1
16
CLOCK
CONVST
A0
M1 = 1 and 1st CONVST
Conversion
M1 = 1 and 2nd CONVST
No Conversion
M1 = 1 and 1st CONVST
Conversion
M1 = 1 and 2nd CONVST
No Conversion
Conversion of Chx
M0 HIGH
4-Ch Operation Starts, A0 Ignored
M0 HIGH
4-Ch Operation Starts
M0 = 1 and 1st Active CONVST
Ch0
M0 = 1 and 2nd Active CONVST
Ch1
M0
M1 HIGH
M1
RD
Only Serial Data A Used as Output Starting with 1st Conversion
RD Connected with CONVST
CS LOW Output Active
CS
C C
h h
0 A
C
h
0
C
h
B
C
h
1
C
h
A
C C
h h
1 B
SERIAL
DATA A
st
nd
st
nd
12-Bit Data of ChAx
12-Bit Data of ChBx
M1 = 1 and 1 CONVST
M1 = 1 and 2 CONVST
M1 = 1 and 1 CONVST
M1 = 1 and 2 CONVST
Data of ChA0
Data of ChB0
Data of ChA1
Data of ChB1
M1 = 1 Serial Data B in Tri-state
SERIAL
DATA B
st
nd
st
nd
Conversion of Chx
M1 = 1 and 1 CONVST
Conversion
M1 = 1 and 2 CONVST
No Conversion
M1 = 1 and 1 CONVST
M1 = 1 and 2 CONVST
No Conversion
BUSY
Conversion
TIME 0
5µs
10µs
Time (seconds)
FIGURE 13. Mode IV, Timing Diagram for M0 = 1 and M1 = 1.
ADS7861
SBAS110D
15
TI [ TEXAS INSTRUMENTS ]
