ADS7861_16 Datasheet, PDF (13/32 Pages) Texas Instruments – Dual, 500kSPS, 12-Bit, 2 + 2 Channel, Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTER

CLOCK
CONVST
A0
RD
Conversion 1
Start of Conversion 2
t_CKH
0
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
1
2
3
4
5
6
t_CKL
t₆
t₁
t₂
t₃
t₄
t₅
t₇
CS
SERIAL
DATA A
SERIAL
DATA B
BUSY
t₈
t₉
t₁₀
0
0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0
0
0
0 D11 D10 D9 D8
0
0 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0
0
0
0 D11 D10 D9 D8
t_CONV
t_ACQ
t_CONV
FIGURE 9. Mode I with Timing Specifications.
1
16
CLOCK
CONVST
A0
A0 HIGH, Next Conversion: Ch1
Conversion of Ch1
A0 LOW, Next Conversion: Ch0
RD Connected to CONVST
RD
CS
SERIAL
DATA A
SERIAL
DATA B
12-Bit Data of Chx
12-Bit Data of Chx
12-Bit Data of ChA1
12-Bit Data of ChB1
BUSY
Conversion of Chx
Conversion of Ch1
TIME 0
1µs
2µs
3µs
4µs
Time (seconds)
FIGURE 10. Mode I, Timing Diagram for M0 = 0 and M1 = 0.
ADS7861
SBAS110D
Conversion of Ch0
CS HIGH, Outputs in Tri-State
Conversion of Ch0
5µs
6µs
13