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Forum Post: Obtaining a reading as quickly as possible from the ADS1248?

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I'm working on an application where we need to power up the ADS1248, acquire a reading, then power it down as quickly as possible.  

Is this the correct sequence to go about doing this?

  1. Power up DVDD, AVDD
  2. Wait 2^16 clocks @ 4.096 MHz = 16 ms (minimum)
  3. SPI write: write first 4 registers with desired settings (VREF control always on, on-board reference, MUXCAL = normal, PGA = 1, DOR = 1000sps)
  4. SPI write: Self offset calibration (SELFOCAL)
  5. Poll DRDY until it goes low
  6. SPI write: Stop reading data continuously (SDATAC)
  7. SPI read: read all registers to confirm that they were properly written
  8. SPI write: write register 0 to select MUX input pair
  9. Poll DRDY until it goes low
  10. SPI write: read data once (RDATA)
  11. SPI read: clock in 24 bits of data

Overview:

Steps 3-4


Steps 5-7

Steps 7-8

Steps 9-11


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