THS1206-EP Datasheet, PDF (11/43 Pages) Texas Instruments – 12-BIT 6 MSPS, SIMULTANEOUS SAMPLING ANALOG-TO-DIGITAL CONVERTERS

continuous conversion mode (continued)
THS1206ĆEP
12ĆBIT 6 MSPS, SIMULTANEOUS SAMPLING
ANALOGĆTOĆDIGITAL CONVERTERS
SGLS126A − JULY 2002 − REVISED FEBRUARY 2003
Figure 4 shows the timing of continuous conversion mode when three analog input channels are selected. The
maximum throughput rate per channel is 2 MSPS in this mode. The data flow in the bottom of the figure shows
in which order the converted data is written into the FIFO. The timing of the DATA_AV signal shown here is for
a trigger level set to 3.
Sample N
Channel 1,2,3
Sample N+1
Channel 1,2,3
AIN
tw(CONV_CLKH)
CONV_CLK
td(A)
td(Pipe)
tw(CONV_CLKL)
50%
50%
tc
Data Into
FIFO
Data N−2
Channel 2
Data N−2
Channel 3
Data N−1
Channel 2
td(O)
Data N−1
Channel 2
Data N−1
Channel 3
Sample N+2
Channel 1,2,3
Data N
Channel 1
Data N
Channel 2
Data N+1
Channel 3
DATA_AV,
Trigger Level = 3
td(DATA_AV)
Figure 4. Timing of Continuous Conversion Mode (3-channel operation)
Figure 5 shows the timing of continuous conversion mode when four analog input channels are selected. The
maximum throughput rate per channel is 1.5 MSPS in this mode. The data flow in the bottom of the figure shows
in which order the converted data is written into the FIFO. The timing of the DATA_AV signal shown here is for
a trigger level of 4.
Sample N
Channel 1,2,3,4
AIN
tw(CONV_CLKH)
CONV_CLK
td(A)
50%
td(Pipe)
tw(CONV_CLKL)
50%
tc
Data Into
FIFO
Data N−2
Channel 4
Data N−1 Data N−1
Channel 1 Channel 2
Sample N+1
Channel 1,2,3,4
td(O)
Data N−1 Data N−1
Channel 3 Channel 4
Data N
Channel 1
Sample N+2
Channel 1,2,3,4
Data N
Data N
Channel 2 Channel 3
Data N
Channel 4
td(DATA_AV)
DATA_AV,
Trigger Level = 4
Figure 5. Timing of Continuous Conversion Mode (4-channel operation)
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