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ADS1248IPW Datasheet(PDF) 11 Page - Texas Instruments |
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ADS1248IPW Datasheet(HTML) 11 Page - Texas Instruments |
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11 / 60 page  NOISE PERFORMANCE ADS1246 ADS1247 ADS1248 www.ti.com .................................................................................................................................................. SBAS426C – AUGUST 2008 – REVISED AUGUST 2009 The ADS1246/7/8 noise performance can be optimized by adjusting the data rate and PGA setting. As the averaging is increased by reducing the data rate, the noise drops correspondingly. Increasing the PGA value reduces the input-referred noise, particularly useful when measuring low-level signals. Table 5 to Table 10 summarize noise performance of the ADS1246/7/8. The data are representative of typical noise performance at T = +25°C. The data shown are the result of averaging the readings from multiple devices and were measured with the inputs shorted together. A minimum of 128 consecutive readings were used to calculate the RMS and peak-to-peak noise for each reading. Table 5, Table 7, and Table 9 list the input-referred noise in units of µV RMS on µVPP for the conditions shown. Table 6, Table 8, and Table 10 list the corresponding data in units of ENOB (effective number of bits) where: ENOB = ln(Full-Scale Range/Noise)/ln(2) Table 7 to Table 10 use the internal reference available on the ADS1247 and ADS1248. The data though are also representative of the ADS1246 noise performance when using a low-noise external reference such as the REF5020. Copyright © 2008–2009, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Link(s): ADS1246 ADS1247 ADS1248 |
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