LTC2372-16_15 Datasheet, PDF (33/50 Pages) Linear Technology – 16-Bit, 500ksps, 8-Channel SAR ADC with 96dB SNR

LTC2372-16
Applications Information
new configuration may result in a different channel being
acquired. Additional valid input control words are written
into subsequent memory locations. The sequencer only
stores valid input control words and discards control words
that are partially written or have C[7] = 0. If C[7] = 0 at any
point during sequencer programming, the LTC2372-16
closes the input transaction window until the completion
of the next conversion as shown in Figure 20b. Figure 21
shows a truncated programming transaction where the
first partial input control word is discarded and the second
complete input control word is successfully programmed.
The transaction window also closes after 16 successive
valid input control words have been written, since the
sequencer memory has been filled.
CNV
BUSY
RDL
SCK
1
2
3
4
5
6
7
8
SDI
DON’T CARE
Hi-Z
SDO
C[7]
C[6] C[5] C[4] C[3] C[2] C[1] C[0]
D15 D14 D13 D12 D11 D10 D9 D8 D7
START OF NEW
TRANSACTION
WINDOW
1ST VALID CONTROL WORD ENTERED
SEQUENCER MEMORY CLEARED AND UPDATED
NEW CONFIGURATION APPLIED
NEW ACQUISITION PERIOD BEGINS
237218 F20a
Figure 20a. Valid Control Word Successfully Programmed, C[7] = 1
CNV
BUSY
RDL
SCK
1
2
3
4
5
6
7
8
SDI
DON’T CARE
C[7]
DON’T CARE
Hi-Z
SDO
D15 D14 D13 D12 D11 D10 D9 D8 D7
237218 F20b
START OF NEW
TRANSACTION
WINDOW
TRANSACTION WINDOW CLOSED
Figure 20b. Invalid Control Word Entered, C[7] = 0
For more information www.linear.com/LTC2372-16
237216f
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