Datasheet

DataReady
Start
Conversion
DRDY/DOUT
SCLK
CLKSource
Wakeup
Power-DownMode
PDWN
t
WAKEUP
t
TS_RDY
t
PDWN
AVDD
DVDD
PDWN
³ m10 s
ADS1231
www.ti.com SBAS414D –JULY 2009–REVISED OCTOBER 2013
POWER-DOWN MODE
Power-Down mode shuts down the entire ADC
circuitry and reduces the total power consumption
close to zero. To enter Power-Down mode, simply
hold the PDWN pin low. Power-Down mode also
resets the entire circuitry. Power-Down mode can be
initiated at any time during readback; it is not
necessary to retrieve all 24 bits of data beforehand.
Figure 22. Power-Up Timing Sequence
Figure 23 shows the wake-up timing from Power-
Down mode.
Figure 23. Wake-Up Timing from Power-Down Mode
SYMBOL DESCRIPTION MIN TYP UNITS
t
WAKEUP
(1)(2)
Wake-up time after Power-Down mode 7.95 μs
t
PDWN
(1)
PDWN pulse width 26 μs
(1) Based on an ideal internal oscillator.
(2) Typical required from simulation.
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