AD7904/AD7914/AD7924
Data Sheet
PART IS IN
UNKNOWN MODE
AFTER POWER-ON
IF IN SHUTDOWN AT POWER-ON,
PART BEGINS TO POWER UP ON
CS RISING EDGE AS PM1 = PM0 = 1
ALLOW tPOWER TO ELAPSE
t12
CS
1
14
16
1
14
16
SCLK
DOUT
DIN
INVALID DATA
CHANNEL IDENTIFIER BITS + CONVERSION RESULT
DATA IN TO CONTROL REGISTER
DIN LINE HIGH FOR FIRST DUMMY CONVERSION
TO KEEP THE PART IN NORMAL MODE, LOAD
PM1 = PM0 = 1 IN CONTROL REGISTER
Figure 23. Placing the AD7904/AD7914/AD7924 into Normal Mode After Supplies Are First Applied
PART IS IN
UNKNOWN MODE
AFTER POWER-ON
PART ENTERS SHUTDOWN ON
CS RISING EDGE AS PM1 = 1, PM0 = 0
CS
1
14
16
SCLK
DOUT
DIN
INVALID DATA
DATA IN TO CONTROL REGISTER
CONTROL REGISTER IS LOADED ON
THE FIRST 12 CLOCKS. PM1 = 1, PM0 = 0
Figure 24. Placing the AD7904/AD7914/AD7924 into Full Shutdown Mode After Supplies Are First Applied
PART IS IN
UNKNOWN MODE
AFTER POWER-ON
PART ENTERS AUTO SHUTDOWN ON
CS RISING EDGE AS PM1 = 0, PM0 = 1
CS
1
14
16
1
14
16
SCLK
DOUT
DIN
INVALID DATA
INVALID DATA
DATA IN TO CONTROL REGISTER
DIN LINE HIGH FOR FIRST DUMMY CONVERSION
CONTROL REGISTER IS LOADED ON THE
FIRST 12 CLOCKS. PM1 = 0, PM0 = 1
Figure 25. Placing the AD7904/AD7914/AD7924 into Auto Shutdown Mode After Supplies Are First Applied
Rev. C | Page 24 of 32
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