Datasheet

ManualsBrandsANALOG DEVICES ManualsData collecting ICsData acquisition IC - AD converter (ADC) External TSSOP 16

AD7904/AD7914/AD7924 Data Sheet

Rev. C | Page 24 of 32

SCLK

DOUT

DIN

1 1614 1 1614

PART IS IN

UNKNOWN MODE

AFTER POWER-ON

ALLOW

POWER

TO ELAPSE

IF IN SHUTDOWN AT POWER-ON,

PART BEGINS TO POWER UP ON

CS RISING EDGE AS PM1 = PM0 = 1

DIN LINE HIGH FOR FIRST DUMMY CONVERSION TO KEEP THE PART IN NORMAL MODE, LOAD

PM1 = PM0 = 1 IN CONTROL REGISTER

INVALID DATA CHANNEL IDENTIFIER BITS + CONVERSION RESULT

DATA IN TO CONTROL REGISTER

03087-023

Figure 23. Placing the AD7904/AD7914/AD7924 into Normal Mode After Supplies Are First Applied

SCLK

DOUT

DIN

PART IS IN

UNKNOWN MODE

AFTER POWER-ON

PART ENTERS SHUTDOWN ON

CS RISING EDGE AS PM1 = 1, PM0 = 0

1 14 16

INVALID DATA

DATA IN TO CONTROL REGISTER

CONTROL REGISTER IS LOADED ON

THE FIRST 12 CLOCKS. PM1 = 1, PM0 = 0

03087-024

Figure 24. Placing the AD7904/AD7914/AD7924 into Full Shutdown Mode After Supplies Are First Applied

SCLK

DOUT

DIN

PART ENTERS AUTO SHUTDOWN ON

CS RISING EDGE AS PM1 = 0, PM0 = 1

1 14 16 1 14 16

PART IS IN

UNKNOWN MODE

AFTER POWER-ON

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

03087-025

Figure 25. Placing the AD7904/AD7914/AD7924 into Auto Shutdown Mode After Supplies Are First Applied