Datasheet

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STANDBY MODE WITH

Standby Mode

Begin Calibration

Data Ready After Calibration

DRDY/DOUT 23

1 24 25

22 21 0 23

SCLK

ADS1232

ADS1234

SBAS350F – JUNE 2005 – REVISED FEBRUARY 2008

To force an offset-calibration with Standby mode, shift

OFFSET-CALIBRATION 25 SCLKs and take the SCLK pin high to enter

Standby mode. Offset-calibration then begins after

Offset-calibration can be set to run immediately after

wake-up; see Figure 38 for the appropriate timing.

exiting Standby mode. This is useful when the

Note the extra time needed after wake-up for

ADS1232/4 is put in Standby mode for long periods

calibration before data are ready. The first data after

of time, and offset-calibration is desired afterwards to

Standby mode with offset-calibration is fully settled

compensate for temperature or supply voltage

and can be used right away.

changes.

Figure 38. Standby Mode with Offset-Calibration Timing (can be used for single conversions)

SYMBOL DESCRIPTION MIN MAX UNITS

SPEED = 1 103 103 ms

Data ready after exiting Standby mode

(1)

and calibration

SPEED = 0 803 803 ms

(1) Values given for f

CLK

= 4.9152MHz. For different f

CLK

frequencies, scale proportional to CLK period. Expect a ± 3% variation when an

internal oscillator is used.

Product Folder Link(s): ADS1232 ADS1234