but only during a conversion cycle. The alarm event, corresponding to the conversion cycle when the alarm occurred, is set in the status byte (PGAD_ALM). For the next conversion, the alarm resets. If the magnitude of differential output voltage is within the range of ±105% of full-scale range, the alarm remains reset. The PGA differential monitor block diagram is shown in Figure 73. Figure 73. PGA Differential Overload Monitor Figure 74 shows an example of the differential overrange monitor event. Figure 74. PGA Differential Alarm Copyright © 2015, Texas Instruments Incorporated Submit Documentation Feedback 39 Product Folder Links: ADS1262 ADS1263 |
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