AD7912/AD7922

Rev. 0 | Page 21 of 32

CS

1

10

12

14

16

1

10

12

14

16

SCLK

DIN

DOUT

CH = STY

CHANNEL FOR NEXT CONVERSION

DAISY-CHAIN CYCLE

NORMAL MODE

VALID DATA

CONVERSION RESULT

Figure 30. Exiting Daisy-Chain Mode with CH = STY in the DIN Pin

110

13

THE PART ENTERS

NORMAL MODE

NORMAL MODE

A

16

1

16

SCLK

CS

DIN

CHANNEL FOR NEXT CONVERSION

CHANNEL FOR NEXT CONVERSION

DOUT

INVALID DATA

CONVERSION RESULT

Figure 31. Exiting Daisy-Chain Mode

CONVERSION CYCLE

DIN: CHN

DAISY-CHAIN MODE

DOUT:CHN

NORMAL MODE

DOUT: CHN = MOD

CONVERSION CYCLE

DIN: CHN = STY

CONVERSION

CYCLE

*CS HIGH BETWEEN

THE 10TH–12TH SCLK

CS HIGH BETWEEN

THE 2ND–10TH SCLK

CS HIGH BETWEEN

THE 10TH–13TH SCLK

POWER-UP TIME AND CS

HIGH AFTER THE 13TH SCLK

POWER-DOWN

MODE

POWER-UP TIME AND

CS HIGH BETWEEN

THE 10TH–12TH SCLK

CS HIGH BETWEEN

THE 2ND–10TH SCLK

*IF CS IS BROUGHT HIGH BETWEEN THE 10TH AND THE 12TH SCLK FALLING EDGE, THE DATA SHIFTED FROM ONE

ADC TO THE NEXT ONE IN THE CHAIN, WHILE THE PARTS ARE IN DAISY-CHAIN MODE, IS VALID DATA.

IF CS IS BROUGHT HIGH BETWEEN THE 12TH AND THE 13TH SCLK FALLING EDGE, THE DATA SHIFTED FROM ONE

ADC TO THE NEXT ONE IN THE CHAIN, WHILE THE PARTS ARE IN DAISY-CHAIN MODE, IS INVALID DATA.

Figure 32. Transitions between Modes of Operation